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Smith P, Le Devendec L, Jouy E, Larvor E, Verner-Jeffreys D, Joseph AW, Stanton E, Light E, Cortinovis L, Pretto T, Manfrin A, Boitard PM, Jamin M, Keck N, Le Breton A, Thuillier B, Ravaille C, Baron S. Epidemiological cut-off values for Yersina ruckeri disc diffusion data generated by a standardised method. Dis Aquat Organ 2024; 158:21-25. [PMID: 38661134 DOI: 10.3354/dao03779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
In order to establish the meaning of data generated in antimicrobial agent susceptibility tests, it is necessary to develop internationally harmonised interpretive criteria. Currently, such criteria have not been developed for data generated in studies of the susceptibility of the fish pathogen Yersinia ruckeri. This work generated the data that would be required to set epidemiological cut-off values for the susceptibility data of this species that had been generated using a standardised disc diffusion method that specified the use of Mueller Hinton agar and incubation at 22°C for 24-28 h. Using this method, sets of inhibition zones data for 4 antimicrobial agents were generated by 3 independent laboratories. The data from these laboratories were aggregated and analysed using the statistically based normalised resistance interpretation. For ampicillin, florfenicol, oxytetracycline and trimethoprim-sulfamethoxazole the cut-off values calculated by this analysis were ≥16, ≥23, ≥24 and ≥30 mm, respectively. Evidence is presented demonstrating that the data for these 4 agents was of sufficient quantity and quality that they could be used by the relevant authorities to set internationally harmonised, consensus epidemiological cut-off values for Y. ruckeri.
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Affiliation(s)
- Peter Smith
- School of Natural Science, University of Galway, Galway H91 TK33 , Ireland
| | - Laëtitia Le Devendec
- Anses, Ploufragan-Plouzané-Niort Laboratory, Mycoplasmology-Bacteriology-Antimicrobial Resistance Unit, 22440 Ploufragan, France
| | - Eric Jouy
- Anses, Ploufragan-Plouzané-Niort Laboratory, Mycoplasmology-Bacteriology-Antimicrobial Resistance Unit, 22440 Ploufragan, France
| | - Emeline Larvor
- Anses, Ploufragan-Plouzané-Niort Laboratory, Mycoplasmology-Bacteriology-Antimicrobial Resistance Unit, 22440 Ploufragan, France
| | - David Verner-Jeffreys
- Centre for Environment, Fisheries and Aquaculture Science, Weymouth DT4 8UB, UK
- UK FAO Reference Centre for AMR, Weymouth DT4 8UB, UK
| | - Andrew Wokorac Joseph
- Centre for Environment, Fisheries and Aquaculture Science, Weymouth DT4 8UB, UK
- UK FAO Reference Centre for AMR, Weymouth DT4 8UB, UK
| | - Elliot Stanton
- University of Bristol Veterinary School, Langford, Bristol BS40 5DU, UK
| | - Edel Light
- Veterinary Medicines Directorate (VMD),Woodham Lane, New Haw, Surrey KT15 3LS, UK
| | - Luana Cortinovis
- Fish Pathology Unit, Istituto Zooprofilattico Sperimentale delle Venezie, 35020 Legnaro, Italy
| | - Tobia Pretto
- Fish Pathology Unit, Istituto Zooprofilattico Sperimentale delle Venezie, 35020 Legnaro, Italy
| | - Amedeo Manfrin
- Fish Pathology Unit, Istituto Zooprofilattico Sperimentale delle Venezie, 35020 Legnaro, Italy
| | | | - Matthieu Jamin
- FILI@VET, 15 Rue du Puits, 29600 Saint Martin des Champs, France
| | - Nicolas Keck
- Laboratoire Départemental Vétérinaire de l'Hérault, 34000 Montpellier, France
| | | | - Benoit Thuillier
- Labocéa, Microbiologie vétérinaire, site de Quimper, 29000 Quimper, France
| | | | - Sandrine Baron
- Anses, Ploufragan-Plouzané-Niort Laboratory, Mycoplasmology-Bacteriology-Antimicrobial Resistance Unit, 22440 Ploufragan, France
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Duodu S, Ayiku ANA, Adelani AA, Daah DA, Amoako EK, Jansen MD, Cudjoe KS. Serotype distribution, virulence and antibiotic resistance of Streptococcus agalactiae isolated from cultured tilapia Oreochromis niloticus in Lake Volta, Ghana. Dis Aquat Organ 2024; 158:27-36. [PMID: 38661135 DOI: 10.3354/dao03780] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
Streptococcus agalactiae infection is one of the major factors limiting the expansion of tilapia farming globally. In this study, we investigated the serotype distribution, virulence and antimicrobial resistance of S. agalactiae isolates from tilapia farmed in Lake Volta, Ghana. Isolates from 300 moribund fish were characterised by Gram staining, MALDI-TOF/MS and 16S rRNA sequencing. Serotype identification was based on multiplex polymerase chain reaction (PCR) amplification of the capsular polysaccharide genes. Detection of virulence genes (cfb, fbsA and cspA) and histopathology were used to infer the pathogenicity of the isolates. The susceptibility of isolates to antibiotics was tested using the Kirby-Bauer disk diffusion assay. All 32 isolates identified as S. agalactiae were of serotype Ia. This was notably different from isolates previously collected from the farms in 2017, which belonged to serotype Ib, suggesting a possible serotype replacement. The prevalence of the pathogen was related to the scale of farm operation, with large-scale farms showing higher S. agalactiae positivity. Data from histopathological analysis and PCR amplification of targeted virulence genes confirmed the virulence potential and ability of the isolates to cause systemic infection in tilapia. Except for gentamicin, the majority of the isolates were less resistant to the tested antibiotics. All isolates were fully sensitive to oxytetracycline, erythromycin, florfenicol, enrofloxacin, ampicillin and amoxicillin. This study has improved our understanding of the specific S. agalactiae serotypes circulating in Lake Volta and demonstrates the need for continuous monitoring to guide the use of antimicrobials and vaccines against streptococcal infections in Ghanaian aquaculture systems.
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Affiliation(s)
- Samuel Duodu
- Department of Biochemistry, Cell and Molecular Biology, University of Ghana, LG54 Volta Rd, Legon-Accra, Ghana
- West African Centre for Cell Biology of Infectious Pathogens (WACCBIP), College of Basic and Applied Sciences, University of Ghana, LG54 Volta Rd, Legon-Accra, Ghana
| | - Angela N A Ayiku
- Department of Biochemistry, Cell and Molecular Biology, University of Ghana, LG54 Volta Rd, Legon-Accra, Ghana
- West African Centre for Cell Biology of Infectious Pathogens (WACCBIP), College of Basic and Applied Sciences, University of Ghana, LG54 Volta Rd, Legon-Accra, Ghana
| | - Abigail A Adelani
- West African Centre for Cell Biology of Infectious Pathogens (WACCBIP), College of Basic and Applied Sciences, University of Ghana, LG54 Volta Rd, Legon-Accra, Ghana
| | - Derrick A Daah
- Department of Biochemistry, Cell and Molecular Biology, University of Ghana, LG54 Volta Rd, Legon-Accra, Ghana
- West African Centre for Cell Biology of Infectious Pathogens (WACCBIP), College of Basic and Applied Sciences, University of Ghana, LG54 Volta Rd, Legon-Accra, Ghana
| | - Enock K Amoako
- West African Centre for Cell Biology of Infectious Pathogens (WACCBIP), College of Basic and Applied Sciences, University of Ghana, LG54 Volta Rd, Legon-Accra, Ghana
| | - Mona D Jansen
- Norwegian Veterinary Institute, Elizabeth Stephansons vei 1, 1433 Ås, Norway
| | - Kofitsyo S Cudjoe
- Norwegian Veterinary Institute, Elizabeth Stephansons vei 1, 1433 Ås, Norway
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Wu C, Xiong L, Liao Q, Zhang W, Xiao Y, Xie Y. Clinical manifestations, antimicrobial resistance and genomic feature analysis of multidrug-resistant Elizabethkingia strains. Ann Clin Microbiol Antimicrob 2024; 23:32. [PMID: 38600542 PMCID: PMC11007976 DOI: 10.1186/s12941-024-00691-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Accepted: 03/26/2024] [Indexed: 04/12/2024] Open
Abstract
BACKGROUND Elizabethkingia is emerging as an opportunistic pathogen in humans. The aim of this study was to investigate the clinical epidemiology, antimicrobial susceptibility, virulence factors, and genome features of Elizabethkingia spp. METHODS Clinical data from 71 patients who were diagnosed with Elizabethkingia-induced pneumonia and bacteremia between August 2019 and September 2021 were analyzed. Whole-genome sequencing was performed on seven isolates, and the results were compared with a dataset of 83 available Elizabethkingia genomes. Genomic features, Kyoto Encyclopedia of Genes and Genomes (KEGG) results and clusters of orthologous groups (COGs) were analyzed. RESULTS The mean age of the patients was 56.9 ± 20.7 years, and the in-hospital mortality rate was 29.6% (21/71). Elizabethkingia strains were obtained mainly from intensive care units (36.6%, 26/71) and emergency departments (32.4%, 23/71). The majority of the strains were isolated from respiratory tract specimens (85.9%, 61/71). All patients had a history of broad-spectrum antimicrobial exposure. Hospitalization for invasive mechanical ventilation or catheter insertion was found to be a risk factor for infection. The isolates displayed a high rate of resistance to cephalosporins and carbapenems, but all were susceptible to minocycline and colistin. Genomic analysis identified five β-lactamase genes (blaGOB, blaBlaB, blaCME, blaOXA, and blaTEM) responsible for β-lactam resistance and virulence genes involved in stress adaptation (ureB/G, katA/B, and clpP), adherence (groEL, tufA, and htpB) and immune modulation (gmd, tviB, cps4J, wbtIL, cap8E/D/G, and rfbC). Functional analysis of the COGs revealed that "metabolism" constituted the largest category within the core genome, while "information storage and processing" was predominant in both the accessory and unique genomes. The unique genes in our 7 strains were mostly enriched in KEGG pathways related to microRNAs in cancer, drug resistance (β-lactam and vancomycin), ABC transporters, biological metabolism and biosynthesis, and nucleotide excision repair mechanisms. CONCLUSION The Elizabethkingia genus exhibits multidrug resistance and carries carbapenemase genes. This study presents a comparative genomic analysis of Elizabethkingia, providing knowledge that facilitates a better understanding of this microorganism.
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Affiliation(s)
- Chongyang Wu
- Department of Laboratory Medicine, West China Hospital of Sichuan University, Chengdu, Sichuan, 610041, China
| | - Li Xiong
- Department of Laboratory Medicine, West China Hospital of Sichuan University, Chengdu, Sichuan, 610041, China
| | - Quanfeng Liao
- Department of Laboratory Medicine, West China Hospital of Sichuan University, Chengdu, Sichuan, 610041, China
| | - Weili Zhang
- Department of Laboratory Medicine, West China Hospital of Sichuan University, Chengdu, Sichuan, 610041, China
| | - Yuling Xiao
- Department of Laboratory Medicine, West China Hospital of Sichuan University, Chengdu, Sichuan, 610041, China
| | - Yi Xie
- Department of Laboratory Medicine, West China Hospital of Sichuan University, Chengdu, Sichuan, 610041, China.
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Sajedi Moghaddam S, Mamishi S, Pourakbari B, Mahmoudi S. Bacterial etiology and antimicrobial resistance pattern of pediatric bloodstream infections: a 5-year experience in an Iranian referral hospital. BMC Infect Dis 2024; 24:373. [PMID: 38565980 PMCID: PMC10988941 DOI: 10.1186/s12879-024-09260-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Accepted: 03/26/2024] [Indexed: 04/04/2024] Open
Abstract
BACKGROUND Bloodstream infections (BSI) are the major cause of morbidity and mortality in children in developing countries. The purpose of the current study was to establish the antimicrobial susceptibility pattern of bacterial isolates from bloodstream infections at Children's Medical Center Hospital (CMC), Tehran, Iran. METHODS We retrospectively recorded all positive blood cultures and antimicrobial susceptibility of all bloodstream isolates among children admitted to CMC, during 5 years. Specimen culture, bacterial identification, and antimicrobial susceptibility testing were performed according to standard laboratory methods. RESULTS From 3,179 pathogens isolated from the blood cultures 2,824 bacteria were cultured, with 1,312 cases being identified as Gram-positive bacteria (46%) and 1,512 cases as Gram-negative bacteria (54%). The most common Gram-negative bacteria isolated were as follows: Pseudomonas spp. (n = 266, 17.6%), Klebsiella pneumoniae (n = 242, 16%), Stenotrophomonas maltophilia (n = 204, 13.5%), Enterobacter spp. (n = 164, 10.8%), Escherichia coli (n = 159, 10.5%), Pseudomonas aeruginosa (n = 126, 8.3%), Serratia marcescens (n = 121, 8%), and Acinetobacter baumannii (n = 73, 4.8%). The most common Gram-positive bacteria isolated were coagulase-negative staphylococci (CONS) (n = 697, 53%), Streptococcus spp. (n = 237, 18%), Staphylococcus aureus (n = 202, 15%) and Enterococcus spp. (n = 167, 12.7%). 34% of bacterial strains were isolated from ICUs. The rates of methicillin resistance in S. aureus and CONS were 34% and 91%, respectively. E. coli isolates showed high resistance to cefotaxime (84%). All isolates of K. pneumoniae were susceptible to colistin and 56% were susceptible to imipenem. P. aeruginosa isolates showed high susceptibility to all antibiotics. CONCLUSIONS Our findings emphasize the need of clinicians having access to up-to-date bacterial susceptibility data for routinely prescribed drugs. Continuous monitoring of changes in bacterial resistance will aid in the establishment of national priorities for local intervention initiatives in Iran. The increased risk of BSI caused by antibiotic-resistant organisms, emphasizes the significance of implementing appropriate antibiotic prescribing regulations and developing innovative vaccination techniques in Iran.
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Affiliation(s)
- Sadaf Sajedi Moghaddam
- Pediatric Infectious Disease Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Setareh Mamishi
- Pediatric Infectious Disease Research Center, Tehran University of Medical Sciences, Tehran, Iran.
- Department of Infectious Diseases, Pediatrics Center of Excellence, Children's Medical Center, Tehran University of Medical Sciences, Dr. Gharib Street, Keshavarz Boulevard, Tehran, Iran.
| | - Babak Pourakbari
- Pediatric Infectious Disease Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Shima Mahmoudi
- Biotechnology Centre, Silesian University of Technology, Gliwice, Poland.
- Tehran University of Medical Sciences, Tehran, Iran.
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Ismail ET, El-Son MAM, El-Gohary FA, Zahran E. Prevalence, genetic diversity, and antimicrobial susceptibility of Vibrio spp. infected gilthead sea breams from coastal farms at Damietta, Egypt. BMC Vet Res 2024; 20:129. [PMID: 38561778 PMCID: PMC10986055 DOI: 10.1186/s12917-024-03978-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2024] [Accepted: 03/15/2024] [Indexed: 04/04/2024] Open
Abstract
BACKGROUND Vibriosis is one of the most serious bacterial diseases and causes high morbidity and mortality among cultured sea breams. This study was undertaken to track the surveillance of Vibrio infection and its correlation to environmental factors. A total of 115 gilthead sea breams were collected seasonally from a private earthen pond fish farm in the Shatta area of Damietta, Egypt from September 2022 to July 2023. Physicochemical parameters of water were analyzed, and heavy metal levels were measured. The fish samples were subjected to clinical, bacteriological, Enterobacterial Repetitive Intergenic Consensus (ERIC) fingerprinting, and hematoxylin and Eosin histopathological staining. RESULTS The results revealed significant variations in the water quality parameters over different seasons, in addition to an increase in heavy metals. Naturally infected fish showed external signs and postmortem lesions that were relevant to bacterial infection. Two dominant Vibrio subspecies of bacteria were identified: V. alginolyticus (205 isolates) and V. fluvialis (87 isolates). PCR confirmed the presence of V. alginolyticus using the species-specific primer collagenase at 737 bp. The highest prevalence of V. alginolyticus was detected during the summer season (57.72%), and the lowest prevalence was observed in autumn (39.75%). The correlation analysis revealed a positive relationship between V. alginolyticus and water temperature (r = 0.69). On the other hand, V. fluvialis showed a high prevalence during the autumn season (25.30%) and the lowest prevalence during the summer season (10.56%), where it was negatively correlated with water temperatures (r =-0.03). ERIC fingerprinting showed genetic variation within the Vibrio isolates. Antimicrobial susceptibility testing revealed sensitivity to ciprofloxacin and doxycycline, and resistance to amoxicillin and erythromycin. The multiple antibiotic resistance (MAR) index values for V. alginolyticus and V. fluvialis ranged from 0.3 to 0.7, with a multi-drug resistance pattern to at least three antibiotics. Histopathological alterations in the affected tissues revealed marked hemorrhage, vascular congestion, and hemosiderosis infiltration. CONCLUSION This study provides insights into the potential propagation of waterborne diseases and antibiotic resistance in the environment. Ensuring that the environment does not serve as a reservoir for virulent and contagious Vibrio species is a critical concern for regional aquaculture industries. Therefore, we recommend implementing environmental context-specific monitoring and surveillance tools for microbial resistance.
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Affiliation(s)
- Esraa Tawfeek Ismail
- Department of Aquatic Animal Medicine, Faculty of Veterinary Medicine, Mansoura University, Mansoura, 35516, Egypt
| | - Mai A M El-Son
- Department of Aquatic Animal Medicine, Faculty of Veterinary Medicine, Mansoura University, Mansoura, 35516, Egypt
| | - Fatma A El-Gohary
- Department of Hygiene and Zoonoses, Faculty of Veterinary Medicine, Mansoura University, Mansoura, 35516, Egypt
| | - Eman Zahran
- Department of Aquatic Animal Medicine, Faculty of Veterinary Medicine, Mansoura University, Mansoura, 35516, Egypt.
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Tsai CS, Lu PL, Lu MC, Hsieh TC, Chen WT, Wang JT, Ko WC. Ribotypes and antimicrobial susceptibility profiles of clinical Clostridioides difficile isolates: A multicenter, laboratory-based surveillance in Taiwan, 2019-2021. J Microbiol Immunol Infect 2024; 57:320-327. [PMID: 38135646 DOI: 10.1016/j.jmii.2023.12.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2023] [Revised: 11/30/2023] [Accepted: 12/12/2023] [Indexed: 12/24/2023]
Abstract
BACKGROUND The clinical burden of Clostridioides difficile infections (CDIs) remains substantial globally. This study aimed to investigate the ribotypes (RTs) and antimicrobial susceptibility of C. difficile isolates collected in Taiwan. METHODS C. difficile isolates were prospectively collected from four medical centers in Taiwan from 2019 to 2021. In a reference laboratory, in vitro susceptibility to clindamycin, moxifloxacin, metronidazole, vancomycin, fidaxomicin, and rifaximin were tested, and ribotyping was conducted to determine their genetic diversity. RESULTS A total of 568 C. difficile isolates were included. Metronidazole resistance was not observed, and the susceptibility rate of vancomycin was 99.5 %. Clindamycin showed poor activity against these isolates, with a resistance rate of 74.8 %. Fidaxomicin exhibited potent activity and 97.4 % of isolates were inhibited at 0.25 μg/mL. Rifaximin MIC90 increased from 0.015 μg/mL in 2019 to 0.03 μg/mL in 2020 and 2021. Of 40 RTs identified, two predominant RTs were RT 078/126 (78, 14 %) and 014/020 (76, 13 %). RT 017, traditional harboring truncated tcdA, accounted for 3 % (20 isolates) and there was no isolate belonging to RT 027. The proportions of RT 078 increased from 11.2 % in 2019 to 17.1 % in 2021, and the predominance of RT 078/126 was more evident in central Taiwan. CONCLUSIONS Vancomycin, fidaxomicin, and metronidazole remain in vitro effective against clinical C. difficile isolates in Taiwan. The reservoirs and genetic relatedness of two major RTs with zoonotic potentials, RT 078/126 and 014/020, warrant further investigations.
