1
|
Das S, Maiti S, Mukhopadhyay B. Chemical synthesis of 6-deoxy-D-talose containing a tetrasaccharide repeating unit of the O-specific polysaccharide from Enterobacter cloacae G3422 in the form of its 2-aminoethyl glycoside. Org Biomol Chem 2024; 22:2414-2422. [PMID: 38414386 DOI: 10.1039/d4ob00183d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/29/2024]
Abstract
Chemical synthesis of the tetrasaccharide repeating unit of the O-specific polysaccharide from Enterobacter cloacae G3422 is reported. The synthesis of the target tetrasaccharide is achieved through a convergent [2 + 2]-block strategy. The conjugation ready target oligosaccharide is attractive for further glycoconjugate formation with a suitable aglycon. Synthesis of the challenging 6-deoxy-L-talose moiety is reported using two different approaches and the obvious difficulties are discussed.
Collapse
Affiliation(s)
- Subrata Das
- Sweet Lab, Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, Nadia, 741246, India.
| | - Sanajit Maiti
- Sweet Lab, Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, Nadia, 741246, India.
| | - Balaram Mukhopadhyay
- Sweet Lab, Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, Nadia, 741246, India.
| |
Collapse
|
2
|
Rivera-Izquierdo M. Alarming increase in hospital outbreaks of carbapenemase-producing Enterobacter cloacae in Southern Spain. J Hosp Infect 2024; 145:224-225. [PMID: 38040035 DOI: 10.1016/j.jhin.2023.11.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2023] [Accepted: 11/26/2023] [Indexed: 12/03/2023]
Affiliation(s)
- M Rivera-Izquierdo
- Department of Preventive Medicine and Public Health, University of Granada, Granada, Spain; Service of Preventive Medicine and Public Health, Hospital Universitario San Cecilio, Granada, Spain; Instituto de investigación biosanitaria de Granada, ibs.GRANADA, Granada, Spain; CIBER de Epidemiología y Salud Pública (CIBERESP), Madrid, Spain.
| |
Collapse
|
3
|
Hu P, Chen H, Zhao D, Ma Z, Zeng W, Han Y, Zhou T, Cao J, Shen M. Azomycin Orchestrate Colistin-Resistant Enterobacter cloacae Complex's Colistin Resistance Reversal In Vitro and In Vivo. ACS Infect Dis 2024; 10:662-675. [PMID: 38294410 DOI: 10.1021/acsinfecdis.3c00526] [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] [Indexed: 02/01/2024]
Abstract
The Enterobacter cloacae complex (ECC) is a group of nosocomial pathogens that pose a challenge in clinical treatment due to its intrinsic resistance and the ability to rapidly acquire resistance. Colistin was reconsidered as a last-resort antibiotic for combating multidrug-resistant ECC. However, the persistent emergence of colistin-resistant (COL-R) pathogens impedes its clinical efficacy, and novel treatment options are urgently needed. We propose that azomycin, in combination with colistin, restores the susceptibility of COL-R ECC to colistin in vivo and in vitro. Results from the checkerboard susceptibility, time-killing, and live/dead bacterial cell viability tests showed strong synergistic antibacterial activity in vitro. Animal infection models suggested that azomycin-colistin enhanced the survival rate of infected Galleria mellonella and reduced the bacterial load in the thighs of infected mice, highlighting its superior in vivo synergistic antibacterial activity. Crystal violet staining and scanning electron microscopy unveiled the in vitro synergistic antibiofilm effects of azomycin-colistin. The safety of azomycin and azomycin-colistin at experimental concentrations was confirmed through cytotoxicity tests and an erythrocyte hemolysis test. Azomycin-colistin stimulated the production of reactive oxygen species in COL-R ECC and inhibited the PhoPQ two-component system to combat bacterial growth. Thus, azomycin is feasible as a colistin adjuvant against COL-R ECC infection.