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Affiliation(s)
- Chin-Shiang Tsai
- Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan; Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Po-Liang Lu
- Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan; School of Post-Baccalaureate Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan; Center for Liquid Biopsy and Cohort Research, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Min-Chi Lu
- Department of Internal Medicine, China Medical University Hospital, School of Medicine, China Medical University, Taichung, Taiwan
| | - Tai-Chin Hsieh
- Global Medical and Scientific Affairs, MSD Taiwan, Taipei, Taiwan
| | - Wei-Ting Chen
- Global Medical and Scientific Affairs, MSD Taiwan, Taipei, Taiwan
| | - Jann-Tay Wang
- Department of Internal Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan.
| | - Wen-Chien Ko
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan.
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Yilmaz M, Arslan T, Atalay Oral M, Kubilay A. Antibiotic susceptibility and resistance genes profiles of Vagococcus salmoninarum in a rainbow trout ( Oncorhyncus mykiss, Walbaum) farm. PeerJ 2024; 12:e17194. [PMID: 38560471 PMCID: PMC10981890 DOI: 10.7717/peerj.17194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Accepted: 03/13/2024] [Indexed: 04/04/2024] Open
Abstract
Disease outbreaks negatively affect fish production. Antimicrobial agents used in the treatment of diseases become ineffective over time because of antibiotic resistance developed by bacteria distributed in the aquaculture environment. This study was conducted for 4 months (cold period) in a fish farm to detect the fish disease, cold water streptococcosis. In the study, four brood stock showing disease signs were detected. Bacteria isolates were obtained and identified as Vagococcus salmoninarum. Antimicrobial susceptibility of V. salmoninarum was tested and antibiotic resistance gene profiles of V. salmoninarum isolates were screened. The phylogenetic relation of the isolates with the previously reported strains was evaluated. Antibiotic resistance developed by pathogenic bacteria is distributed in the aquaculture environment. The transfer of resistance genes from one bacterium to another is very common. This situation causes the antimicrobial agents used in the treatment of diseases to become ineffective over time. The disc diffusion test showed that all four isolates developed resistance to 13 (FFC30, AX25, C30, E15, CF30, L2, OX1, S10, T30, CRO30, CC2, PT15 and TY15) of the evaluated antibiotics and were about to develop resistance to six others (AM 10, FM 300, CFP75, SXT25, APR15 and TE30). Furthermore, antibiotic resistance genes tetA, sul1, sul2, sul3, dhfr1, ereB and floR were detected in the isolated strain. Moreover, the phylogenetic analysis showed that isolated V. salmoninarum strain (ESN1) was closely related to the bacterial strains isolated from USA and Jura.
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Affiliation(s)
- Mesut Yilmaz
- Department of Aquaculture, Faculty of Fisheries, Akdeniz University, Antalya, Turkey
| | - Tulin Arslan
- Faculty of Fisheries, Mugla University, Muğla, Turkey
| | - Mükerrem Atalay Oral
- Elmalı Vocational School of Higher Education, Akdeniz University, Antalya, Turkey
| | - Aysegul Kubilay
- Faculty of Eğirdir Fisheries, Isparta University of Applied Sciences, Isparta, Turkey
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Al-Shahrani GS, Belali TM. Frequency of drug-resistant bacterial isolates among pregnant women with UTI in maternity and children's hospital, Bisha, Saudi Arabia. Sci Rep 2024; 14:7397. [PMID: 38548851 PMCID: PMC10978862 DOI: 10.1038/s41598-024-58275-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Accepted: 03/27/2024] [Indexed: 04/01/2024] Open
Abstract
Urinary tract infections (UTIs) are one of the most prevalent bacterial infections affecting humans, with a higher incidence among women. Pregnant women are at an increased risk of developing UTIs, which can have detrimental consequences for both the mother and fetus. UTIs can be caused by various bacteria, and the prevalence of drug-resistant UTIs in maternity and children's hospitals is a cause for concern due to the potential for severe complications if left untreated. The primary objective of the current study was to determine the distribution of UTI-causing bacteria and investigate the antibiotic sensitivity patterns of isolated cultures obtained from pregnant women with UTIs at the Maternity and Children's Hospital, Bisha, Saudi Arabia. This cross-sectional study was conducted from October 2021 to October 2023, involving the analysis of urine samples collected from 321 participants who acquired UTIs during pregnancy. Using biochemical tests and standard cultures, the urine samples were examined for pathogenic bacteria and their anti-microbial sensitivity patterns. The study analyzed susceptibility results according to the Clinical Laboratory Standards Institute guidelines (M100, 28th Edition, 2018). Bacterial strains demonstrating resistance to three or more antibiotics were classified as multidrug-resistant (MDR). This study revealed the distribution of UTI-causing bacteria to be as follows: Escherichia coli, 57.01%; Klebsiella pneumoniae, 24.61%; Pseudomonas aeruginosa, 4.36%; Proteus mirabilis and Enterobacter cloacae, 3.74%; Streptococcus agalactiae, 3.11%; Enterococcus faecalis, 2.18%; and Staphylococcus aureus, 1.24%. Antimicrobial susceptibility testing varied among gram-positive and gram-negative bacteria. Gentamicin demonstrated the highest sensitivity among both gram-positive and gram-negative bacteria; piperacillin-tazobactam was the second most effective drug against gram-negative bacteria. The bacterial isolates showed varying susceptibility to different antibiotics, with Escherichia coli, Klebsiella pneumoniae, and Pseudomonas aeruginosa being mainly sensitive to gentamicin, piperacillin-tazobactam, and ciprofloxacin, respectively. The strategies for reducing the risk of UTIs need to be improved to limit the spread of MDR bacteria. These strategies may include promoting hygienic practices and administering appropriate antibiotics to prevent the emergence and spread of drug-resistant bacteria. Further research is required to monitor the trends in antibiotic resistance among UTI-causing bacteria and develop effective strategies for managing this public health menace.
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Affiliation(s)
- Ghady S Al-Shahrani
- Faculty of Applied Medical Sciences, University of Bisha, 255, Al Nakhil, 67714, Bisha, Saudi Arabia
| | - Tareg M Belali
- Faculty of Applied Medical Sciences, University of Bisha, 255, Al Nakhil, 67714, Bisha, Saudi Arabia.
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Tsai MH, Chen CL, Chang HJ, Chuang TC, Chiu CH. Antimicrobial activity of eravacycline and other comparative agents on aerobic and anaerobic bacterial pathogens in Taiwan: A clinical microbiological study. J Glob Antimicrob Resist 2024; 37:93-99. [PMID: 38552878 DOI: 10.1016/j.jgar.2024.03.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Revised: 03/08/2024] [Accepted: 03/24/2024] [Indexed: 04/20/2024] Open
Abstract
OBJECTIVES Eravacycline, a new tetracycline derivative, exhibits broad-spectrum antimicrobial susceptibility. This study aimed to comprehensively investigate in vitro activities of eravacycline, tigecycline, and ertapenem against various Gram-positive, Gram-negative, and anaerobic bacteria. METHODS Minimum inhibitory concentrations (MICs) were determined using the broth microdilution method. The following bacterial species were collected: vancomycin-sensitive (VS) Enterococci species, vancomycin-resistant Enterococci species (VRE), Staphylococcus aureus, Streptococcus anginosus, Bacteroides species, Clostridioides difficile, Clostridium innocuum, Clostridium perfringens, Parabacteroides distasonis, and Stenotrophomonas maltophilia. RESULTS We found that eravacycline exhibited superior in vitro activity compared to tigecycline and ertapenem. Notably, it exhibited the lowest MIC90 for several bacterial species, including VS E. faecalis (0.12 µg/mL), VS E. faecium (0.12 µg/mL), and others. Besides, VRE was susceptible to eravacycline (MIC90:0.12 µg/mL) and tigecycline (MIC90:0.12 µg/mL), but was all resistant to ertapenem (MIC90 > 64 µg/mL). S. aureus was also susceptible to eravacycline (MIC90:0.5 µg/mL) as well as tigecycline (MIC90:1.0 µg/mL). Furthermore, S. anginosus showed higher susceptibility to eravacycline (MIC90:2.0 µg/mL) and tigecycline (MIC90:4.0 µg/mL), but lower to ertapenem (MIC90:32.0 µg/mL). Eravacycline and tigecycline also demonstrated good susceptibility to anaerobes, including Bacteroides species (susceptibility rate: 100%), P. distasonis (100%), C. difficile (94.1‒100%), C. innocuum (94.1‒96.1%), and C. perfringens (88.9‒96.3%). For S. maltophilia, both tigecycline and eravacycline showed an MIC90 of 2 µg/mL. A moderate-to-strong correlation (rho = 0.608-0.804, P < 0.001) was noted between the MIC values of eravacycline and tigecycline against various bacterial species. CONCLUSIONS Our study highlights the potential of eravacycline as an effective treatment option for multidrug-resistant bacterial infections.
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Affiliation(s)
- Ming-Han Tsai
- Department of Pediatrics, Chang Gung Memorial Hospital, Keelung, Taiwan; Department of Microbiology and Immunology, Chang Gung University College of Medicine, Taoyuan, Taiwan; Molecular Infectious Disease Research Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Chyi-Liang Chen
- Department of Microbiology and Immunology, Chang Gung University College of Medicine, Taoyuan, Taiwan; Molecular Infectious Disease Research Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Hsin-Ju Chang
- Molecular Infectious Disease Research Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Tzu-Chun Chuang
- Molecular Infectious Disease Research Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Cheng-Hsun Chiu
- Department of Microbiology and Immunology, Chang Gung University College of Medicine, Taoyuan, Taiwan; Molecular Infectious Disease Research Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan; Division of Pediatric Infectious Diseases, Department of Pediatrics, Chang Gung Children's Hospital, Taoyuan, Taiwan.
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10
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Zhan Q, Teng G, Chen W, Yu X. High prevalence of ST5-SCCmec II-t311 clone of methicillin-resistant Staphylococcus aureus isolated from bloodstream infections in East China. BMC Microbiol 2024; 24:89. [PMID: 38491414 PMCID: PMC10943896 DOI: 10.1186/s12866-024-03232-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Accepted: 02/21/2024] [Indexed: 03/18/2024] Open
Abstract
OBJECTIVES Methicillin-resistant Staphylococcus aureus (MRSA) is a challenging global health threat, resulting in significant morbidity and mortality worldwide. This study aims to determine the molecular characteristics and antimicrobial susceptibility of 263 MRSA isolates in Zhejiang Province, east China. METHODS From 2014 to 2019, a total of 263 MRSA isolates from bloodstream infections (BSIs) were collected from 6 hospitals in 4 cities in Zhejiang province, east China. Antimicrobial susceptibility tests were conducted according to the guidelines set forth by the Clinical and Laboratory Standards Institute (CLSI). To characterize and analyze these isolates, multilocus sequence typing (MLST), staphylococcal cassette chromosome mec (SCCmec) typing, staphylococcal protein A (spa) typing and virulence genes gene profiles were performed. RESULTS The most predominant clone was ST5-SCCmec II-t311, which accounted for 41.8% (110/263), followed by ST59 (44/263, 16.7%). Compared with non-ST5-II-t311 isolates, ST5-II-t311 isolates were more resistant to erythromycin, tetracycline, levofloxacin, moxifloxacin, and ciprofloxacin, but more susceptible to clindamycin. Moreover, the rates of multidrug resistance were higher in ST5-II-t311 isolates compared to the non-ST5-II-t311 isolates. In comparison to the non-ST5-II-t311 isolates, ST5-II-t311 isolates showed no significant difference in virulence genes detected. CONCLUSIONS MRSA ST5-II-t311 clone has become the most predominant clone in Zhejiang Province, east China and has higher rates of multidrug resistance than other isolates, that should be kept in mind when treating BSI. Moreover, MRSA ST59 clone shows an upward trend and has begun to spread into hospitals. Our findings highlight the importance of epidemiological studies of S. aureus carriage in the eastern region.
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Affiliation(s)
- Qing Zhan
- Infection Control Department, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310003, People's Republic of China
| | - Gaoqin Teng
- Department of General Intensive Care Unit, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, 310003, People's Republic of China
| | - Weiwei Chen
- Department of Clinical Laboratory Medicine, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 31000, People's Republic of China.
| | - Xiao Yu
- NHC Key Laboratory of Pneumoconiosis, Shanxi Key Laboratory of Respiratory Diseases, Department of Pulmonary and Critical Care Medicine, The First Hospital of Shanxi Medical University, Taiyuan, 030001, People's Republic of China.
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Osama S, El Sherei M, Al-Mahdy DA, Bishr M, Salama O, Raafat MM. Antimicrobial activity of spiculisporic acid isolated from endophytic fungus Aspergillus cejpii of Hedera helix against MRSA. Braz J Microbiol 2024; 55:515-527. [PMID: 38231376 PMCID: PMC10920557 DOI: 10.1007/s42770-023-01224-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Accepted: 12/14/2023] [Indexed: 01/18/2024] Open
Abstract
The surge in multidrug-resistant pathogens worldwide has jeopardized the clinical efficiency of many current antibiotics. This problem steered many researchers in their quest to discover new effective antimicrobial agents from natural origins including plants or their residing endophytes. In this work, we aimed to identify the endophytic fungi derived from Hedera helix L. and investigate their potential antimicrobial activity. Bioguided fractionation approach was conducted to isolate the pure compounds from the most active fungal fraction. Out of a total of six different isolated endophytic fungal strains, only Aspergillus cejpii showed the highest activity against all tested microbial strains. The most active fraction was the dichloromethane/methanol fraction (DCM:MeOH), where it showed significant activity against Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus, Serratia marcescens, Acinetobacter baumannii, Salmonella typhi, and three drug-resistant clinical isolate strains including Methicillin-resistant Staphylococcus aureus (MRSA, H1), Pseudomonas aeruginosa (PS 16), and Acinetobacter baumannii (ACT 322) using tetracyline and kanamycin as the control antibiotics. Bioguided fractionation of the active fraction led to the isolation of the γ-butenolide, spiculisporic acid. Structure elucidation was carried out using 1H and 13C-NMR spectroscopic analysis. The compound showed good antimicrobial activities with minimum inhibitory concentration (MIC) values ranging from 3.9 to 31.25 μg/mL against all tested strains. Gas chromatography coupled to mass spectrometry (GC-MS) profiling was also carried out to identify the metabolites in the microbial crude extract. In conclusion, endophytic fungi, Aspergillus cejpii, isolated from Hedera helix L. roots showed promising antimicrobial activity which merits further in-depth investigations for potential utilization as a source of new antibiotics in the future. It can also be considered as a novel source for spiculisporic acid.
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Affiliation(s)
- Sarah Osama
- Pharmacognosy and Medicinal Plants Department, Faculty of Pharmacy, Future University in Egypt, Cairo, Egypt.
| | - Moshera El Sherei
- Department of Pharmacognosy, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | - Dalia A Al-Mahdy
- Department of Pharmacognosy, Faculty of Pharmacy, Cairo University, Cairo, Egypt.
- Department of Pharmacognosy, Faculty of Pharmacy, Modern University for Technology and Information (MTI), Cairo, Egypt.
| | - Mokhtar Bishr
- Arab Company for Pharmaceuticals and Medicinal Plants (Mepaco), Cairo, Egypt
| | - Osama Salama
- Pharmacognosy and Medicinal Plants Department, Faculty of Pharmacy, Future University in Egypt, Cairo, Egypt
| | - Marwa M Raafat
- Microbiology and Immunology Department, Faculty of Pharmacy, Future University in Egypt, Cairo, 11835, Egypt
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Kim M, Heo ST, Lee J, Lee JH, Kim M, Kim C, Seong GM, Kang MJ, Yoo JR. Identification and Antimicrobial Susceptibilities for Patients with Non-tuberculous Mycobacteria Infection in Jeju Island: Single-Center Retrospective Study. Infect Chemother 2024; 56:13-24. [PMID: 37674341 PMCID: PMC10990891 DOI: 10.3947/ic.2023.0052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2023] [Accepted: 07/21/2023] [Indexed: 09/08/2023] Open
Abstract
BACKGROUND The distribution of species and characteristics of non-tuberculous mycobacteria (NTM) differ, and surveillance data for changes in antimicrobial susceptibilities of NTM is insufficient. This study analyzed the changes in antimicrobial susceptibility trends across NTM species and assessed the appropriateness of empirical antimicrobial drugs for NTM. MATERIALS AND METHODS We retrospectively analyzed the clinical characteristics, including demographics, distribution of NTM species, antimicrobial drug susceptibilities, and outcomes, at a teaching hospital in Jeju Island from 2009 - 2022. RESULTS Overall, 342 patients were included in the analysis; 93.0% were classified into the pulmonary group (PG) and 7.0% into the extrapulmonary group (EPG). The isolation rate of Mycobacterium avium was significantly higher in PG (36.8% vs. 0%, P = 0.001), while that of Mycobacterium fortuitum was significantly higher in EPG (4.5% vs. 31.3%, P = 0.001). The antimicrobial susceptibility rate is higher against clarithromycin (89.9%) and amikacin (83.3%) and lower against rifampin (54.7%) and ethambutol (28.1%). The susceptibility rate to clarithromycin was over 80%, but those to rifampin and ethambutol showed decreasing annual trends. Of the 162 patients who received empirical antimicrobial therapy, actual antimicrobial susceptibility rates were high (90.1%) using empirical macrolide, and relatively low using ethambutol and rifampin (28.0% and 58.8%, respectively). CONCLUSION This is the first study of analysis of the distribution, baseline characteristics, and antimicrobial susceptibility of isolated NTM species in pulmonary and extrapulmonary patients in Jeju Island over 10 years. Policies that continuously monitor changes in susceptibility rate are required to ensure effective treatment strategies.
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Affiliation(s)
- Misun Kim
- Department of Internal Medicine, Jeju National University Hospital, Jeju, Korea
- Department of Internal Medicine, Jeju National University, College of Medicine, Jeju, Korea
| | - Sang Taek Heo
- Department of Internal Medicine, Jeju National University Hospital, Jeju, Korea
- Department of Internal Medicine, Jeju National University, College of Medicine, Jeju, Korea
| | - Jaechun Lee
- Department of Internal Medicine, Jeju National University Hospital, Jeju, Korea
- Department of Internal Medicine, Jeju National University, College of Medicine, Jeju, Korea
| | - Jong Hoo Lee
- Department of Internal Medicine, Jeju National University Hospital, Jeju, Korea
- Department of Internal Medicine, Jeju National University, College of Medicine, Jeju, Korea
| | - Miok Kim
- Department of Internal Medicine, Jeju National University Hospital, Jeju, Korea
- Department of Internal Medicine, Jeju National University, College of Medicine, Jeju, Korea
| | - Changhwan Kim
- Department of Internal Medicine, Jeju National University Hospital, Jeju, Korea
- Department of Internal Medicine, Jeju National University, College of Medicine, Jeju, Korea
| | - Gil Myeong Seong
- Department of Internal Medicine, Jeju National University Hospital, Jeju, Korea
| | - Myeong Jin Kang
- Department of Nursing, Jeju National University Hospital, Jeju, Korea
| | - Jeong Rae Yoo
- Department of Internal Medicine, Jeju National University Hospital, Jeju, Korea
- Department of Internal Medicine, Jeju National University, College of Medicine, Jeju, Korea.
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Huda NU, Sohail M, Mirani ZA, Hyder QUA, Khan S. Source tracking of extensively drug resistant Salmonella Typhi in food and raw vegetables using molecular approaches. J Infect Dev Ctries 2024; 18:227-234. [PMID: 38484341 DOI: 10.3855/jidc.18289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Accepted: 08/07/2023] [Indexed: 03/19/2024] Open
Abstract
INTRODUCTION Extensively drug resistant (XDR) strains of the Salmonella lineages have been reported to spread from Africa to South Asia. XDR strains are resistant to fluoroquinolones, chloramphenicol, co-trimoxazole, and ampicillin, resulting in treatment failure. The objectives of this study included the investigation of transmission of S. Typhi lineages and the identification of the potentially contaminated sources of the XDR typhoid outbreak from different urban areas by using molecular techniques. METHODOLOGY Environmental samples, including food samples, were collected from different towns and the susceptibility of each isolate to the antimicrobial agents was examined. Molecular identification of different Salmonella lineages including S. Typhi, S. Paratyphi A, H58, and XDR was carried out through multiplex PCR. RESULTS AND CONCLUSIONS A total of 328 environmental samples including raw vegetables, water, and bakery items were collected. More than half of the tested samples (64%) found harboring Salmonella spp. The Salmonella was confirmed through PCR amplification of species-specific markers that showed the presence of S. Typhi (40%), S. Paratyphi A (8%), H58 (7%), and XDR S. Typhi (6%). Raw vegetables had the highest number of Salmonella spp., indicating consumption of raw vegetables as a possible source of salmonellosis. XDR status was also affirmed through phenotypic antimicrobial susceptibility testing.
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Affiliation(s)
- Noor Ul Huda
- Department of Pathology, Dow University of Health Sciences, Karachi, Pakistan
| | - Muhammad Sohail
- Department of Microbiology, University of Karachi, Karachi-75270, Pakistan
| | - Zulfiqar Ali Mirani
- Food and Marine Resources Research Centre, Pakistan Council for Scientific and Industrial Research Laboratories Complex, Karachi-75280, Pakistan
| | - Qurat Ul Ain Hyder
- Department of Pathology, Dow University of Health Sciences, Karachi, Pakistan
| | - Saeed Khan
- Department of Pathology, Dow University of Health Sciences, Karachi, Pakistan
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Tang Y, Xiao N, Zou J, Mei Y, Yuan Y, Wang M, Wang Z, Zhou Y, Chen Y, Li S. Antibiotic resistance, biofilm formation, and molecular epidemiology of Staphylococcus aureus in a tertiary hospital in Xiangyang, China. Braz J Microbiol 2024:10.1007/s42770-024-01270-9. [PMID: 38366298 DOI: 10.1007/s42770-024-01270-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Accepted: 02/02/2024] [Indexed: 02/18/2024] Open
Abstract
Staphylococcus aureus is a common clinical pathogen that causes various human infections. The aim of this study was to investigate the antibiotic susceptibility pattern, molecular epidemiological characteristics, and biofilm formation ability of S. aureus isolates from clinical specimens in Xiangyang and to analyze the correlation among them. A total of 111 non-duplicate S. aureus isolates were collected from the Affiliated Hospital of Hubei University of Arts and Science. All isolates were tested for antibacterial susceptibility. Methicillin-resistant S. aureus (MRSA) was identified by the mecA gene PCR amplification. All isolates were analyzed to determine their biofilm-forming ability using the microplate method. The biofilm-related gene was determined using PCR. SCCmec, MLST, and spa types of MRSA strains were performed to ascertain the molecular characteristics. Among the 111 S. aureus isolates, 45 (40.5%) and 66 (59.5%) were MRSA and MSSA, respectively. The resistance of MRSA strains to the tested antibiotics was significantly stronger than that of MSSA strains. All isolates were able to produce biofilm with levels ranging from strong (28.9%, 18.2%), moderate (62.2%, 62.1%), to weak (8.9%, 19.7%). Strong biofilm formation was observed in MRSA strains than in MSSA strains, based on percentages. There were dynamic changes in molecular epidemic characteristics of MRSA isolates in Xiangyang. SCCmecIVa-ST22-t309, SCCmecIVa-ST59-t437, and SCCmecIVa-ST5-t2460 were currently the main epidemic clones in this region. SCCmecIVa-ST5-t2460 and SCCmecIVa/III-ST22-t309 have stronger antibiotic resistance than SCCmecIVa-ST59-t437 strains, with resistance to 6 ~ 8 detected non-β-lactam antibiotics. The molecular epidemic and resistance attributes of S. aureus should be timely monitored, and effective measures should be adopted to control the clinical infection and spread of the bacteria.
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Affiliation(s)
- Yitong Tang
- Medical College, Hubei University of Arts and Science, Xiangyang, 441053, China
| | - Na Xiao
- Medical College, Hubei University of Arts and Science, Xiangyang, 441053, China
| | - JiuMing Zou
- Xiangyang Central Hospital, The Affiliated Hospital of Hubei University of Arts and Science, Xiangyang, 441021, China
| | - Yuling Mei
- Medical College, Hubei University of Arts and Science, Xiangyang, 441053, China
| | - Yue Yuan
- Medical College, Hubei University of Arts and Science, Xiangyang, 441053, China
| | - Menghuan Wang
- Medical College, Hubei University of Arts and Science, Xiangyang, 441053, China
| | - Zezhou Wang
- Medical College, Hubei University of Arts and Science, Xiangyang, 441053, China
| | - Yunjuan Zhou
- Medical College, Hubei University of Arts and Science, Xiangyang, 441053, China
| | - Yiyuan Chen
- Medical College, Hubei University of Arts and Science, Xiangyang, 441053, China
| | - Shichao Li
- Xiangyang Central Hospital, The Affiliated Hospital of Hubei University of Arts and Science, Xiangyang, 441021, China.
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Berihu T, Gebremariam G, Weldu Y, Kahsay A, Asmelash T, Gebreyesus A. Prevalence, antimicrobial susceptibility test and associated factors of Salmonella and Shigella in ready-to-eat fruit juices and salads in Mekelle, northern Ethiopia. BMC Infect Dis 2024; 24:191. [PMID: 38350855 PMCID: PMC10863215 DOI: 10.1186/s12879-024-09066-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Accepted: 01/28/2024] [Indexed: 02/15/2024] Open
Abstract
BACKGROUND Food borne diseases is a challenging problem nowadays. Salmonella and Shigella species are great concern of food-born outbreaks. Thus, this study was aimed to assess the prevalence, antimicrobial susceptibility test and associated factors of Salmonella and Shigella species in fruit juices and salads. METHODS A community based cross sectional study design was carried out on 50 juice houses from December to March 2020 in Mekelle. One hundred fifty samples were collected aseptically from the juice houses for laboratory analysis. Information related to risk factors was obtained using a structured questionnaire. In the laboratory, samples were homogenized using peptone water and incubated overnight for enrichment. Then, Salmonella and Shigella species were isolated on Salmonella-Shigella agar and Xylose Lysine Deoxycholate agar. Disc diffusion method was used to perform antimicrobial susceptibility test. Using SPSS (version 22) package, descriptive statistics and Chi square test (χ2) were used to analyze the data, and p < 0.05 was considered as statistically significant. RESULT The overall prevalence of Salmonella and Shigella species was 41/150 (27.33%; 95% CI: 20.20 - 34.46) with 33 (22%) Salmonella spp. and 8(5.33%) Shigella spp. Antimicrobial susceptibility tests of both Salmonella and Shigella spp.showed high resistance against ampicillin (100%), tetracycline (63.6 and 62.5%, respectively) and amoxicillin-clavulanic acid (100%). Accessibility of fruits to flies and dust had statistical association (p = 0.021) with occurrence of Salmonell a and/or Shigella spp. CONCLUSION The overall prevalence of Salmonella and Shigella spp. was found to be significant. The resistant rate of isolates against ampicillin, tetracycline and amoxicillin-clavulanic acid was high. Storage sites for fruits should be inaccessible to flies and dust. Therefore, routine monitoring of juice houses should be promoted and regular evaluation of bacterial resistance pattern should be done for selective antimicrobial therapy. Furthermore, consistent training of juice makers on food safety and hygiene should be implemented by the concerned body.
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Affiliation(s)
- Tesfay Berihu
- Department of Medical Laboratory Science, College of Health Science and Comprehensive Specialized Hospital, Aksum University, Axum, Tigray, Ethiopia
| | - Guesh Gebremariam
- Department of Medical Laboratory Science, College of Health Science and Comprehensive Specialized Hospital, Aksum University, Axum, Tigray, Ethiopia.
| | - Yemane Weldu
- Department of Medical Microbiology and Immunology, College of Health Science and Comprehensive Specialized Hospital, Mekelle University, Mekelle, Tigray, Ethiopia
| | - Amlsha Kahsay
- Department of Medical Microbiology and Immunology, College of Health Science and Comprehensive Specialized Hospital, Mekelle University, Mekelle, Tigray, Ethiopia
| | - Tsehaye Asmelash
- Department of Medical Microbiology and Immunology, College of Health Science and Comprehensive Specialized Hospital, Mekelle University, Mekelle, Tigray, Ethiopia
| | - Araya Gebreyesus
- Department of Medical Microbiology and Immunology, College of Health Science and Comprehensive Specialized Hospital, Mekelle University, Mekelle, Tigray, Ethiopia
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Tian X, Sun H, Huang Y, Sui W, Zhang D, Sun Y, Jin J, He Y, Lu X. Microbiological isolates and associated complications of dacryocystitis and canaliculitis in a prominent tertiary ophthalmic teaching hospital in northern China. BMC Ophthalmol 2024; 24:56. [PMID: 38317063 PMCID: PMC10840201 DOI: 10.1186/s12886-024-03323-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Accepted: 01/23/2024] [Indexed: 02/07/2024] Open
Abstract
BACKGROUND To report the microbiological isolates, aetiology, complications, antibiotic susceptibilities, and clinical remission of dacryocystitis and canaliculitis in a prominent tertiary ophthalmic teaching and referral hospital located in northern China and to offer appropriate recommendations for preventing and formulating drug treatment strategies. METHODS This prospective study recruited a total of 477 participants who had been diagnosed with either dacryocystitis or canaliculitis. The cohort comprised 307 patients with chronic dacryocystitis, 111 patients with acute dacryocystitis, and 59 patients with canaliculitis. Purulent discharge from the lacrimal duct was collected using a sterile swab and immediately subjected to microbial culture. Antimicrobial susceptibility testing was conducted following established protocols. All participants were scheduled for follow-up visits within 14 days after receiving antibiotic therapy. RESULTS The present findings indicated that women exhibited a higher susceptibility to the condition, as evidenced by the occurrence of 367 cases in comparison to 110 cases among men. Among the 477 patients, definitive causes were established in 59 individuals, accounting for 12.4% of the patients. Additionally, ocular complications were reported by 132 patients, representing 27.7% of the total. Monocular involvement was observed in the majority of cases, with 402 out of 477 patients (84.3%) affected, while binocular involvement was present in 75 patients (15.7%). In total, 506 microbiological strains were recovered from 552 eyes, with Staphylococcus epidermidis (16.4%) being the most prevalent microorganism. Other predominant isolates included Corynebacterium macginleyi (9.1%), Staphylococcus aureus (5.1%), Streptococcus pneumoniae (4.9%), Haemophilus (4.4%), Propionibacterium acnes (3.5%), and Eikenella corrodens (3.1%). Among the 12 isolated fungi, Candida parapsilosis accounted for 66.7%. The susceptibility to antimicrobial agents tested in gram-negative bacilli (79.5%) was observed to be higher than that of anaerobic bacteria (76.7%) and gram-positive cocci (55.4%). With pharmacological therapy, the remission rate of acute dacryocystitis (72.7%) was found to be higher than that of canaliculitis (53.3%) and chronic dacryocystitis (42.3%). CONCLUSIONS This study highlights the microbial spectrum of dacryocystitis and canaliculitis, particularly C.macginleyi, E.corrodens and C.parapsilosis, which are also more frequently isolated. Vancomycin and imipenem may be more effective treatment options. Most cases have an unknown aetiology, and essential preventive measures involve postoperative cleansing of the lacrimal passage following eye and nasal surgeries, as well as the proactive management of rhinitis.
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Affiliation(s)
- Xiaobo Tian
- Department of Laboratory Medicine, Beijing Tongren Hospital, Capital Medical University, Beijing, 100176, China
| | - Hua Sun
- Department of Ophthalmology, Beijing Tongren Hospital, Capital Medical University, Beijing, 100176, China
| | - Yanfei Huang
- Department of Laboratory Medicine, Beijing Tongren Hospital, Capital Medical University, Beijing, 100176, China
| | - Wenjun Sui
- Department of Laboratory Medicine, Beijing Tongren Hospital, Capital Medical University, Beijing, 100176, China
| | - Dan Zhang
- Department of Laboratory Medicine, Beijing Tongren Hospital, Capital Medical University, Beijing, 100176, China
| | - Yufeng Sun
- Department of Laboratory Medicine, Beijing Tongren Hospital, Capital Medical University, Beijing, 100176, China
| | - Jing Jin
- Department of Laboratory Medicine, Beijing Tongren Hospital, Capital Medical University, Beijing, 100176, China
| | - Yueqing He
- Department of Ophthalmology, Beijing Tongren Hospital, Capital Medical University, Beijing, 100176, China
| | - Xinxin Lu
- Department of Laboratory Medicine, Beijing Tongren Hospital, Capital Medical University, Beijing, 100176, China.
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Suryawanshi VR, Pawar A, Purandare B, Vijayvargiya N, Sancheti S, Philip S, Nagare P. Microbial Profile, Antimicrobial Susceptibility, and Prevalence of MDR/XDR Pathogens Causing Medical Device Associated Infections: A Single Center Study. Indian J Crit Care Med 2024; 28:152-164. [PMID: 38323246 PMCID: PMC10839921 DOI: 10.5005/jp-journals-10071-24623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Accepted: 12/04/2023] [Indexed: 02/08/2024] Open
Abstract
Background There is a scarcity of studies evaluating the microbial profile, antimicrobial susceptibility, and prevalence of MDR/XDR pathogens causing medical device-associated infections (MDAIs). The present study was sought in this regard. Materials and methods An ambispective-observational, site-specific, surveillance-based study was performed for a period of 2 years in the intensive care unit (ICU) and high dependency unit (HDU) (medicine/surgery) of a Tertiary-care University Hospital. Three commonly encountered MDAIs including central-line-associated bloodstream infections (CLABSI), catheter-associated urinary tract infections (CAUTI), and ventilator-associated pneumonia (VAP), were targeted. Results and conclusion Of the total 90 patients, 46 (51.1%) were admitted to the ICU (medicine/surgery), and the remaining 44 (48.8%) were admitted to the HDU (medicine/surgery). The median (P25-P75) age of the total patients was 55 (43.1-62.3) years. Male 61 (67.8%) preponderance was observed. Sixty-two of 90 (68.9%) were immunocompromised. A total of 104 pathogens causing MDAIs were isolated. Staphylococcus epidermidis (CoNS), and Staphylococcus capitis were commonly isolated multi-drug resistant (MDR) gram-positive pathogens causing MDAIs. Similarly, carba-resistant Klebsiella pneumoniae, Stenotrophomonas maltophilia, and carba-resistant Acinetobacter baumanni were commonly isolated MDR gram-negative pathogens causing MDAIs. Five of 9 (55.5%) K. pneumoniae and three of 9 (33.3%) S. maltophilia isolates were found to be extensively drug resistant. Among Candida, C. parapsilosis was the most prevalent fungal pathogen causing CLABSI and CAUTI in patients admitted to ICU/HDU. How to cite this article Suryawanshi VR, Pawar A, Purandare B, Vijayvargiya N, Sancheti S, Philip S, et al. Microbial Profile, Antimicrobial Susceptibility, and Prevalence of MDR/XDR Pathogens Causing Medical Device Associated Infections: A Single Center Study. Indian J Crit Care Med 2024;28(2):152-164.
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Affiliation(s)
- Vaibhav R Suryawanshi
- Department of Pharmacy Practice, Bharati Vidyapeeth (Deemed to be University), Poona College of Pharmacy, BVDU Katraj Campus, Pune, Maharashtra, India
| | - Atmaram Pawar
- Department of Pharmaceutics, Bharati Vidyapeeth (Deemed to be University), Poona College of Pharmacy, Pune, Maharashtra, India
| | - Bharat Purandare
- Department of Infectious Diseases, Bharati Vidyapeeth (Deemed to be University) Medical College, Pune, Maharashtra, India
| | - Niveda Vijayvargiya
- Department of Pharmacy Practice, Bharati Vidyapeeth (Deemed to be University), Poona College of Pharmacy, BVDU Katraj Campus, Pune, Maharashtra, India
| | - Sandesh Sancheti
- Department of Pharmacy Practice, Bharati Vidyapeeth (Deemed to be University), Poona College of Pharmacy, BVDU Katraj Campus, Pune, Maharashtra, India
| | - Susan Philip
- Department of Pharmacy Practice, Bharati Vidyapeeth (Deemed to be University), Poona College of Pharmacy, BVDU Katraj Campus, Pune, Maharashtra, India
| | - Prasad Nagare
- Department of Pharmacy Practice, Bharati Vidyapeeth (Deemed to be University), Poona College of Pharmacy, BVDU Katraj Campus, Pune, Maharashtra, India
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Watanabe N, Watari T, Otsuka Y, Hosokawa N, Yamagata K, Fujioka M. Clinical and microbiological characteristics of Ruminococcus gnavus bacteremia and intra-abdominal infection. Anaerobe 2024; 85:102818. [PMID: 38211774 DOI: 10.1016/j.anaerobe.2024.102818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 01/04/2024] [Accepted: 01/06/2024] [Indexed: 01/13/2024]
Abstract
OBJECTIVES Ruminococcus gnavus is a rare human pathogen, and clinical data on R. gnavus infection are insufficient. This retrospective study aimed to investigate the clinical characteristics of R. gnavus infections. METHODS This study included 13 cases of bacteremia and three cases of non-bacteremia infections caused by R. gnavus. We evaluated the patient data, infection source, clinical outcomes, and antimicrobial susceptibility of R. gnavus isolates for these cases. RESULTS The median age of patients was 75 years (range 47-95), and eight patients were female. Twelve cases were presumed to have an intra-abdominal infection source, and the remaining four cases had an unknown infection source. The most common underlying conditions were immunosuppression (seven cases), solid tumors (seven cases), and history of gastrointestinal surgery (five cases). Thirteen patients exhibited gastrointestinal problems (dysfunction, bleeding, intra-abdominal infection, or inflammation). Multiple pathogens were observed in six cases, and fatal outcomes were recorded in three cases. Antimicrobial susceptibility data were available for eight isolates, all of which exhibited low minimum inhibitory concentrations to penicillin (≤0.03 μg/mL), ampicillin-sulbactam (≤0.5 μg/mL), piperacillin-tazobactam (≤4 μg/mL), and metronidazole (≤0.5-1 μg/mL). CONCLUSION Ruminococcus gnavus is frequently associated with an intra-abdominal infection source, and treatment strategies should consider the possibility of multiple pathogens.