Collapse
Affiliation(s)
- Panjie Hu
- Department of Clinical Laboratory, Key Laboratory of Clinical Laboratory Diagnosis and Translational Research of Zhejiang Province, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
- School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou 325035, Zhejiang, China
| | - Huanchang Chen
- Department of Clinical Laboratory, Key Laboratory of Clinical Laboratory Diagnosis and Translational Research of Zhejiang Province, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
| | - Deyi Zhao
- School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou 325035, Zhejiang, China
| | - Zhexiao Ma
- School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou 325035, Zhejiang, China
| | - Weiliang Zeng
- Department of Clinical Laboratory, Key Laboratory of Clinical Laboratory Diagnosis and Translational Research of Zhejiang Province, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
| | - Yijia Han
- School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou 325035, Zhejiang, China
| | - Tieli Zhou
- Department of Clinical Laboratory, Key Laboratory of Clinical Laboratory Diagnosis and Translational Research of Zhejiang Province, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
| | - Jianming Cao
- School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou 325035, Zhejiang, China
| | - Mo Shen
- Department of Clinical Laboratory, Key Laboratory of Clinical Laboratory Diagnosis and Translational Research of Zhejiang Province, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
| |
Collapse
|
4
|
Kusumoto M, Jitsuiki M, Motegi T, Harada K. Pharmacokinetic and Pharmacodynamic Analysis of the Oxacephem Antibiotic Flomoxef against Extended-Spectrum β-Lactamase-Producing Enterobacterales from Dogs. Int J Mol Sci 2024; 25:1105. [PMID: 38256182 PMCID: PMC10816067 DOI: 10.3390/ijms25021105] [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: 12/21/2023] [Revised: 01/12/2024] [Accepted: 01/15/2024] [Indexed: 01/24/2024] Open
Abstract
Flomoxef (FMX) may be a potential alternative to carbapenems for dogs infected with Enterobacterales-producing extended-spectrum β-lactamase (ESBL-E). However, the appropriate dosage of FMX in dogs with ESBL-E infections has yet to be established. This study was carried out to establish appropriate treatment regimens for FMX against ESBL-E infections in dogs using a pharmacokinetics-pharmacodynamics (PK-PD) approach. Five dogs were intravenously administered at a bolus dose of FMX (40 mg/kg body weight). Serum concentrations of FMX were calculated with high-performance liquid chromatography-tandem mass spectrometry, and then applied to determine PK indices based on a non-compartmental model. The cumulative fraction of response (CFR) was estimated based on the dissemination of minimum inhibitory concentrations among wild-type ESBL-E from companion animals. From the results, the dosage regimens of 40 mg/kg every 6 and 8 h were estimated to attain a CFR of >90% for wild-type isolates of ESBL-producing Escherichia coli, Klebsiella pneumoniae, and Proteus mirabilis for dogs. By contrast, all regimens had a CFR of <80% for ESBL-producing Enterobacter cloacae. Our results indicated that dosage regimens of 40 mg/kg FMX every 6 and 8 h can be a non-carbapenem treatment for canine infections of ESBL-producing Escherichia coli, Klebsiella pneumoniae, and Proteus mirabilis, but not for those of ESBL-producing Enterobacter cloacae.
Collapse
Affiliation(s)
- Mizuki Kusumoto
- Laboratory of Veterinary Internal Medicine, Tottori University, Minami 4-101, Koyama-Cho, Tottori-shi, Tottori 680-8550, Japan
- Joint Graduate School of Veterinary Sciences, Tottori University, Minami 4-101, Koyama-Cho, Tottori-shi, Tottori 680-8550, Japan
| | - Makoto Jitsuiki
- Laboratory of Veterinary Internal Medicine, Tottori University, Minami 4-101, Koyama-Cho, Tottori-shi, Tottori 680-8550, Japan
| | - Tomoki Motegi
- Department of Veterinary Clinical Pathobiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Yayoi 1-1-1, Bunkyo-Ku, Tokyo 113-0032, Japan;
| | - Kazuki Harada
- Laboratory of Veterinary Internal Medicine, Tottori University, Minami 4-101, Koyama-Cho, Tottori-shi, Tottori 680-8550, Japan
- Joint Graduate School of Veterinary Sciences, Tottori University, Minami 4-101, Koyama-Cho, Tottori-shi, Tottori 680-8550, Japan
| |
Collapse
|
5
|
Lazarus JE, Wang Y, Waldor MK, Hooper DC. Divergent genetic landscapes drive lower levels of AmpC induction and stable de-repression in Serratia marcescens compared to Enterobacter cloacae. Antimicrob Agents Chemother 2024; 68:e0119323. [PMID: 38084952 PMCID: PMC10777825 DOI: 10.1128/aac.01193-23] [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: 09/14/2023] [Accepted: 11/21/2023] [Indexed: 01/11/2024] Open
Abstract
The chromosomally encoded AmpC beta-lactamase is widely distributed throughout the Enterobacterales. When expressed at high levels through transient induction or stable de-repression, resistance to ceftriaxone, a commonly used antibiotic, can develop. Recent clinical guidance suggests, based on limited evidence, that resistance may be less likely to develop in Serratia marcescens compared to the better-studied Enterobacter cloacae and recommends that ceftriaxone may be used if the clinical isolate tests susceptible. We sought to generate additional data relevant to this recommendation. AmpC de-repression occurs predominantly because of mutation in the ampD peptidoglycan amidohydrolase. We find that, in contrast to E. cloacae, where deletion of ampD results in high-level ceftriaxone resistance (with ceftriaxone MIC = 96 µg/mL), in S. marcescens deletion of two amidohydrolases (ampD and amiD2) is necessary for AmpC de-repression, and the resulting ceftriaxone MIC is 1 µg/mL. Two mechanisms for this difference were identified. We find both a higher relative increase in ampC transcript level in E. cloacae ΔampD compared to S. marcescens ΔampDΔamiD2, as well as higher in vivo efficiency of ceftriaxone hydrolysis by the E. cloacae AmpC enzyme compared to the S. marcescens AmpC enzyme. We also observed higher relative levels of transient AmpC induction in E. cloacae vs S. marcescens when exposed to ceftriaxone. In time-kill curves, this difference translates into the survival of E. cloacae but not S. marcescens at clinically relevant ceftriaxone concentrations. In summary, our findings can explain the decreased propensity for on-treatment ceftriaxone resistance development in S. marcescens, thereby supporting recently issued clinical guidance.