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Affiliation(s)
- Naoki Watanabe
- Department of Clinical Laboratory, Kameda Medical Center, Higashi-cho 929, Kamogawa, Chiba, Japan; Graduate School of Health Sciences, Hirosaki University, Hon-cho 66-1, Hirosaki, Aomori, Japan.
| | - Tomohisa Watari
- Department of Clinical Laboratory, Kameda Medical Center, Higashi-cho 929, Kamogawa, Chiba, Japan.
| | - Yoshihito Otsuka
- Department of Clinical Laboratory, Kameda Medical Center, Higashi-cho 929, Kamogawa, Chiba, Japan.
| | - Naoto Hosokawa
- Department of Infectious Diseases, Kameda Medical Center, Higashi-cho 929, Kamogawa, Chiba, Japan.
| | - Kazufumi Yamagata
- Graduate School of Health Sciences, Hirosaki University, Hon-cho 66-1, Hirosaki, Aomori, Japan.
| | - Miyuki Fujioka
- Graduate School of Health Sciences, Hirosaki University, Hon-cho 66-1, Hirosaki, Aomori, Japan.
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Cobo F, Franco-Acosta A, Martín-Hita L, Rodríguez-Granger J, Sampedro-Martínez A, Reguera-Márquez JA, Navarro-Marí JM. In vitro activity of delafloxacin against anaerobic bacteria compared with other antimicrobials. Anaerobe 2024; 85:102816. [PMID: 38145709 DOI: 10.1016/j.anaerobe.2023.102816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2023] [Revised: 12/11/2023] [Accepted: 12/21/2023] [Indexed: 12/27/2023]
Abstract
The aim of this study was to describe the in vitro activity of delafloxacin against 230 anaerobic isolates and compare it with the activity of other antimicrobials used against infections caused by anaerobic microorganisms. Minimal inhibitory concentrations (MICs) were lower for delafloxacin than for all other antibiotics tested with the exception of piperacillin-tazobactam and meropenem against Gram-positive anaerobic cocci. Only two (0.8 %) isolates of Bacteroides spp. showed a MIC ≥4 μg/mL. With some exceptions, the present results show lower MICs for delafloxacin in comparison to the other antibiotics used against anaerobes.
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Affiliation(s)
- Fernando Cobo
- Department of Microbiology and Instituto de Investigación Biosanitaria Ibs.GRANADA, University Hospital Virgen de las Nieves, Granada, Spain.
| | - Ana Franco-Acosta
- Department of Microbiology and Instituto de Investigación Biosanitaria Ibs.GRANADA, University Hospital Virgen de las Nieves, Granada, Spain
| | - Lina Martín-Hita
- Department of Microbiology and Instituto de Investigación Biosanitaria Ibs.GRANADA, University Hospital Virgen de las Nieves, Granada, Spain
| | - Javier Rodríguez-Granger
- Department of Microbiology and Instituto de Investigación Biosanitaria Ibs.GRANADA, University Hospital Virgen de las Nieves, Granada, Spain
| | - Antonio Sampedro-Martínez
- Department of Microbiology and Instituto de Investigación Biosanitaria Ibs.GRANADA, University Hospital Virgen de las Nieves, Granada, Spain
| | - Juan Antonio Reguera-Márquez
- Department of Microbiology and Instituto de Investigación Biosanitaria Ibs.GRANADA, University Hospital Virgen de las Nieves, Granada, Spain
| | - José María Navarro-Marí
- Department of Microbiology and Instituto de Investigación Biosanitaria Ibs.GRANADA, University Hospital Virgen de las Nieves, Granada, Spain
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20
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Jünger C, Imkamp F, Balakrishna S, Gysin M, Haldimann K, Brugger SD, Scheier TC, Hampel B, Hobbie SN, Günthard HF, Braun DL. Phenotypic and genotypic characterization of Neisseria gonorrhoeae isolates among individuals at high risk for sexually transmitted diseases in Zurich, Switzerland. Int J STD AIDS 2024:9564624241230266. [PMID: 38297880 DOI: 10.1177/09564624241230266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2024]
Abstract
BACKGROUND While ceftriaxone resistance remains scarce in Switzerland, global Neisseria gonorrhoeae (NG) antimicrobial resistance poses an urgent threat. This study describes clinical characteristics in MSM (men who have sex with men) diagnosed with NG infection and analyses NG resistance by phenotypic and genotypic means. METHODS Data of MSM enrolled in three clinical cohorts with a positive polymerase chain reaction test (PCR) for NG were analysed between January 2019 and December 2021 and linked with antibiotic susceptibility testing. Bacterial isolates were subjected to whole genome sequencing (WGS). RESULTS Of 142 participants, 141 (99%) were MSM and 118 (84%) living with HIV. Participants were treated with ceftriaxone (N = 79), azithromycin (N = 2), or a combination of both (N = 61). No clinical or microbiological failures were observed. From 182 positive PCR samples taken, 23 were available for detailed analysis. Based on minimal inhibitory concentrations (MICs), all isolates were susceptible to ceftriaxone, gentamicin, cefixime, cefpodoxime, ertapenem, zoliflodacin, and spectinomycin. Resistance to azithromycin, tetracyclines and ciprofloxacin was observed in 10 (43%), 23 (100%) and 11 (48%) of the cases, respectively. Analysis of WGS data revealed combinations of resistance determinants that matched with the corresponding phenotypic resistance pattern of each isolate. CONCLUSION Among the MSM diagnosed with NG mainly acquired in Switzerland, ceftriaxone MICs were low for a subset of bacterial isolates studied and no treatment failures were observed. For azithromycin, high occurrences of in vitro resistance were found. Gentamicin, cefixime, cefpodoxime, ertapenem, spectinomycin, and zoliflodacin displayed excellent in vitro activity against the 23 isolates underscoring their potential as alternative agents to ceftriaxone.
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Affiliation(s)
- Christian Jünger
- Department of Infectious Diseases and Hospital Epidemiology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Frank Imkamp
- Institute of Medical Microbiology, University of Zurich, Zurich, Switzerland
| | - Suraj Balakrishna
- Department of Infectious Diseases and Hospital Epidemiology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Marina Gysin
- Institute of Medical Microbiology, University of Zurich, Zurich, Switzerland
| | - Klara Haldimann
- Institute of Medical Microbiology, University of Zurich, Zurich, Switzerland
| | - Silvio D Brugger
- Department of Infectious Diseases and Hospital Epidemiology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Thomas C Scheier
- Department of Infectious Diseases and Hospital Epidemiology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | | | - Sven N Hobbie
- Institute of Medical Microbiology, University of Zurich, Zurich, Switzerland
| | - Huldrych F Günthard
- Department of Infectious Diseases and Hospital Epidemiology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Dominique L Braun
- Department of Infectious Diseases and Hospital Epidemiology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
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21
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Xin R, Zhang Y, Zhang K, Yang Y, Ma Y, Niu Z. Investigation of the antimicrobial susceptibility patterns of marine cyanobacteria in Bohai Bay: Cyanobacteria may be important hosts of antibiotic resistance genes in marine environment. Sci Total Environ 2024; 909:168516. [PMID: 37972772 DOI: 10.1016/j.scitotenv.2023.168516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 11/09/2023] [Accepted: 11/10/2023] [Indexed: 11/19/2023]
Abstract
Marine cyanobacteria, as widely distributed and photosynthetically autotrophic bacteria in the ocean, may contribute to the global dissemination of antibiotic resistance genes (ARGs) and develop a different antimicrobial susceptibility pattern from heterotrophic bacteria and cyanobacteria from freshwater environments. However, studies on antimicrobial susceptibility and the carriage of ARGs in marine cyanobacteria are still very limited. In this study, the antibiotic resistance characteristics of cyanobacteria in nearshore waters were examined through field monitoring and laboratory investigations, which included PCR detection and ARG transformation. The results showed a positive correlation between marine cyanobacteria and some ARGs in the nearshore waters of Bohai Bay. Moreover, most screened cyanobacteria showed high minimum inhibitory concentration (MIC) values for polymyxins, tetracyclines, kanamycin, and sulfonamides, moderate MIC values for streptomycin, chloramphenicol, rifampicin, and norfloxacin, and low MIC values for roxithromycin and cephalosporins. The blaTEM, blaKPC, sul1, sul2, strA, tetA, tetB, tetC, tetM, mdfA, and intI1 genes were detected in the screened marine cyanobacteria. The highest detection rates were observed for blaTEM (93.3 %), sul1 (56.6 %), sul2 (90 %), and strA (73.3 %). The detection rate of tetA (33.3 %) was the highest among the tetracycline resistance genes, and mdfA, a multidrug-resistant pump gene with resistance to tetracycline, also showed a high detection level (23.3 %). Overall, most of the screened marine cyanobacteria were found to tolerate multiple antibiotics in seawater, and the condition of the ARGs carriage was serious. Furthermore, the screened marine Synechocystis sp. C12-2 demonstrated the ability to accept ARGs on the RP4 plasmid through natural transformation and showed reduced sensitivity to ampicillin, suggesting the possibility that some marine cyanobacteria could acquire ARGs from the environment through horizontal gene transfer. Thus, marine cyanobacteria may play an important role in the propagation of marine ARGs.
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Affiliation(s)
- Rui Xin
- School of Marine Science and Technology, Tianjin University, Tianjin 300072, China
| | - Ying Zhang
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China
| | - Kai Zhang
- Henan Key Laboratory for Synergistic Prevention of Water and Soil Environmental Pollution, School of Geographic Sciences, Xinyang Normal University, Xinyang 464000, China
| | - Yichen Yang
- School of Marine Science and Technology, Tianjin University, Tianjin 300072, China
| | - Yongzheng Ma
- School of Marine Science and Technology, Tianjin University, Tianjin 300072, China.
| | - Zhiguang Niu
- School of Marine Science and Technology, Tianjin University, Tianjin 300072, China; The International Joint Institute of Tianjin University, Fuzhou 350207, China.
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Vaja M, Chokshi H, Jansari J, Dixit O, Savaliya S, Patel D, Patel F. Study of Antimicrobial Resistance (AMR) in Shigella SPP. in India. Recent Adv Antiinfect Drug Discov 2024; 19:RAAIDD-EPUB-136918. [PMID: 38317464 DOI: 10.2174/0127724344268156231129095108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 11/11/2023] [Accepted: 11/20/2023] [Indexed: 02/07/2024]
Abstract
Antimicrobial agents are essential in reducing illness and mortality brought on by infectious diseases in both humans and animals. However, the therapeutic effect of antibiotics has diminished due to an increase in antimicrobial drug resistance (AMR). This article provides a retrospective analysis of AMR in Shigella infections in India, showing a rise in resistance that has contributed to a global burden. Shigella spp.are widespread and the second-leading cause of diarrheal death in people of all ages. The frequency and mortality rates of Shigella infections are decreased by antibiotic treatment. However, the growth of broad-spectrum antibiotic resistance is making it more difficult to treat many illnesses. Reduced cell permeability, efflux pumps, and the presence of enzymes that break down antibiotics are the causes of resistance. AMR is a multifaceted and cross-sectoral problem that affects humans, animals, food, and the environment. As a result, there is a growing need for new therapeutic approaches, and ongoing surveillance of Shigella spp. infections which should definitely be improved for disease prevention and management. This review emphasizes on the epidemiological data of India, and antimicrobial resistance in Shigella spp.
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Affiliation(s)
- Maulikkumar Vaja
- Department of Pharmaceutical Chemistry, Saraswati Institute of Pharmaceutical Sciences, Near Hotel Anjali Inn, Dhanap, India
| | - Heenaben Chokshi
- Department of Pharmacology and Pharmacy Practice, Saraswati Institute of Pharmaceutical Sciences, Near Hotel Anjali Inn, Dhanap, India
| | - Janak Jansari
- Department of Pharmacology and Pharmacy Practice, Saraswati Institute of Pharmaceutical Sciences, Near Hotel Anjali Inn, Dhanap, India
| | - Om Dixit
- Department of Pharmacology and Pharmacy Practice, Saraswati Institute of Pharmaceutical Sciences, Near Hotel Anjali Inn, Dhanap, India
| | - Shubham Savaliya
- Department of Pharmacology and Pharmacy Practice, Saraswati Institute of Pharmaceutical Sciences, Near Hotel Anjali Inn, Dhanap, India
| | - Deepak Patel
- Department of Pharmacology and Pharmacy Practice, Saraswati Institute of Pharmaceutical Sciences, Near Hotel Anjali Inn, Dhanap, India
| | - Fenil Patel
- Department of Pharmacology and Pharmacy Practice, Saraswati Institute of Pharmaceutical Sciences, Near Hotel Anjali Inn, Dhanap, India
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Nagel OG, Gasparotti ML, Machado SI, Althaus RL. Similarities of Geobacillus bacteria based on their profiles of antimicrobial susceptibility in milk samples. Rev Argent Microbiol 2024; 56:102-111. [PMID: 37704517 DOI: 10.1016/j.ram.2023.07.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 05/29/2023] [Accepted: 07/03/2023] [Indexed: 09/15/2023] Open
Abstract
The genus Geobacillus is composed of thermophilic bacteria that exhibit diverse biotechnological potentialities. Specifically, Geobacillus stearothermophilus is included as a test bacterium in commercial microbiological inhibition methods, although it exhibits limited sensitivity to aminoglycosides, macrolides, and quinolones. Therefore, this article evaluates the antibiotic susceptibility profiles of five test bacteria (G. stearothermophilus subsp. calidolactis C953, Geobacillus thermocatenulatus LMG 19007, Geobacillus thermoleovorans LMG 9823, Geobacillus kaustophilus DSM 7263 and Geobacillus vulcani 13174). For that purpose, the minimum inhibitory concentrations (MICs) of 21 antibiotics were determined in milk samples for five test bacteria using the radial diffusion microbiological inhibition method. Subsequently, the similarities between bacteria and antibiotics were analyzed using cluster analysis. The dendrogram of this multivariate analysis shows an association between a group formed by G. thermocatenulatus and G. stearothermophilus and another by G. thermoleovorans, G. kaustophilus and G. vulcani. Finally, future microbiological methods could be developed in microtiter plates using G. thermocatenulatus as test bacterium, as it exhibits similar sensitivities to G. stearothermophilus. Conversely, G. vulcani, G. thermoleovorans and G. kaustophilus show higher MICs than G. thermocatenulatus.
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Affiliation(s)
- Orlando G Nagel
- Facultad de Ciencias Veterinarias, Universidad Nacional del Litoral, R.P.L. Kreder 2805, 3080 Esperanza, Argentina
| | - Maria L Gasparotti
- Facultad de Ciencias Veterinarias, Universidad Nacional del Litoral, R.P.L. Kreder 2805, 3080 Esperanza, Argentina
| | - Selva I Machado
- Facultad de Ciencias Veterinarias, Universidad Nacional del Litoral, R.P.L. Kreder 2805, 3080 Esperanza, Argentina
| | - Rafael L Althaus
- Facultad de Ciencias Veterinarias, Universidad Nacional del Litoral, R.P.L. Kreder 2805, 3080 Esperanza, Argentina.
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Kim YJ, Huh HJ, Sung H. Challenges of Carbapenem-resistant Pseudomonas aeruginosa in Infection Control and Antibiotic Management. Ann Lab Med 2024; 44:1-2. [PMID: 37665279 PMCID: PMC10485858 DOI: 10.3343/alm.2024.44.1.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/05/2023] Open
Affiliation(s)
- Young Jin Kim
- Department of Laboratory Medicine, Kyung Hee University Hospital, Kyung Hee University School of Medicine, Seoul, Korea
| | - Hee Jae Huh
- Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Heungsup Sung
- Department of Laboratory Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
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Didouh N, Khadidja M, Campos C, Sampaio-Maia B, Boumediene MB, Araujo R. Assessment of biofilm, enzyme production and antibiotic susceptibility of bacteria from milk pre- and post-pasteurization pipelines in Algeria. Int J Food Microbiol 2023; 407:110389. [PMID: 37708608 DOI: 10.1016/j.ijfoodmicro.2023.110389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 09/01/2023] [Accepted: 09/02/2023] [Indexed: 09/16/2023]
Abstract
Bacterial biofilm is a major concern of dairy industry due to its association with milk contamination and its derived products. Algerian pasteurized milk shelf-life does not exceed one day, which may reflect the high level of contamination of this product and presence of extracellular enzymes such as lipases and proteases. This work aimed to investigate the microbial biodiversity in milk-processing surfaces of a dairy plant in Algeria. Therefore, stainless steel cylinders were placed in piping system of the dairy system before and after pasteurization of the milk, being removed after 7 days, for biofilm maturation and microorganism isolation and identification by mass spectrometry. Fifty-nine Gram-positive isolates were identified, namely Bacillus altitudinis, Bacillus cereus, Bacillus pumilus, Bacillus subtilis, Bacillus weithenstephanensis, Enterococcus casseliflavus, Enterococcus faecium, and Staphylococcus epidermidis. In addition, twenty-four Gram-negative isolates were identified, namely Acinetobacter schindleri Enterobacter cloacae, Enterobacter xiangfangensis, Leclercia adecarboxylata, and Raoultella ornithinolytica. Bacterial isolates showed ability for production of extracellular enzymes, being 49 % capable of both proteolytic and lipolytic activities. Milk isolates were tested for the ability to form biofilms on stainless steel. The cell numbers recovered on plate count agar plates from stainless steel biofilms ranged from 3.52 to 6.92 log10 CFU/cm2, being the maximum number detected for Enterococcus casseliflavus. Bacterial isolates showed intermediate and/or resistant profiles to multiple antibiotics. Resistance to amoxicillin, cefoxitin and/or erythromycin was commonly found among the bacterial isolates.
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Affiliation(s)
- Nassima Didouh
- Université Abou Bekr Belkaid Tlemcen, Algeria; Laboratoire de Microbiologie Appliqué à l'Agroalimentaire au Biomédical et à l'Environnement, 13000 Tlemcen, Algeria
| | - Medjahdi Khadidja
- Université Abou Bekr Belkaid Tlemcen, Algeria; Laboratoire de Microbiologie Appliqué à l'Agroalimentaire au Biomédical et à l'Environnement, 13000 Tlemcen, Algeria; Université Hassiba Benbouali Chlef, Algeria
| | - Carla Campos
- Instituto Português de Oncologia (IPO) do Porto Francisco Gentil, Porto, Portugal
| | - Benedita Sampaio-Maia
- Nephrology & Infectious Diseases R&D Group, INEB - Instituto de Engenharia Biomédica, i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal; Faculdade de Medicina Dentária, Universidade do Porto, Porto, Portugal
| | - Moussa Boudjemaa Boumediene
- Université Abou Bekr Belkaid Tlemcen, Algeria; Laboratoire de Microbiologie Appliqué à l'Agroalimentaire au Biomédical et à l'Environnement, 13000 Tlemcen, Algeria
| | - Ricardo Araujo
- Nephrology & Infectious Diseases R&D Group, INEB - Instituto de Engenharia Biomédica, i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal.
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Smith P, Le Devendec L, Jouy E, Larvor E, Lesne J, Kirschner AKT, Rehm C, Leopold M, Pleininger S, Heger F, Jäckel C, Göllner C, Nekat J, Hammerl JA, Baron S. Epidemiological cut-off values for non-O1/ non-O139 Vibrio cholerae disc diffusion data generated by standardised methods. Dis Aquat Organ 2023; 156:115-121. [PMID: 38095366 DOI: 10.3354/dao03766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2023]
Abstract
This work generates the data needed to set epidemiological cut-off values for disc-diffusion zone measurements of Vibrio cholerae. The susceptibility of 147 European isolates of non-O1/non-O139 V. cholerae to 19 antibiotics was established using a standardised disc diffusion method which specified incubation of Mueller Hinton agar plates at 35°C. Epidemiological cut-off values were calculated by analysis of the zone size data with the statistically based normalised resistance interpretation method. Cut-off values for 17 agents were calculated by analysis of the aggregated data from all 4 laboratories participating in this study. The cut-off values calculated were ≥18 mm for amoxicillin/clavulanate, ≥18 mm for amikacin, ≥19 mm for ampicillin, ≥27 mm for cefepime, ≥31 mm for cefotaxime, ≥24 mm for ceftazidime, ≥24 mm for chloramphenicol, ≥31 mm for ciprofloxacin, ≥16 mm for erythromycin, ≥ 27 mm for florfenicol, ≥16 mm for gentamicin, ≥23 mm for imipenem, ≥25 mm for meropenem, ≥29 mm for nalidixic acid, ≥28 mm for norfloxacin, ≥13 mm for streptomycin and ≥23 mm for tetracycline. For the other 2 agents the data from 1 laboratory was excluded from the censored aggregation because the data from that laboratory was considered excessively imprecise. The cut-off values for these 2 agents calculated for the aggregation of the data from 3 laboratories were ≥23 mm for trimethoprim and ≥24 mm for trimethoprim/sulfamethoxazole. These zone size data will be submitted to the Clinical Laboratory Standards Institute (CLSI) and European Committee for Antimicrobial Susceptibility Testing (EUCAST) for their consideration in setting international consensus epidemiological cut-off values for non O1/non-O139 V. cholerae.
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Affiliation(s)
- Peter Smith
- School of Natural Science, University of Galway, Galway H91 TK33, Ireland
| | - Laëtitia Le Devendec
- Anses, Ploufragan-Plouzané-Niort Laboratory, Mycoplasmology-Bacteriology and Antimicrobial Resistance Unit, 22440 Ploufragan, France
| | - Eric Jouy
- Anses, Ploufragan-Plouzané-Niort Laboratory, Mycoplasmology-Bacteriology and Antimicrobial Resistance Unit, 22440 Ploufragan, France
| | - Emeline Larvor
- Anses, Ploufragan-Plouzané-Niort Laboratory, Mycoplasmology-Bacteriology and Antimicrobial Resistance Unit, 22440 Ploufragan, France
| | - Jean Lesne
- École des Hautes Études en Sante Publique, Laboratoire d'Étude et de Recherche en Environnent et Sante, 35000 Rennes, France
| | - Alexander K T Kirschner
- Institute for Hygiene and Applied Immunology - Water Microbiology, Medical University Vienna, Kinderspitalgasse 15, 1090 Austria
- Division Water Quality & Health, Karl Landsteiner University of Health Sciences, Dr. Karl-Dorrek-Straße 30, 3500 Krems, Austria
- Interuniversity Cooperation Centre Water & Health, www.waterandhealth.at
| | - Carmen Rehm
- Institute for Hygiene and Applied Immunology - Water Microbiology, Medical University Vienna, Kinderspitalgasse 15, 1090 Austria
- Division Water Quality & Health, Karl Landsteiner University of Health Sciences, Dr. Karl-Dorrek-Straße 30, 3500 Krems, Austria
- Interuniversity Cooperation Centre Water & Health, www.waterandhealth.at
| | - Melanie Leopold
- Division Water Quality & Health, Karl Landsteiner University of Health Sciences, Dr. Karl-Dorrek-Straße 30, 3500 Krems, Austria
- Interuniversity Cooperation Centre Water & Health, www.waterandhealth.at
| | - Sonja Pleininger
- Institute for Medical Microbiology and Hygiene, Austrian Agency for Health and Food Safety, Austria, Waehringer Strasse 25A, 1094 Vienna, Austria
| | - Florian Heger
- Institute for Medical Microbiology and Hygiene, Austrian Agency for Health and Food Safety, Austria, Waehringer Strasse 25A, 1094 Vienna, Austria
| | - Claudia Jäckel
- Consultant Laboratory for Vibrio spp. in Food, Department Biological Safety, German Federal Institute for Risk Assessment, Max-Dohrn Str. 8-10, 1089 Berlin, Germany
| | - Cornelia Göllner
- Consultant Laboratory for Vibrio spp. in Food, Department Biological Safety, German Federal Institute for Risk Assessment, Max-Dohrn Str. 8-10, 1089 Berlin, Germany
| | - Jonas Nekat
- Consultant Laboratory for Vibrio spp. in Food, Department Biological Safety, German Federal Institute for Risk Assessment, Max-Dohrn Str. 8-10, 1089 Berlin, Germany
| | - Jens Andre Hammerl
- Consultant Laboratory for Vibrio spp. in Food, Department Biological Safety, German Federal Institute for Risk Assessment, Max-Dohrn Str. 8-10, 1089 Berlin, Germany
| | - Sandrine Baron
- Anses, Ploufragan-Plouzané-Niort Laboratory, Mycoplasmology-Bacteriology and Antimicrobial Resistance Unit, 22440 Ploufragan, France
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Kawaguchiya M, Urushibara N, Aung MS, Ohashi N, Takamatsu R, Tsutida S, Ito M, Kobayashi N. Spread of multidrug resistance in non-PCV13/PCV20 serotypes of Streptococcus pneumoniae: A cross-sectional study ten years after the introduction of pneumococcal conjugate vaccine in Japan. J Microbiol Immunol Infect 2023; 56:1288-1292. [PMID: 37517964 DOI: 10.1016/j.jmii.2023.07.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Revised: 04/28/2023] [Accepted: 07/06/2023] [Indexed: 08/01/2023]
Abstract
Ten years after the introduction of the pneumococcal conjugate vaccine (PCV) in Japan, the prevalence rates of non-PCV13 and non-PCV20 serotypes among pediatric pneumococcal isolates were 94.0% and 73.7%, respectively. The predominant non-PCV13/PCV20 serotypes (15A, 35B, and 23A) were mostly multidrug-resistant (≥80.5%), exhibiting non-susceptibility to penicillin.
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Affiliation(s)
- Mitsuyo Kawaguchiya
- Department of Hygiene, Sapporo Medical University School of Medicine, Sapporo, Japan.
| | - Noriko Urushibara
- Department of Hygiene, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Meiji Soe Aung
- Department of Hygiene, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Nobuhide Ohashi
- Department of Hygiene, Sapporo Medical University School of Medicine, Sapporo, Japan
| | | | - Sho Tsutida
- Sapporo Mirai Laboratory, Co. Ltd., Sapporo, Japan
| | - Masahiko Ito
- Sapporo Mirai Laboratory, Co. Ltd., Sapporo, Japan
| | - Nobumichi Kobayashi
- Department of Hygiene, Sapporo Medical University School of Medicine, Sapporo, Japan
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Wise MG, Karlowsky JA, Hackel MA, Harti MA, Ntshole BME, Njagua EN, Oladele R, Samuel C, Khan S, Wadula J, Lowman W, Lembede BW, Sahm DF. In vitro activity of ceftazidime-avibactam against clinical isolates of Enterobacterales and Pseudomonas aeruginosa from sub-Saharan Africa: ATLAS Global Surveillance Program 2017-2021. J Glob Antimicrob Resist 2023; 35:93-100. [PMID: 37709139 DOI: 10.1016/j.jgar.2023.08.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Revised: 08/23/2023] [Accepted: 08/31/2023] [Indexed: 09/16/2023] Open
Abstract
OBJECTIVES To report the in vitro susceptibility of Enterobacterales (n = 3905) and Pseudomonas aeruginosa (n = 1,109) isolates, collected from patients in sub-Saharan Africa (four countries) in 2017-2021, to a panel of 10 antimicrobial agents with a focus on ceftazidime-avibactam activity against resistant phenotypes and β-lactamase carriers. METHODS MICs were determined by CLSI broth microdilution and interpreted using both 2022 CLSI and EUCAST breakpoints. β-lactamase genes were identified in select β-lactam-nonsusceptible isolate subsets using multiplex PCR assays. RESULTS Among Enterobacterales, 96.2% of all isolates were ceftazidime-avibactam-susceptible (MIC90, 0.5 µg/mL), including all serine carbapenemase-positive (n = 127), 99.6% of ESBL-positive, carbapenemase-negative (n = 730), 91.9% of multidrug resistant (MDR; n = 1817), and 42.7% of DTR (difficult-to-treat resistance; n = 171) isolates. Metallo-β-lactamase (MBL) genes were identified in most (n = 136; 91.2%) ceftazidime-avibactam-resistant isolates (3.5% of all Enterobacterales isolates). Ceftazidime-avibactam percent susceptible values ranged from 99.5% (Klebsiella species other than Klebsiella pneumoniae) to 92.5% (K. pneumoniae) for the various Enterobacterial taxa examined. Greater than 90% of Enterobacterales isolates from each country (Cameroon, Ivory Coast, Nigeria, South Africa) were ceftazidime-avibactam-susceptible. Among P. aeruginosa, 88.9% of all isolates were ceftazidime-avibactam-susceptible (MIC90, 16 µg/mL). Most (88.5%) MBL-negative, meropenem-resistant (n = 78), 68.1% of MDR (n = 385), and 19.2% of DTR isolates (n = 99) were ceftazidime-avibactam-susceptible. MBL genes were identified in 43.1% of ceftazidime-avibactam-resistant isolates (n = 53; 4.8% of all P. aeruginosa isolates). Country-specific ceftazidime-avibactam percent susceptible values for P. aeruginosa ranged from 94.1% (Cameroon) to 76.2% (Nigeria). CONCLUSION Reference in vitro antimicrobial susceptibility testing demonstrated that most recent Enterobacterales (96%) and P. aeruginosa (89%) clinical isolates from four sub-Saharan African countries were ceftazidime-avibactam susceptible.
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Affiliation(s)
| | - James A Karlowsky
- IHMA, Schaumburg, Illinois; Department of Medical Microbiology and Infectious Diseases, Max Rady College of Medicine, University of Manitoba, Winnipeg, Canada
| | | | | | | | | | | | | | | | - Jeannette Wadula
- Department of Clinical Microbiology and Infectious Diseases, Faculty of Health Sciences, University of Witwatersrand, Chris Hani Baragwanath Academic Hospital, National Health Laboratory Services, Soweto, South Africa
| | - Warren Lowman
- Department of Clinical Microbiology, PathCare/Vermaak Pathologists, Gauteng, South Africa; Department Clinical Microbiology and Infectious Diseases, Faculty of Health Sciences, University of Witwatersrand, Johannesburg, South Africa; Department of Clinical Microbiology and Infection Prevention and Control, Wits Donald Gordon Medical Centre, Johannesburg, South Africa
| | - Busisani W Lembede
- Pfizer, Inc., Johannesburg, South Africa; School of Physiology, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
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Tsai CS, Wang JL, Liao YS, Fukushige M, Chiou CS, Ko WC. Shigellosis in Taiwan: An old enteric pathogen with changing epidemiology and increasing antimicrobial resistance. J Microbiol Immunol Infect 2023:S1684-1182(23)00206-2. [PMID: 37951802 DOI: 10.1016/j.jmii.2023.10.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Revised: 10/07/2023] [Accepted: 10/29/2023] [Indexed: 11/14/2023]
Abstract
While the incidence of shigellosis has decreased in developed nations due to improved living conditions and healthcare systems, it remains prevalent in economically developing regions. In recent years, a resurgence of shigellosis has been observed in the United States, Europe, and Taiwan, primarily among men having sex with men and people living with human immunodeficiency virus, along with a rise in antimicrobial resistance. This study aims to review the historical epidemiological trends and drug resistance in shigellosis, with a focus on Taiwan. A comprehensive search was conducted using various databases and sources, including non-English literature in Japanese and Chinese. In developed countries, Shigella sonnei and Shigella flexneri are the most common species, while Shigella dysenteriae infections are sporadic. In Taiwan, the classification and prevalence of Shigella species have evolved over time, with S. flexneri and S. sonnei being the predominant strains. Fluoroquinolone resistance and azithromycin non-susceptibility are the ongoing threat. In conclusion, shigellosis remains a significant global health concern, with recent increases in certain populations and antimicrobial resistance. Further research is necessary to understand the clinical significance and risk factors associated with asymptomatic carriers and to assess the impact of behavioral modifications and interventions in high-risk populations.
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Affiliation(s)
- Chin-Shiang Tsai
- Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan; Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan; Department of Internal Medicine, National Cheng Kung University Hospital, Dou-Liou Branch, College of Medicine, National Cheng Kung University, Yunlin, Taiwan
| | - Jiun-Ling Wang
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan; Department of Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Ying-Shu Liao
- Center for Diagnostics and Vaccine Development, Centers for Disease Control, Taichung, Taiwan
| | - Mizuho Fukushige
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan; Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Chien-Shun Chiou
- Center for Diagnostics and Vaccine Development, Centers for Disease Control, Taichung, Taiwan.
| | - Wen-Chien Ko
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan; Department of Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan.
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Miotti C, Cicotello J, Suarez Archilla G, Neder V, Alvarado Lucero W, Calvinho L, Signorini M, Camussone C, Zbrun MV, Molineri AI. Antimicrobial resistance of Streptococcus uberis isolated from bovine mastitis: Systematic review and meta-analysis. Res Vet Sci 2023; 164:105032. [PMID: 37844492 DOI: 10.1016/j.rvsc.2023.105032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 09/14/2023] [Accepted: 09/29/2023] [Indexed: 10/18/2023]
Abstract
Streptococcus uberis is one of the most common pathogens associated with bovine mastitis, commonly treated with antimicrobials (AM), favoring the appearance of antimicrobial resistance (AMR). The objective of this work was to determine the proportion of phenotypic AMR among S. uberis isolated worldwide from bovine intramammary infections between the years 1983-2022, and to assess the variables associated by means of a systematic review and metanalysis. Sixty articles were eligible for quantitative review. Ninety-four independent studies were obtained. The antimicrobials evaluated in more S. uberis strains were penicillin (21,987 strains), oxacillin (21,727 strains), erythromycin (20,013 strains), and ampicillin (19,354 strains). Most of the studies included in this meta-analysis were from Europe (44), followed by America (25), Africa (10), Asia (10), and Oceania (5). Among the included articles, 22 were published from 1983 to 2006, 23 from 2007 to 2012, 25 from 2013 to 2015, and the remaining 24 after 2016. Penicillin, erythromycin, and tetracycline were the antimicrobials with >25 studies. Therefore, the following analyses were performed only for these antimicrobials, presenting a high heterogeneity index (I2). The variability observed for penicillin and tetracycline was only explained, partially, by continent of origin. The variability observed for erythromycin was not explained by any of the potential explanatory variables included in this study. The S. uberis proportion of resistance to antimicrobials is highly variable and probably influenced by many factors other than those studied in this meta-analysis, where it was not possible to inform a unique average proportion of resistance.
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Affiliation(s)
- Camila Miotti
- Instituto de Investigación de la Cadena Láctea (INTA-CONICET), Estación Experimental Agropecuaria Rafaela, Ruta 34 Km 227, Rafaela, Santa Fe, Argentina
| | - Joaquín Cicotello
- Instituto de Investigación de la Cadena Láctea (INTA-CONICET), Estación Experimental Agropecuaria Rafaela, Ruta 34 Km 227, Rafaela, Santa Fe, Argentina
| | - Guillermo Suarez Archilla
- Instituto de Investigación de la Cadena Láctea (INTA-CONICET), Estación Experimental Agropecuaria Rafaela, Ruta 34 Km 227, Rafaela, Santa Fe, Argentina
| | - Verónica Neder
- Instituto de Investigación de la Cadena Láctea (INTA-CONICET), Estación Experimental Agropecuaria Rafaela, Ruta 34 Km 227, Rafaela, Santa Fe, Argentina
| | - Wanda Alvarado Lucero
- Instituto de Investigación de la Cadena Láctea (INTA-CONICET), Estación Experimental Agropecuaria Rafaela, Ruta 34 Km 227, Rafaela, Santa Fe, Argentina
| | - Luis Calvinho
- Instituto de Investigación de la Cadena Láctea (INTA-CONICET), Estación Experimental Agropecuaria Rafaela, Ruta 34 Km 227, Rafaela, Santa Fe, Argentina
| | - Marcelo Signorini
- Instituto de Investigación de la Cadena Láctea (INTA-CONICET), Estación Experimental Agropecuaria Rafaela, Ruta 34 Km 227, Rafaela, Santa Fe, Argentina
| | - Cecilia Camussone
- Instituto de Investigación de la Cadena Láctea (INTA-CONICET), Estación Experimental Agropecuaria Rafaela, Ruta 34 Km 227, Rafaela, Santa Fe, Argentina
| | - María Virginia Zbrun
- Instituto de Investigación de la Cadena Láctea (INTA-CONICET), Estación Experimental Agropecuaria Rafaela, Ruta 34 Km 227, Rafaela, Santa Fe, Argentina.
| | - Ana Inés Molineri
- Instituto de Investigación de la Cadena Láctea (INTA-CONICET), Estación Experimental Agropecuaria Rafaela, Ruta 34 Km 227, Rafaela, Santa Fe, Argentina
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Agyirifo DS, Mensah TA, Senya ASY, Hounkpe A, Dornyoh CD, Otwe EP. Dynamics of antimicrobial resistance and virulence of staphylococcal species isolated from foods traded in the Cape Coast metropolitan and Elmina municipality of Ghana. Heliyon 2023; 9:e21584. [PMID: 38027608 PMCID: PMC10663863 DOI: 10.1016/j.heliyon.2023.e21584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Revised: 10/20/2023] [Accepted: 10/24/2023] [Indexed: 12/01/2023] Open
Abstract
The impact of staphylococci on food poisoning and infections could be higher than previously reported. In this study, we characterised the occurrence and coexistence of antimicrobial resistance and virulence genes of staphylococci isolates in foods. Staphylococci were isolated from 236 samples of selected street-vended foods and identified. The pattern of antimicrobial resistance and virulence genes in the staphylococci were assessed using disc diffusion, PCR and analysis of next-generation sequencing data. The food samples (70.76 %) showed a high prevalence of staphylococci and differed among the food categories. Forty-five Staphylococcus species were identified and comprised coagulase-negative and positive species. Staphylococcus sciuri (now Mammaliicoccus sciuri), S. aureus, S. kloosii, S. xylosus, S. saprophyticus, S. haemolyticus and S. succinus were the most abundant species. The staphylococcal isolates exhibited resistance to tetracycline, levofloxacin, ciprofloxacin, norfloxacin, gentamicin and amikacin and susceptibility to nitrofurantoin. Antimicrobial susceptibilities were also reported for cefoperazone, ceftriaxone, cefotaxime, nalidixic acid and piperacillin-tazobactam. The antimicrobial resistance and virulence genes commonly detected consisted of tet, arl, macB, van, gyr, nor, optrA, bcrA, blaZ, taeA and S. aureus lmrS. The isolates frequently exhibited multiple resistance (30.42 %) of up to eight antimicrobial drug classes. The isolates predominantly harboured genes that express efflux pump proteins (50.53 %) for antibiotic resistance compared with inactivation (10.05 %), target alteration (26.72 %), protection (7.67 %) and replacement (3.17 %). The virulence determinants comprised genes of pyrogenic toxin superantigens (eta, etb, tst), adhesions (clf, fnbA, fnbB, cna, map, ebp, spA, vWbp, coa) and genes that express exoproteins (nuclease, metalloprotease, γ-hemolysin, hyaluronate lyase). There was a statistically significant difference in the prevalence of staphylococci isolates and their antimicrobial resistance and virulence profile as revealed by the phenotypic, PCR and next-generation sequencing techniques. The findings suggest a higher health risk for consumers. We recommend a critical need for awareness and antimicrobial susceptibility and anti-virulence strategies to ensure food safety and counteract the spread of this clinically relevant genus.
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Affiliation(s)
- Daniel Sakyi Agyirifo
- Department of Molecular Biology and Biotechnology, School of Biological Sciences, University of Cape Coast, Cape Coast, Ghana
| | - Theophilus Abonyi Mensah
- Department of Molecular Biology and Biotechnology, School of Biological Sciences, University of Cape Coast, Cape Coast, Ghana
| | - Andrews Senyenam Yao Senya
- Department of Molecular Biology and Biotechnology, School of Biological Sciences, University of Cape Coast, Cape Coast, Ghana
| | - Alphonse Hounkpe
- Department of Molecular Biology and Biotechnology, School of Biological Sciences, University of Cape Coast, Cape Coast, Ghana
| | - Cindy Deladem Dornyoh
- Department of Molecular Biology and Biotechnology, School of Biological Sciences, University of Cape Coast, Cape Coast, Ghana
| | - Emmanuel Plas Otwe
- Department of Molecular Biology and Biotechnology, School of Biological Sciences, University of Cape Coast, Cape Coast, Ghana
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Wei X, Li Q, He Y, Li L, Li S, Li T. Molecular characteristics and antimicrobial resistance profiles of Carbapenem-Resistant Klebsiella pneumoniae isolates at a tertiary hospital in Nanning, China. BMC Microbiol 2023; 23:318. [PMID: 37898766 PMCID: PMC10612196 DOI: 10.1186/s12866-023-03038-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Accepted: 10/03/2023] [Indexed: 10/30/2023] Open
Abstract
PURPOSE Carbapenem resistant Klebsiella pneumoniae is associated with nosocomial infections and can cause high mortality, which poses great threat to human health. This study was aimed at investigating the molecular epidemiology and antimicrobial resistance profiles of carbapenem resistant Klebsiella pneumoniae isolates and providing clues for management and control of carbapenem resistant Klebsiella pneumoniae infections. METHODS A total of 2324 Klebsiella pneumoniae strains were isolated from the First Affiliated Hospital of Guangxi Medical University from June 2018 to October 2020, and 103 carbapenem resistant Klebsiella pneumoniae strains from inpatients were collected, and the specimens mainly came from the sputum, urine, secretions, and blood. The antimicrobial susceptibility tests were performed using the VITEK 2 Compact system or the Kirby-Bauer disk-diffusion method. The resistance genes were detected by polymerase chain reaction and sequencing. The homology analysis of carbapenem resistant Klebsiella pneumoniae strains was performed by multilocus sequence typing. RESULTS Antimicrobial susceptibility results showed that the 103 carbapenem resistant Klebsiella pneumoniae strains were resistant to most common antibiotics. Resistance genes detection showed that the carbapenem resistant Klebsiella pneumoniae isolates mainly carried metallo-beta-lactamase, and the predominant gene was NDM-1. The homology analysis found that the major ST type were ST11, follow by ST15 and ST17. CONCLUSION The carbapenem resistant Klebsiella pneumoniae isolates in our study shown resistance to most common antibiotics. Of the 103 carbapenem resistant Klebsiella pneumoniae strains, 91 strains (88.35%) carried carbapenemases genes, and NDM was the predominant carbapenemase gene detected. ST11 was the major ST typing of carbapenem resistant Klebsiella pneumoniae in our hospital. Our finding may play a role in control and management of the carbapenem resistant Klebsiella pneumoniae infections and guiding clinical antibiotic therapy. In addition, metallo-beta-lactamase should be served as a key target to be monitored in carbapenem resistant Klebsiella pneumoniae infection.
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Affiliation(s)
- Xianzhen Wei
- Department of Clinical Laboratory, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Qiuxiang Li
- Department of Clinical Laboratory, Joint Logistics Support Force of the Chinese People's Liberation Army, 923 Hospital, Nanning, China
| | - Yu He
- Department of Clinical Laboratory, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Linlin Li
- Department of Clinical Laboratory, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Shan Li
- Department of Clinical Laboratory, The First Affiliated Hospital of Guangxi Medical University, Nanning, China.
| | - Taijie Li
- Department of Clinical Laboratory, Wuming Hospital of Guangxi Medical University, Nanning, China.
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Tunesi S, Zelazny A, Awad Z, Mougari F, Buyck JM, Cambau E. Antimicrobial susceptibility of Mycobacterium abscessus and treatment of pulmonary and extra-pulmonary infections. Clin Microbiol Infect 2023:S1198-743X(23)00482-2. [PMID: 37797824 DOI: 10.1016/j.cmi.2023.09.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Revised: 09/17/2023] [Accepted: 09/27/2023] [Indexed: 10/07/2023]
Abstract
BACKGROUND Mycobacterium abscessus (MAB) is the mycobacterial species least susceptible to antimicrobials. Infections are difficult to treat, and cure rates are below 50% even after a combination of 4-5 drugs for many months. OBJECTIVES To examine antimicrobial susceptibilities and treatment recommendations in light of what is known about mechanisms of resistance and pharmacodynamics/pharmacokinetics (PK/PD) interactions. SOURCES Original papers on the topics of 'antimicrobials', 'susceptibility', 'treatment', and 'outcome' from 2019 onwards, in the context of the evidence brought by the guidelines published in 2020 for pulmonary infections. CONTENT MAB is susceptible in vitro to only a few antimicrobials. Breakpoints were set by the Clinical and Laboratory Standards Institute and are revised by the European Committee on Antimicrobial Susceptibility Testing for epidemiological cut-off values. Innate resistance is due to multiple resistance mechanisms involving efflux pumps, inactivating enzymes, and low drug-target affinity. In addition, MAB may display acquired resistance to macrolides and amikacin through mutations in drug binding sites. Treatment outcomes are better for macrolide-based combinations and MAB subspecies massiliense. New compounds in the family of cyclines, oxazolidinones, and penem-β-lactamase inhibitor combinations (described in another paper), as well as bedaquiline, a new antituberculous agent, are promising, but their efficacy remains to be proven. PK/PD studies, which are critical for establishing optimal dosing regimens, were mainly done for monotherapy and healthy individuals. IMPLICATIONS Medical evidence is poor, and randomized clinical trials or standardized cohorts are needed to compare outcomes of patients with similar underlying disease, clinical characteristics, and identified MAB subspecies/sequevar. Microbiological diagnosis and susceptibility testing need to be harmonized to enable the comparison of agents and the testing of new compounds. Testing antimicrobial combinations requires new methods, especially for PK/PD parameters. Molecular testing may help in assessing MAB resistance prior to treatment. New antimicrobials need to be systematically tested against MAB to find an effective antimicrobial regimen.
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Affiliation(s)
- Simone Tunesi
- UOC Malattie infettive, Azienda Ospedaliera SS Antonio e Biagio e Cesare Arrigo, Alessandria, Italy
| | - Adrian Zelazny
- Microbiology Service, Department of Laboratory Medicine, Clinical Center, National Institutes of Health, Bethesda, MD, USA
| | - Zeina Awad
- Service de mycobactériologie spécialisée et de référence, Laboratoire associé du CNR des mycobactéries et de la résistance des mycobactéries aux antituberculeux (CNR-MyRMA) APHP GHU Paris Nord, Hôpital Bichat, Paris, France
| | - Faiza Mougari
- Service de mycobactériologie spécialisée et de référence, Laboratoire associé du CNR des mycobactéries et de la résistance des mycobactéries aux antituberculeux (CNR-MyRMA) APHP GHU Paris Nord, Hôpital Bichat, Paris, France
| | - Julien M Buyck
- Université de Poitiers, PHAR2, Inserm UMR 1070, Poitiers, France
| | - Emmanuelle Cambau
- Service de mycobactériologie spécialisée et de référence, Laboratoire associé du CNR des mycobactéries et de la résistance des mycobactéries aux antituberculeux (CNR-MyRMA) APHP GHU Paris Nord, Hôpital Bichat, Paris, France; Université Paris Cité, IAME, Inserm UMR 1137, Paris, France.
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Sultana R, Cordeiro RP, Timsit E, McAllister TA, Alexander TW. Prevalence and antimicrobial susceptibility of Mycoplasma bovis from the upper and lower respiratory tracts of healthy feedlot cattle and those diagnosed with bovine respiratory disease. Vet Microbiol 2023; 285:109838. [PMID: 37690145 DOI: 10.1016/j.vetmic.2023.109838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 06/14/2023] [Accepted: 07/27/2023] [Indexed: 09/12/2023]
Abstract
Mycoplasma bovis is an important respiratory pathogen of cattle. In this study, the prevalence and antimicrobial susceptibility of M. bovis were evaluated from two Cohorts of feedlot cattle spanning an 8-year period. In the first study conducted in 2008-2009, nasopharyngeal swabs from cattle sampled at feedlot entry and after 60 days on feed were collected (Cohort 1). In a second study conducted in 2015-2016, nasopharyngeal and trans-tracheal samples were collected from cattle diagnosed with bovine respiratory disease (BRD) and matching healthy controls (Cohort 2). For Cohort 1, the prevalence of M. bovis was lower in cattle at entry compared to when the same individuals were sampled ≥60 days later (P < 0.05). For Cohort 2, the prevalence of M. bovis was greater in both nasopharyngeal and tracheal samples from cattle diagnosed with BRD, compared to controls (P < 0.05). In both Cohorts, almost all isolates were resistant to tilmicosin. Compared to M. bovis from Cohort 1, isolates of Cohort 2 exhibited increased resistance to clindamycin, enrofloxacin, florfenicol, tylosin, and tulathromycin, with the latter showing resistance levels >90 %. These data suggest that antimicrobials used to prevent and treat BRD selected for resistance in M. bovis over the 8-year period. For macrolides, cross-resistance occurred and M. bovis can retain resistance even when antimicrobial selection pressure is removed. Within 9 years of commercial availability of tulathromycin, the majority of M. bovis displayed resistance. Therefore, longitudinal evaluation of resistance in respiratory pathogens is important to ensure efficacious treatment of BRD.
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Affiliation(s)
- Razia Sultana
- Lethbridge Research and Development Centre, Agriculture and Agri-Food Canada, Lethbridge, Alberta, Canada; Department of Biological Sciences, University of Lethbridge, Lethbridge, Alberta, Canada
| | - Roniele P Cordeiro
- Lethbridge Research and Development Centre, Agriculture and Agri-Food Canada, Lethbridge, Alberta, Canada
| | - Edouard Timsit
- Department of Pharma Innovation, Ceva Santé Animale, Libourne, France
| | - Tim A McAllister
- Lethbridge Research and Development Centre, Agriculture and Agri-Food Canada, Lethbridge, Alberta, Canada
| | - Trevor W Alexander
- Lethbridge Research and Development Centre, Agriculture and Agri-Food Canada, Lethbridge, Alberta, Canada.
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Wang MC, Fan YH, Zhang YZ, Bregente CJB, Lin WH, Chen CA, Lin TP, Kao CY. Characterization of uropathogenic Escherichia coli phylogroups associated with antimicrobial resistance, virulence factor distribution, and virulence-related phenotypes. Infect Genet Evol 2023; 114:105493. [PMID: 37634856 DOI: 10.1016/j.meegid.2023.105493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 08/15/2023] [Accepted: 08/24/2023] [Indexed: 08/29/2023]
Abstract
In this study, we compared the characteristics of different uropathogenic Escherichia coli phylogroups. A total of 844 E. coli isolated from urine were enrolled and the antimicrobial susceptibility of E. coli to 22 antibiotics was determined by disk diffusion test. The distribution of phylogroups and 20 virulence factor genes was determined by PCR. Phenotypes associated with bacterial virulence, including motility, biofilm formation, and the production of curli and siderophore, were examined. Phylogroup B2 was dominant in our isolates (64.8%), followed by phylogroups D (8.6%), B1 (7.8%), F (6.0%), C (4.5%), A (3.1%), untypable (2.8%), E (1.8%), and clade I (0.5%). The prevalence of multidrug-resistant strains was highest in phylogroup C (86.8%), followed by E (80.0%), F (75.0%), and D (71.2%). Moreover, 23.5% of the phylogroup F E. coli were extensively drug-resistant. Phylogroup B2 E. coli had an average of the highest virulence factor genes (10.1 genes/isolate). Compared to phylogroup B2 E. coli, phylogroups F and clade I E. coli had higher motility while phylogroup C E. coli had lower motility. >60% of phylogroups A and C E. coli showed very low curli production. In contrast, 14%, 10%, and 7%, of E. coli in phylogroups F, B2, and E, produced a very high amount of curli, respectively. Surprisingly, phylogroup A E. coli showed the highest virulence to larvae, followed by phylogroups B2 and C. In summary, we first characterized and revealed that the antimicrobial resistance, virulence gene distribution, motility, and curli production, were associated with in E. coli phylogroups.
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Affiliation(s)
- Ming-Cheng Wang
- Division of Nephrology, Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Taiwan
| | - Yu-Hua Fan
- Department of Urology, Taipei Veterans General Hospital, Taipei, Taiwan; Department of Urology, College of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Yen-Zhen Zhang
- Institute of Microbiology and Immunology, College of Life Sciences, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Carl Jay Ballena Bregente
- Institute of Microbiology and Immunology, College of Life Sciences, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Wei-Hung Lin
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Chao-An Chen
- Department of Biotechnology and Laboratory Science in Medicine, School of Biomedical Science and Engineering, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Tzu-Ping Lin
- Department of Urology, Taipei Veterans General Hospital, Taipei, Taiwan; Department of Urology, College of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Cheng-Yen Kao
- Institute of Microbiology and Immunology, College of Life Sciences, National Yang Ming Chiao Tung University, Taipei, Taiwan; Health Innovation Center, National Yang Ming Chiao Tung University, Taipei, Taiwan; Microbiota Research Center, National Yang Ming Chiao Tung University, Taipei, Taiwan.
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Łada P, Kończyk-Kmiecik K, Bancerz-Kisiel A. Isolation, characterization and antimicrobial resistance of Yersinia enterocolitica from Polish cattle and their carcasses. BMC Vet Res 2023; 19:143. [PMID: 37670289 PMCID: PMC10478351 DOI: 10.1186/s12917-023-03700-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Accepted: 08/21/2023] [Indexed: 09/07/2023] Open
Abstract
BACKGROUND Yersinia enterocolitica is a heterogeneous bacterial species that has been divided into six biotypes and more than 70 serotypes. Each year, the European Food Safety Authority classifies yersiniosis caused by Y. enterocolitica as one of the most important zoonotic diseases. The prevalence of Y. enterocolitica in cattle has not been thoroughly analyzed in Poland, and beef and bovine carcasses contaminated with antimicrobial resistant Y. enterocolitica pose a health risk for both, farm workers and consumers. Therefore, the aim of this study was to evaluate the prevalence of Y. enterocolitica in cattle and to determine the antimicrobial susceptibility of the isolated strains. RESULTS A total of 1020 samples were analyzed, including 660 rectal swabs collected from live cattle and 360 swabs from cold-stored beef carcasses. The results of this study indicate that Y. enterocolitica was isolated from three of the 15 examined cattle herds and the prevalence within these herds ranged from 0% to nearly 32%. Y. enterocolitica was isolated from 14.7% of the examined heifers, 7.4% of calves and 5.5% of adult cows. More than 65% of the strains were isolated from cold enrichment. The strains isolated from live cattle tested positive for the ystB gene, while ail and ystA genes were not found. Most of the isolated strains belonged to bioserotype 1A/NT. The majority of the isolated strains were resistant to ampicillin, cefalexin and amoxicillin with clavulanic acid, however these are expected phenotypes for Y. enterocolitica. CONCLUSIONS The results of this study indicate that Y. enterocolitica is present in cattle herds in Poland. The strains isolated from live cattle were ystB-positive, most of them belonged to bioserotype 1A/NT. The prevalence of Y. enterocolitica strains was generally low in cold-stored beef carcasses.
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Affiliation(s)
- Piotr Łada
- Department of Epizootiology, Faculty of Veterinary Medicine, University of Warmia and Mazury, Oczapowskiego 2 St, 10-719 Olsztyn, Poland
| | - Klaudia Kończyk-Kmiecik
- Department of Epizootiology, Faculty of Veterinary Medicine, University of Warmia and Mazury, Oczapowskiego 2 St, 10-719 Olsztyn, Poland
| | - Agata Bancerz-Kisiel
- Department of Epizootiology, Faculty of Veterinary Medicine, University of Warmia and Mazury, Oczapowskiego 2 St, 10-719 Olsztyn, Poland
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Kiratisin P, Kempf M, Stone G, Utt E. Ceftazidime-avibactam and comparators against Pseudomonas aeruginosa isolates collected globally and in each geographical region between 2017-2020. J Glob Antimicrob Resist 2023; 34:113-118. [PMID: 37422001 DOI: 10.1016/j.jgar.2023.06.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 06/16/2023] [Indexed: 07/10/2023] Open
Abstract
OBJECTIVES The objective of this study was to assess the distribution and antimicrobial susceptibility of Pseudomonas aeruginosa isolates against ceftazidime-avibactam (CAZ-AVI) and a panel of comparator agents collected globally and in each region from 2017-2020 from the Antimicrobial Testing Leadership and Surveillance program. METHODS Susceptibility and minimum inhibitory concentration of all P. aeruginosa isolates were determined using broth microdilution methodology according to the Clinical and Laboratory Standards Institute guidelines. RESULTS Of the total 29746 isolates of P. aeruginosa collected, 20.9% were multidrug resistant (MDR), 20.7% were extremely drug resistant (XDR), 8.4% were CAZ-AVI-resistant (CAZ-AVI-R), and 3.0% were MBL-positive. Amongst the MBL-positive isolates, the proportion of VIM-positive isolates was highest (77.8%). The highest proportion of MDR (25.5%), XDR (25.0%), MBL-positive (5.7%), and CAZ-AVI-R (12.3%) isolates were in Latin America. Amongst the sources, the highest proportion of isolates were from respiratory sources (43.0%), and the majority of isolates were from non-intensive care unit wards (71.2%). Overall, all P. aeruginosa isolates (90.9%) showed high susceptibility to CAZ-AVI. However, MDR and XDR isolates were less susceptible to CAZ-AVI (≤60.7). The only comparators to which all isolates of P. aeruginosa showed good overall susceptibility were colistin (99.1%) and amikacin (90.5%). However, only colistin was active (≥98.3%) against all the resistant isolates. CONCLUSION CAZ-AVI presents a potential treatment option against P. aeruginosa infections. However, active monitoring and surveillance, especially of the resistant phenotypes, is warranted for effective treatment of infections caused by P. aeruginosa.
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Affiliation(s)
- Pattarachai Kiratisin
- Department of Microbiology, Faculty of Medicine Siriraj Hospital, Mahidol University, Thailand
| | - Marie Kempf
- University Hospital Angers, Laboratory of Bacteriology, France
| | - Gregory Stone
- Univ Angers, Nantes Université, CHU Angers, Inserm, INCIT, Angers, France
| | - Eric Utt
- Pfizer Inc, Groton, Connecticut.
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Yokota SI, Tsukamoto N, Sato T, Ohkoshi Y, Yamamoto S, Ogasawara N. Serotype replacement and an increase in non-encapsulated isolates among community-acquired infections of Streptococcus pneumoniae during post-vaccine era in Japan. IJID Reg 2023; 8:105-110. [PMID: 37554357 PMCID: PMC10404989 DOI: 10.1016/j.ijregi.2023.07.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Revised: 07/05/2023] [Accepted: 07/06/2023] [Indexed: 08/10/2023]
Abstract
OBJECTIVES It is feared that the serotype replacement of Streptococcus pneumoniae occurred by the introduction of pneumococcal vaccines as periodical inoculation leads to reduced efficacy of the approved vaccines and altered antimicrobial susceptibility. METHODS We determined serotypes of 351 S. pneumoniae isolates collected at a commercial clinical laboratory in Hokkaido prefecture, Japan, from December 2018 to February 2019 by using the polymerase chain reaction procedure of the US Centers for Disease Control and Prevention. Antimicrobial susceptibility and resistance gene profiles were also examined. RESULTS Vaccine coverage rates were 7.9% for 13-valent conjugate vaccine, and 32.5% for 23-valent polysaccharide vaccine, respectively. Non-typable strains were 19.7%. cpsA-positive isolates (group I), and null capsule clade (NCC)1, NCC2 and NCC3 (group II) comprised 31.3%, 28.4%, 32.8%, and 7.5% of the 69 non-typable strains, respectively. No penicillin-resistant/intermediate isolates were found; however, serotypes 35B and 15A/F showed low susceptibility to β-lactams. Only five strains (1.4%) were levofloxacin-resistant, and all were from the older persons, and three strains were serotype 35B. CONCLUSION The progression of serotype replacement in non-invasive pneumococcal infections has occurred during the post-vaccine era in Japan, and non-encapsulated isolates, such as NCC, have increased. Antimicrobial susceptibility is not worsened.
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Affiliation(s)
- Shin-ichi Yokota
- Department of Microbiology, Sapporo Medical University School of Medicine, Sapporo, Japan
| | | | - Toyotaka Sato
- Laboratory of Veterinary Hygiene, Faculty of Veterinary Medicine, Hokkaido University, Sapporo, Japan
- Graduate School of Infectious Diseases, Hokkaido University, Sapporo, Japan
- One Health Research Center, Hokkaido University, Sapporo, Japan
| | - Yasuo Ohkoshi
- Department of Microbiology, Sapporo Medical University School of Medicine, Sapporo, Japan
- Department of Clinical Laboratory, NTT Medical Center Sapporo, Sapporo, Japan
| | - Soh Yamamoto
- Department of Microbiology, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Noriko Ogasawara
- Department of Microbiology, Sapporo Medical University School of Medicine, Sapporo, Japan
- Department of Otolaryngology-Head and Neck Surgery, Sapporo Medical University School of Medicine, Sapporo, Japan
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Sánchez D, Torres I, Giménez E, Albert E, Costa RM, Padrón C, Carretero D, Colomina J, Navarro D. A rapid MALDI-TOF mass spectrometry-based method for categorization of Pseudomonas aeruginosa from blood cultures as susceptible or resistant to meropenem. J Microbiol Methods 2023; 212:106803. [PMID: 37544430 DOI: 10.1016/j.mimet.2023.106803] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 07/24/2023] [Accepted: 08/03/2023] [Indexed: 08/08/2023]
Abstract
We developed and evaluated a simple, low-cost matrix-assisted laser desorption/ionization mass spectrometry (MALDI-TOF MS)-based method for the detection of meropenem (MER) resistance in Pseudomonas aeruginosa directly from blood. A volume of 50 μL of positive-flagged blood culture (BC) was transferred in 450 μL brain heart infusion (BHI) broth to microtubes either containing MER (test) or not (control) at 25 or 50 mg/L. P. aeruginosa was categorized as resistant or susceptible on the basis of whether or not the isolates could be identified, respectively, in the presence of the antibiotic (3 h of incubation). When using BCs spiked with 99 P. aeruginosa isolates (64 MER-resistant and 35 MER-susceptible) the method correctly classified 88/99 isolates (88.9%). Correct categorization was achieved in 23/23 (100%) of P. aeruginosa isolates (17 MER-susceptible and 6 MER-resistant) from prospectively collected BCs. Our method may prove useful for early targeted or adjustment of empirical therapy in patients with P. aeruginosa bloodstream infections.
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Affiliation(s)
- David Sánchez
- Microbiology Service, Hospital Clínico Universitario, Instituto de Investigación INCLIVA, Valencia, Spain
| | - Ignacio Torres
- Microbiology Service, Hospital Clínico Universitario, Instituto de Investigación INCLIVA, Valencia, Spain
| | - Estela Giménez
- Microbiology Service, Hospital Clínico Universitario, Instituto de Investigación INCLIVA, Valencia, Spain
| | - Eliseo Albert
- Microbiology Service, Hospital Clínico Universitario, Instituto de Investigación INCLIVA, Valencia, Spain
| | - Rosa María Costa
- Microbiology Service, Hospital Clínico Universitario, Instituto de Investigación INCLIVA, Valencia, Spain
| | - Carmelo Padrón
- Microbiology Service, Hospital Clínico Universitario, Instituto de Investigación INCLIVA, Valencia, Spain
| | - Diego Carretero
- Microbiology Service, Hospital Clínico Universitario, Instituto de Investigación INCLIVA, Valencia, Spain
| | - Javier Colomina
- Microbiology Service, Hospital Clínico Universitario, Instituto de Investigación INCLIVA, Valencia, Spain
| | - David Navarro
- Microbiology Service, Hospital Clínico Universitario, Instituto de Investigación INCLIVA, Valencia, Spain; Department of Microbiology, School of Medicine, University of Valencia, Spain.
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Feng J, Zhuang Y, Luo J, Xiao Q, Wu Y, Chen Y, Chen M, Zhang X. Prevalence of colistin-resistant mcr-1-positive Escherichia coli isolated from children patients with diarrhoea in Shanghai, 2016-2021. J Glob Antimicrob Resist 2023; 34:166-175. [PMID: 37355039 DOI: 10.1016/j.jgar.2023.06.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 06/07/2023] [Accepted: 06/08/2023] [Indexed: 06/26/2023] Open
Abstract
OBJECTIVES The emergence of the plasmid-mediated colistin resistance 1 (mcr-1) of Escherichia coli has become a global health concern. This study reports the prevalence of mcr-1 among E. coli isolates from patients with diarrheal disease in Shanghai and the genetic characterization of mcr-1-harbouring plasmids. METHODS A total of 1723 E. coli strains were collected from the faeces of patients with diarrheal disease in all sentinel hospitals in Shanghai from 2016 to 2021. Antimicrobial susceptibility testing was performed by broth microdilution and plasmid conjunction transfer assay was carried out using E. coli C600 as the recipient. The mcr-1-positive E. coli strains (MCRPEC) were subjected to molecular characterization and bioinformatic analysis of the mcr-1-bearing plasmids that they harboured. RESULTS Only 5 (0.28%) strains were found to harbour the mcr-1 gene using PCR screening. Plasmid conjugation assay and whole-genome sequencing indicated that EC16500, one MCRPEC strain that co-exhibited mcr-1, blaTEM-1, blaOXA-1, qnrS1, qnrS2, arr-3, and catB3, could be conjugated to EC C600 by horizontal transfer with an average efficiency of 3.2 × 10-5. The plasmid pEC16500 harboured similar backbones as p70_2_15, pECGD-8-33, pNCYU-29-19-1_MCR1, and pIBMC_mcr1, and was shown to be encoded within a type IV secretion system (T4SS)-containing 32.6 kbp IncX4, next to the pap2-like membrane-associated gene, to form a 2.4-kb cassette. Furthermore, sequencing and phylogenetic analyses revealed a similarity between other MCR-1-homolog proteins, indicating that the five E. coli isolates were colistin-resistant. CONCLUSION Our data represents a significant snapshot of colistin resistance mcr-1 genes and highlights the need to increase active surveillance, especially among children under five years of age, in Shanghai. Great effort needs to be taken to avoid further dissemination of plasmid-mediated colistin resistance among clinically relevant Gram-negative bacterial pathogens.
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Affiliation(s)
- Jun Feng
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai, People's Republic of China
| | - Yuan Zhuang
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai, People's Republic of China
| | - Jiayuan Luo
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai, People's Republic of China
| | - Quan Xiao
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai, People's Republic of China
| | - Yitong Wu
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai, People's Republic of China
| | - Yong Chen
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai, People's Republic of China
| | - Min Chen
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai, People's Republic of China.
| | - Xi Zhang
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai, People's Republic of China.
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Smith P, Le Devendec L, Jouy E, Larvor E, Le Breton A, Picon-Camacho S, Zrnčić S, Zupičić IG, Oraić D, Karataş S, Verner-Jeffreys D, Joseph AW, Light E, Essen-Zandbergen AV, van Gelderen B, Voorbergen-Laarman M, Haenen OLM, Veldman KT, Madsen L, Mouritsen KK, Smith Svanevik C, Håkonsholm F, Vela AI, García M, Florio D, Fioravanti M, Cortinovis L, Pretto T, Manfrin A, Baron S. Epidemiological cut-off values for Vibrio anguillarum MIC and disc diffusion data generated by standardised methods. Dis Aquat Organ 2023; 155:109-123. [PMID: 37650482 DOI: 10.3354/dao03745] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
Abstract
This work aims to generate the data needed to set epidemiological cut-off values for minimum inhibitory concentration (MIC) and disc-diffusion zone measurements of Vibrio anguillarum. A total of 261 unique isolates were tested, applying standard methods specifying incubation at 28°C for 24-28 h. Aggregated MIC distributions for a total of 247 isolates were determined in 9 laboratories for 11 agents. Data aggregations of the disc zone for the 10 agents analysed contained between 157 and 218 observations made by 4 to 7 laboratories. Acceptable ranges for quality control (QC) reference strains were available for 7 agents and the related multi-laboratory aggregated data were censored, excluding the data of a laboratory that failed to meet QC requirements. Statistical methods were applied to calculate epidemiological cut-off values. Cut-off values for MIC data were calculated for florfenicol (≤1 µg ml-1), gentamicin (≤4 µg ml-1), oxytetracycline (≤0.25 µg ml-1) and trimethoprim/sulfamethoxazole (≤0.125/2.38 µg ml-1). The cut-off values for disc zone data were calculated for enrofloxacin (≥29 mm), florfenicol (≥27 mm), gentamicin (≥19 mm), oxolinic acid (≥24 mm), oxytetracycline (≥24 mm) and trimethoprim/sulfamethoxazole (≥26 mm). MIC and disc-diffusion zone data for the other agents where not supported by QC, thus yielding only provisional cut-off values (meropenem, ceftazidime). Regardless of whether QC is available, some of the aggregated MIC distributions (enrofloxacin, oxolinic acid), disc zone (sulfamethoxazole), and MIC and disc-diffusion distributions (ampicillin, chloramphenicol) did not meet the statistical requirements. The data produced will be submitted to the Clinical Laboratory Standards Institute for their consideration in setting international consensus epidemiological cut-off values.
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Affiliation(s)
- Peter Smith
- School of Natural Science, University of Galway, Galway H91 TK33, Ireland
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Akram Asif A, Mahmood K, Riaz S, McHugh T, Sultan S. Bacterial ventriculoperitoneal shunt infections: changing trends in antimicrobial susceptibility, a 7-year retrospective study from Pakistan. Antimicrob Resist Infect Control 2023; 12:75. [PMID: 37553715 PMCID: PMC10408103 DOI: 10.1186/s13756-023-01283-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Accepted: 07/27/2023] [Indexed: 08/10/2023] Open
Abstract
BACKGROUND Ventriculoperitoneal (VP) shunt infections in adults represent a severe complication and make treatment more challenging. Therefore, drug susceptibility patterns are crucial for therapeutic decisions and infection control in neurosurgical centers. This 7-year retrospective study aimed to identify the bacteria responsible for adult VP shunt infections and determine their drug susceptibility patterns. METHODS This single-center study was performed from 2015 to 2021 in Lahore, Pakistan, and included CSF cultures from VP shunt infections. Demographic data, causative organisms, and antimicrobial susceptibility testing results were collected. Multivariate analysis of variance (MANOVA) and two-sample t-tests were used to analyze and compare the antibiotic sensitivity trends over the study period. RESULTS 14,473 isolates recovered from 13,937 CSF samples of VP shunt infections were identified and analyzed for their susceptibility patterns to antimicrobials. The proportion of Gram-negative and Gram-positive bacteria were 11,030 (76%) and 3443 (24)%, respectively. The predominant bacteria were Acinetobacter species (n = 5898, 41%), followed by Pseudomonas species (n = 2368, 16%) and coagulase-negative Staphylococcus (CoNS) (n = 1880, 13%). 100% of Staphylococcus aureus (S.aureus) and CoNS were sensitive to vancomycin and linezolid (n = 2580). However, 52% of S. aureus (719/1,343) were methicillin-resistant Staphylococcus aureus (MRSA). Acinetobacter showed maximum sensitivity to meropenem at 69% (2759/4768). Pseudomonas was 80% (1385/1863 sensitive to piperacillin-tazobactam, Escherichia coli (E. coli) showed 72% to amikacin (748/1055), while Klebsiella spp. was 57% (574/1170) sensitive to piperacillin-tazobactam. The sensitivity of piperacillin-tazobactam and meropenem for Gram-negative bacteria decreased significantly (p < 0.05) over 7 years, with 92.2% and 88.91% sensitive in 2015 and 66.7% and 62.8% sensitive in 2021, respectively. CONCLUSION The significant decrease in the effectiveness of carbapenem and beta-lactam/beta-lactamase inhibitor combination drugs for the common Gram-negative causative agents of VP shunt infections suggests that alternative antibiotics such as colistin, fosfomycin, ceftazidime/avibactam, ceftolozane/tazobactam, and tigecycline should be considered and in consequence included in testing panels. Additionally, it is recommended to adopt care bundles for the prevention of VP shunt infection.
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Affiliation(s)
- Amina Akram Asif
- University of the Punjab, Lahore, Pakistan.
- Lahore General Hospital, Punjab Institute of Neurosciences, Lahore, Pakistan.
| | - Khalid Mahmood
- Lahore General Hospital, Punjab Institute of Neurosciences, Lahore, Pakistan
| | - Saba Riaz
- University of the Punjab, Lahore, Pakistan
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Lin HH, Li JW, Yang TY, Lee CY, Jain SH, Lin SY, Lu PL. Emergence of a predominant sequence type ST7363 and the increasing trend of resistance to cefixime and ceftriaxone in Neisseria gonorrhoeae in Southern Taiwan, 2019-2021. J Microbiol Immunol Infect 2023; 56:833-841. [PMID: 37002111 DOI: 10.1016/j.jmii.2023.03.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 02/22/2023] [Accepted: 03/12/2023] [Indexed: 03/30/2023]
Abstract
BACKGROUND/PURPOSE Multi-drug resistance and the presence of epidemic lineages of Neisseria gonorrhoeae locally and globally were important clinical and public health issues. We aimed to investigate the molecular epidemiology and the antimicrobial susceptibility profiles of N. gonorrhoeae in Southern Taiwan. METHODS Between 2019 and 2021, adult patients who had suspected gonorrhea and attended a urology clinic in southern Taiwan were recruited to participate in this study. Clinical data from medical records and a questionnaire, antimicrobial susceptibility testing using a disk diffusion test in accordance with the guidelines by the Clinical and Laboratory Standards Institute, and Multi-locus sequence typing (MLST) were analyzed. RESULTS A total of 500 patients participated in the surveillance study. Among them, 232 N. gonorrhoeae isolates were identified, but only 164 isolates were recovered for further research. ST7363 (n = 83, 50.61%) was found to be the predominant sequence type, followed by ST1583 (n = 24, 14.63%), ST1588 (n = 13, 7.93%), and ST7827 (n = 12, 7.32%). 100% resistance to penicillin and 99.4% non-susceptible rate of ciprofloxacin were observed. The azithromycin resistant rate being 15.24% and the cefixime non-susceptible rate being 17.07% were alarming, both with decreasing trends in susceptibilities during 2019-2021. The 25 azithromycin resistant isolates were mainly belonged to ST7363 (n = 12) and ST7827 (n = 3). Seven (4.2%) isolates were ceftriaxone non-susceptible. Among them, four were assigned to be ST 7827 and three belonged to ST7363. CONCLUSION We observed the emergence of a predominant sequence type ST7363 in southern Taiwan. Compared with previous Taiwan studies, the increasing trend of resistance to cefixime and ceftriaxone necessitates clinicians' alertness for clinical treatment response of the extended spectrum cephalosporins and the further surveillance monitor.
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Affiliation(s)
- Hsuan-Han Lin
- School of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan; Division of General Medicine, Department of Medical Education, Shin Kong Wu Ho-Su Memorial Hospital, Taiwan
| | - Jia-Wen Li
- Fengshan Li Jiawen Urology Clinic, Kaohsiung, Taiwan
| | - Tsung-Ying Yang
- Center for Liquid Biopsy and Cohort Research, Kaohsiung Medical University, Kaohsiung, Taiwan; Department of Medical Laboratory Science, I-Shou University, Taiwan
| | - Chun-Yuan Lee
- Division of Infectious Diseases, Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan; College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan; Graduate Institute of Clinical Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan; M.Sc. Program in Tropical Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan, ROC
| | - Shu-Huei Jain
- Division of Infectious Diseases, Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
| | - Shang-Yi Lin
- Division of Infectious Diseases, Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan; College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan; Graduate Institute of Clinical Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan; Department of Laboratory Medicine, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
| | - Po-Liang Lu
- Center for Liquid Biopsy and Cohort Research, Kaohsiung Medical University, Kaohsiung, Taiwan; Division of Infectious Diseases, Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan; School of Post-Baccalaureate Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan; Department of Biological Science and Technology, College of Biological Science and Technology, National Yang Ming Chiao Tung University, Taiwan.
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Li Q, Li C, Ye Q, Gu Q, Wu S, Zhang Y, Wei X, Xue L, Chen M, Zeng H, Zhang J, Wu Q. Occurrence, molecular characterization and antibiotic resistance of Cronobacter spp. isolated from wet rice and flour products in Guangdong, China. Curr Res Food Sci 2023; 7:100554. [PMID: 37559946 PMCID: PMC10407891 DOI: 10.1016/j.crfs.2023.100554] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Revised: 06/27/2023] [Accepted: 07/23/2023] [Indexed: 08/11/2023] Open
Abstract
This study explored the prevalence of Cronobacter spp. in wet rice and flour products from Guangdong province, China, the molecular characteristics and antimicrobial susceptibility profiles of the isolates were identified. Among 249 samples, 100 (40.16%) were positive for Cronobacter spp., including 77 wet rice and 23 wet flour products. Eleven serotypes were characterized among 136 isolates with C. sakazakii O2 (n = 32) predominating. Forty-nine MLST patterns were assigned, 15 of which were new. C. sakazakii ST4 (n = 17) was the dominant ST, which is previously reported to have caused three deaths; followed by C. malonaticus ST7 (n = 15), which is connected to adult infections. All strains presented susceptibility to ampicillin/sulbactam, imipenem, aztreonam and trimethoprim/sulfamethoxazole. The isolates showed maximum resistance to cephalothin, and the resistance and intermediate rates were 91.91% and 3.68%, each. Two strains, croM234A1 and croM283-1, displayed resistance to three antibiotics. High contamination level and predominant number of pathogenic STs of Cronobacter in wet rice and flour products implied a potential risk to public healthiness. This survey could provide comprehensive information for establishing more targeted control methods for Cronobacter spp.
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Affiliation(s)
| | | | - Qinghua Ye
- Key Laboratory of Agricultural Microbiomics and Precision Application (MARA), Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, 510070, PR China
| | - Qihui Gu
- Key Laboratory of Agricultural Microbiomics and Precision Application (MARA), Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, 510070, PR China
| | - Shi Wu
- Key Laboratory of Agricultural Microbiomics and Precision Application (MARA), Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, 510070, PR China
| | - Youxiong Zhang
- Key Laboratory of Agricultural Microbiomics and Precision Application (MARA), Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, 510070, PR China
| | - Xianhu Wei
- Key Laboratory of Agricultural Microbiomics and Precision Application (MARA), Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, 510070, PR China
| | - Liang Xue
- Key Laboratory of Agricultural Microbiomics and Precision Application (MARA), Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, 510070, PR China
| | - Moutong Chen
- Key Laboratory of Agricultural Microbiomics and Precision Application (MARA), Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, 510070, PR China
| | - Haiyan Zeng
- Key Laboratory of Agricultural Microbiomics and Precision Application (MARA), Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, 510070, PR China
| | - Jumei Zhang
- Key Laboratory of Agricultural Microbiomics and Precision Application (MARA), Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, 510070, PR China
| | - Qingping Wu
- Key Laboratory of Agricultural Microbiomics and Precision Application (MARA), Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, 510070, PR China
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Miriti DM, Muthini JM, Nyamache AK. Study of bacterial respiratory infections and antimicrobial susceptibility profile among antibiotics naive outpatients visiting Meru teaching and referral hospital, Meru County, Kenya in 2018. BMC Microbiol 2023; 23:172. [PMID: 37386366 PMCID: PMC10308778 DOI: 10.1186/s12866-023-02905-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Accepted: 05/19/2023] [Indexed: 07/01/2023] Open
Abstract
OBJECTIVE Respiratory tract infections cause significant morbidity and mortality globally and are the most common infectious diseases in humans. This study aims at assessing the presence of bacterial respiratory infections, number of people infected and antimicrobial susceptibility profile among antibiotic naïve outpatients presenting with respiratory tract infections in Meru Teaching and Referral Hospital. METHODS The study was conducted in Meru Teaching and Referral Hospital, Meru County from April 2017 to August 2018. Upper respiratory infections were characterized by acute infection of nasal cavity, pharynx and larynx while lower respiratory infections were characterized by chest pains, prolonged cough, productive sputum, difficulty in breathing, fever and weight loss. A total of 384 sputum and throat samples were collected aseptically from patients who were clinically suspected to have respiratory infections and cultured in blood agar, MacConkey agar and chocolate agar. Bacterial isolates were identified by colonial morphology, Gram stain and confirmed by biochemical tests. Antimicrobial susceptibility profile was determined using agar disc diffusion method. RESULTS Respiratory bacterial pathogens were isolated in 45.6% of the samples. The prevalence of the bacteria species isolated were as follows Pseudomonas species (36.6%), Klebsiella species (20.6%), Staphylococcus aureus (16.6%), Streptococcus pyogenes (13.7%), Streptococcus pneumoniae (10.3%) and mixed isolates (2.3%). Amoxicillin and ampicillin recorded the highest resistance rate. Most of the isolates displayed high level of resistance to more than two antibiotics. Although multidrug resistance is reported in the study, gentamicin, amikacin and cefuroxime are recommended as the antibiotics of choice against bacterial isolates obtained. CONCLUSION Bacterial respiratory infections were prevalent in the study area and the isolates obtained showed resistance to commonly used antibiotics such as amoxicillin, ampicillin, ciprofloxacin piperacillin ciprofloxacin, ceftazidime, piperacillin-tazobactam and cephalexin. Therefore need for a continuous surveillance of antimicrobial resistance in management of respiratory infections in the study area.
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Affiliation(s)
- Dinah Muthoni Miriti
- Department of Biochemistry, Microbiology and Biotechnology, Kenyatta University, P.O Box 43844-00100, Nairobi, Kenya.
| | - John Maingi Muthini
- Department of Biochemistry, Microbiology and Biotechnology, Kenyatta University, P.O Box 43844-00100, Nairobi, Kenya
| | - Anthony Kebira Nyamache
- Department of Biochemistry, Microbiology and Biotechnology, Kenyatta University, P.O Box 43844-00100, Nairobi, Kenya
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Zúñiga MP, Badillo E, Abalos P, Valencia ED, Marín P, Escudero E, Galecio JS. Antimicrobial susceptibility of Rhodococcus equi strains isolated from foals in Chile. World J Microbiol Biotechnol 2023; 39:231. [PMID: 37347336 PMCID: PMC10287571 DOI: 10.1007/s11274-023-03677-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Accepted: 06/12/2023] [Indexed: 06/23/2023]
Abstract
Rhodococcus equi is responsible for foal pneumonia worldwide, with a significant economic impact on the production and breeding of horses. In Chile, the first case was reported in 2000, and since then, its incidence has been increasing. Distinctive characteristics of R. equi as an intracellular pathogen in macrophages, emergence of virulence plasmids encoding surface lipoprotein antigens, and appearance of antibiotic resistance against macrolides and rifampicin have significantly complicated the treatment of R. equi pneumonia in foals. Therefore, in vitro susceptibility studies of first-line and newer antibiotics against R. equi are the first step to establishing effective treatments and optimizing new therapeutic options. The aim of the present study is to determine the susceptibility profile of fourteen strains of R. equi isolated from foals in Chile to several antibiotics of the macrolide group including azithromycin, amikacin, tildipirosin and gamithromycin as well as others such as rifampicin, doxycycline and ceftiofur. Identification of R. equi in collected isolates from foals in Chile has been performed by CAMP test and PCR based on detecting of the gene encoding the 16 S rRNA. The presence of genes encoding virulence plasmids was also determined using PCR. Results obtained have demonstrated presence of virulent R. equi strains in Chile. In vitro susceptibility pattern to different antibiotics has shown better results for doxycycline and rifampicin similar to previous studies performed. Current macrolides have been evaluated in order to consider alternative treatment options in a context of emerging resistance to classic macrolides and rifampicin, obtaining better results with gamithromycin (MIC range of 0.125 to 128 mg/ml) than with tildipirosin (MIC range of 16 to 128 mg/ml). An adequate diagnosis of bacterial susceptibility based on antibiograms is necessary to treat the Rhodococcus equi infection in foals.
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Affiliation(s)
- María Paz Zúñiga
- Facultad de Agronomía y Veterinaria, Universidad Nacional de Rio Cuarto, Córdova, Argentina
- Escuela de Medicina Veterinaria, Facultad de Ciencias, Universidad Mayor, Santiago de Chile, Chile
| | - Elena Badillo
- Department of Pharmacology, Faculty of Veterinary Medicine, University of Murcia, Murcia, 30100, Spain
| | - Pedro Abalos
- Facultad de Ciencias Veterinarias y Pecuarias, Universidad de Chile, La Pintana, 8820808, Chile
| | - Eduardo David Valencia
- Instituto de Microbiología, Colegio de Ciencias Biológicas y Ambientales, Universidad San Francisco de Quito, Quito, EC, 170157, Ecuador
| | - Pedro Marín
- Department of Pharmacology, Faculty of Veterinary Medicine, University of Murcia, Murcia, 30100, Spain
| | - Elisa Escudero
- Department of Pharmacology, Faculty of Veterinary Medicine, University of Murcia, Murcia, 30100, Spain
| | - Juan Sebastian Galecio
- Department of Pharmacology, Faculty of Veterinary Medicine, University of Murcia, Murcia, 30100, Spain.
- Colegio de Ciencias de la Salud, Escuela de Medicina Veterinaria, Universidad San Francisco de Quito, Quito, EC, 170157, Ecuador.
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Yang CH, Kuo SF, Chen FJ, Lee CH. Clinical manifestations and outcome of nocardiosis and antimicrobial susceptibility of Nocardia species in southern Taiwan, 2011-2021. J Microbiol Immunol Infect 2023; 56:382-391. [PMID: 36456442 DOI: 10.1016/j.jmii.2022.11.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2022] [Revised: 10/15/2022] [Accepted: 11/12/2022] [Indexed: 11/18/2022]
Abstract
BACKGROUND/PURPOSE Nocardiosis is an uncommon infectious disease. This study aimed to assess the clinical outcome of patients with nocardiosis and examine the antimicrobial susceptibility profiles of Nocardia spp. isolated. METHODS We retrospectively reviewed the medical records of all inpatients diagnosed with nocardiosis between 2011 and 2021. The identification of Nocardia spp. at the species level was performed with the use of MALDI-TOF and 16S rRNA assays. The antimicrobial susceptibility of Nocardia spp. was performed using the microbroth dilution method. Factors associated with 90-day all-cause mortality were identified in multivariate logistic regression analysis. RESULTS Of 60 patients with nocardiosis in the 11-year study period, the lungs (55.0%) were the most common site of involvement, followed by the skin and soft tissue (45.0%). Twenty-two patients (36.7%) died within 90 days following the diagnosis. All of the Nocardia isolates were susceptible to trimethoprim-sulfamethoxazole, linezolid, and amikacin, whereas more than 70% of the isolates were not susceptible to ciprofloxacin, imipenem-cilastatin, moxifloxacin, cefepime, and clarithromycin. Nocardiosis involving the lungs (relative risk [RR], 9.99; 95% confidence interval [CI], 1.52-65.50; p = 0.02), nocardiosis involving the skin and soft tissue (RR, 0.15; 95% CI, 0.02-0.92; p = 0.04), and treatment with trimethoprim-sulfamethoxazole (RR, 0.14; 95% CI, 0.03-0.67; p = 0.01) were independently associated with 90-day all-cause mortality. CONCLUSIONS Nocardia spp. identified between 2011 and 2021 remained fully susceptible to trimethoprim-sulfamethoxazole, linezolid, and amikacin. Nocardiosis of the lungs, skin and soft tissue infection, and treatment with trimethoprim-sulfamethoxazole were independently associated with 90-day all-cause mortality.
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Affiliation(s)
- Chen-Hsun Yang
- Division of Infectious Diseases, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan
| | - Shu-Fang Kuo
- Department of Laboratory Medicine, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan; Department of Laboratory Medicine, Chiayi Chang Gung Memorial Hospital, Chiayi, Taiwan; Department of Medical Biotechnology and Laboratory Sciences, College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Fang-Ju Chen
- Division of Infectious Diseases, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan
| | - Chen-Hsiang Lee
- Division of Infectious Diseases, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan; Chang Gung University College of Medicine, Kaohsiung, Taiwan; Division of Infectious Diseases, Department of Internal Medicine, Chiayi Chang Gung Memorial Hospital, Chiayi, Taiwan.
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Huang H, Lin CY, Chiu NC, Huang DT, Huang CY, Chi H. Antimicrobial susceptibility and serotype replacement of Streptococcus pneumoniae in children before and after PCV13 introduction in Taiwan. J Microbiol Immunol Infect 2023; 56:299-310. [PMID: 36127232 DOI: 10.1016/j.jmii.2022.08.018] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Revised: 08/31/2022] [Accepted: 08/31/2022] [Indexed: 11/23/2022]
Abstract
BACKGROUND Since 2015, 13-valent pneumococcal conjugate vaccine (PCV13) was included in the national immunization program in Taiwan. Subsequently, the serotypes of the main circulating Streptococcus pneumoniae strains have changed. PCV administration is also associated with changes in the antimicrobial susceptibility of S. pneumoniae strains. Therefore, in this study, we analyzed the serotype distribution and antimicrobial susceptibility of S. pneumoniae in pediatric infections. METHODS Children with S. pneumoniae infections, including invasive pneumococcal disease (IPD) and non-IPD, were enrolled from January 2010 to December 2020. The samples were collected from Mackay Memorial Hospital, MacKay Children's Hospital, and Hsinchu Mackay Hospital in Taiwan. We analyzed the epidemiology of sample collection site, infection diagnosis, and the serotype and antimicrobial susceptibility of S. pneumoniae strains. The study period was divided into time points before and after PCV13 administration. RESULTS In total, 322 isolates were collected during the study period. The incidence of IPD declined annually, from 29.7% before 2015 to 7.3% after 2015 (p < 0.001). The prevalence of serotype 19 A had increased gradually since 2010 but declined rapidly after 2013. Serotypes 15 A and 23 A were the most common serotypes after 2015. The non-susceptibility of the S. pneumoniae isolates to penicillin, cefotaxime, and ceftriaxone decreased. Based on meningitis breakpoints, the non-susceptibility to cefotaxime and ceftriaxone gradually decreased, but increased in 2020. CONCLUSION PCV13 was considerably effective in reducing the incidence of IPD in children; however, the prevalence of serotypes 15 A and 23 A increased. The increase in antimicrobial non-susceptibility caused by non-vaccine serotypes must be continuously monitored.
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Karahan ZC, Altinsoy İ, Çalişkan BN, Dede S, Kayiş G, Türkoğlu HC, Evren E, Doğanay Erdoğan B, Kiliç SG, Dolapçi İ, Tekeli A. Investigation of the presence of Capnophilic bacteria in routine urine cultures. Eur J Clin Microbiol Infect Dis 2023; 42:519-524. [PMID: 36811709 DOI: 10.1007/s10096-023-04570-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2022] [Accepted: 02/13/2023] [Indexed: 02/24/2023]
Abstract
Capnophilic Escherichia coli (CEC) strains are rarely isolated from urinary tract infections (UTIs). The purpose of this research was to look into the incidence and traits of the CEC strains that cause UTIs. Nine (0.11%) epidemiologically unrelated CEC isolates with varying antibiotic susceptibility patterns were identified from patients with various co-morbidities after the evaluation of 8500 urine samples. Three of these strains belonged to the O25b-ST131 clone, and none of them possessed the yadF gene. Due to adverse incubation conditions, CEC isolation is difficult. Although rare, capnophilic incubation of urine cultures may be considered particularly for patients with underlying predisposing conditions.
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Affiliation(s)
- Zeynep Ceren Karahan
- Department of Medical Microbiology, Ankara University School of Medicine, Ankara, Turkey.
- Central Microbiology Laboratory, Ibn-I Sina Hospital, Ankara University School of Medicine, Ankara, Turkey.
| | - İrem Altinsoy
- Ankara University School of Medicine, Ankara, Turkey
| | | | - Sıla Dede
- Ankara University School of Medicine, Ankara, Turkey
| | - Görkem Kayiş
- Ankara University School of Medicine, Ankara, Turkey
| | | | - Ebru Evren
- Department of Medical Microbiology, Ankara University School of Medicine, Ankara, Turkey
- Central Microbiology Laboratory, Ibn-I Sina Hospital, Ankara University School of Medicine, Ankara, Turkey
| | | | - Selin Gamze Kiliç
- Department of Medical Microbiology, Ankara University School of Medicine, Ankara, Turkey
| | - İştar Dolapçi
- Department of Medical Microbiology, Ankara University School of Medicine, Ankara, Turkey
| | - Alper Tekeli
- Department of Medical Microbiology, Ankara University School of Medicine, Ankara, Turkey
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Pereira MMR, de Oliveira FM, da Costa AC, Junqueira-Kipnis AP, Kipnis A. Ferritin from Mycobacterium abscessus is involved in resistance to antibiotics and oxidative stress. Appl Microbiol Biotechnol 2023; 107:2577-2595. [PMID: 36862179 DOI: 10.1007/s00253-023-12420-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 01/22/2023] [Accepted: 01/30/2023] [Indexed: 03/03/2023]
Abstract
Mycobacterium abscessus subsp. massiliense (Mycma) is a rapidly growing Mycobacterium belonging to the M. abscessus complex that is often associated with lung and soft tissue infection outbreaks. Mycma is resistant to many antimicrobials, including those used for treating tuberculosis. Therefore, Mycma infections are difficult to treat and may lead to high infectious complication rates. Iron is essential for bacterial growth and establishment of infection. During infection, the host reduces iron concentrations as a defense mechanism. To counteract the host-induced iron deficiency, Mycma produces siderophores to capture iron. Mycma has two ferritins (encoded by mycma_0076 and mycma_0077) modulated by different iron concentrations, which allow the survival of this pathogen during iron scarcity. In this study, we constructed knockout (Mycma 0076KO) and complemented (Mycma 0076KOc) gene strains for mycma_0076 to understand the function of 0076 ferritin. Deletion of mycma_0076 in Mycma led to the transition in colony morphology from smooth to rough, alteration of the glycopeptidolipids spectra, increased permeability of the envelope, reduction in biofilm formation, increased susceptibility to antimicrobials and hydrogen peroxide-induced oxidative stress, and decreased internalization by macrophages. This study shows that Mycma_0076 ferritin in Mycma is involved in resistance to oxidative stress and antimicrobials, and alteration of cell envelope architecture. KEY POINTS: • Deletion of the mycma_0076 gene altered colony morphology to rough; • Mycma 0076KO changed GPL profile; • Absence of Mycma_0076 ferritin results in increased susceptibility to antimicrobials and oxidative stress in Mycma. Legend: a In wild-type M. abscessus subsp. massiliense strain, iron is captured from the environment by carboxymycobactins and mycobactins (1). Iron-dependent regulator (IdeR) proteins bind to ferrous iron (Fe+2) in the bacterial cytoplasm leading to the activation of the IdeR-Fe+2 complex (2). The activated complex binds to the promoter regions of iron-dependent genes, called iron box, which in turn help in the recruitment of RNA polymerase to promote transcription of genes such as mycma_0076 and mycma_0077 ferritin genes (3). Mycma_0076 and Mycma_0077 ferritins bind to excess iron in the medium and promote Fe2+ oxidation into ferric iron (Fe3+) and store iron molecules to be released under iron scarcity conditions. (4) Genes related to biosynthesis and transport of glycopeptidolipids (GPL) are expressed normally and the cell envelope is composed of different GPL species (colored squares represented on the cell surface (GPLs). Consequently, WT Mycma present smooth colony phenotype (5). b In Mycma 0076KO strain, the lack of ferritin 0076 causes overexpression of mycma_0077 (6), but does not restore wild-type iron homeostasis and thus may result in free intracellular iron, even in the presence of miniferritins (MaDps). The excess iron potentiates oxidative stress (7) by generating hydroxyl radicals through Fenton Reaction. During this process, through an unknown mechanism, that could involve Lsr2 (8), the expression of GPL synthesis locus is regulated positively and/or negatively, resulting in alteration of GPL composition in the membrane (as represented by different colors of squares on the cell surface), resulting in a rough colony phenotype (9). The changes of GPL can increase cell wall permeability, contributing to antimicrobial susceptibility (10).
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Affiliation(s)
- Maria Micaella Rodrigues Pereira
- Institute of Tropical Pathology and Public Health, Federal University of Goiás, Goiânia, GO, Brazil
- Tropical Medicine and Public Health Graduate Program at Federal, University of Goiás, Goiânia, GO, Brazil
| | - Fábio Muniz de Oliveira
- Institute of Tropical Pathology and Public Health, Federal University of Goiás, Goiânia, GO, Brazil
- Tropical Medicine and Public Health Graduate Program at Federal, University of Goiás, Goiânia, GO, Brazil
- Indiana Center for Regenerative Medicine and Engineering, School of Medicine, Indiana University, Indianapolis, IN, USA
| | | | | | - André Kipnis
- Institute of Tropical Pathology and Public Health, Federal University of Goiás, Goiânia, GO, Brazil.
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