Collapse
Affiliation(s)
- Jacob E. Lazarus
- Department of Medicine, Division of Infectious Diseases, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Yin Wang
- Department of Medicine, Division of Infectious Diseases, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Matthew K. Waldor
- Department of Medicine, Division of Infectious Diseases, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
- Department of Microbiology, Harvard Medical School, Boston, Massachusetts, USA
- Howard Hughes Medical Institute, Boston, Massachusetts, USA
| | - David C. Hooper
- Department of Medicine, Division of Infectious Diseases, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
| |
Collapse
|
6
|
Ali SF, Teh SH, Yang HH, Tsai YC, Chao HJ, Peng SS, Chen SC, Lin LC, Lin NT. Therapeutic Potential of a Novel Lytic Phage, vB_EclM_ECLFM1, against Carbapenem-Resistant Enterobacter cloacae. Int J Mol Sci 2024; 25:854. [PMID: 38255926 PMCID: PMC10815064 DOI: 10.3390/ijms25020854] [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: 11/22/2023] [Revised: 01/04/2024] [Accepted: 01/04/2024] [Indexed: 01/24/2024] Open
Abstract
The global rise of multidrug-resistant Enterobacter cloacae strains, especially those that are resistant to carbapenems and produce metallo-β-lactamases, poses a critical challenge in clinical settings owing to limited treatment options. While bacteriophages show promise in treating these infections, their use is hindered by scarce resources and insufficient genomic data. In this study, we isolated ECLFM1, a novel E. cloacae phage, from sewage water using a carbapenem-resistant clinical strain as the host. ECLFM1 exhibited rapid adsorption and a 15-min latent period, with a burst size of approximately 75 PFU/infected cell. Its genome, spanning 172,036 bp, was characterized and identified as a member of Karamvirus. In therapeutic applications, owing to a high multiplicity of infection, ECLFM1 showed increased survival in zebrafish infected with E. cloacae. This study highlights ECLFM1's potential as a candidate for controlling clinical E. cloacae infections, which would help address challenges in treating multidrug-resistant strains and contribute to the development of alternative treatments.
Collapse
Affiliation(s)
- Saieeda Fabia Ali
- Master Program in Biomedical Sciences, School of Medicine, Tzu Chi University, No. 701, Sec. 3, Zhongyang Rd., Hualien 97004, Taiwan;
| | - Soon-Hian Teh
- Division of Infectious Diseases, Department of Internal Medicine, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, No. 707, Sec. 3, Zhongyang Rd., Hualien 97002, Taiwan;
| | - Hsueh-Hui Yang
- Department of Medical Research, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, No. 707, Sec. 3, Zhongyang Rd., Hualien 97002, Taiwan;
| | - Yun-Chan Tsai
- Department of Life Sciences, College of Medicine, Tzu Chi University, No. 701, Sec. 3, Zhongyang Rd., Hualien 97004, Taiwan;
| | - Huei-Jen Chao
- Department of Laboratory Medicine, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, No. 707, Sec. 3, Zhongyang Rd., Hualien 97002, Taiwan; (H.-J.C.); (S.-S.P.); (S.-C.C.)
| | - Si-Shiuan Peng
- Department of Laboratory Medicine, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, No. 707, Sec. 3, Zhongyang Rd., Hualien 97002, Taiwan; (H.-J.C.); (S.-S.P.); (S.-C.C.)
| | - Shu-Chen Chen
- Department of Laboratory Medicine, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, No. 707, Sec. 3, Zhongyang Rd., Hualien 97002, Taiwan; (H.-J.C.); (S.-S.P.); (S.-C.C.)
| | - Ling-Chun Lin
- Master Program in Biomedical Sciences, School of Medicine, Tzu Chi University, No. 701, Sec. 3, Zhongyang Rd., Hualien 97004, Taiwan;
| | - Nien-Tsung Lin
- Master Program in Biomedical Sciences, School of Medicine, Tzu Chi University, No. 701, Sec. 3, Zhongyang Rd., Hualien 97004, Taiwan;
| |
Collapse
|
7
|
Barceló IM, Escobar-Salom M, Jordana-Lluch E, Torrens G, Oliver A, Juan C. Filling knowledge gaps related to AmpC-dependent β-lactam resistance in Enterobacter cloacae. Sci Rep 2024; 14:189. [PMID: 38167986 PMCID: PMC10762043 DOI: 10.1038/s41598-023-50685-1] [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: 11/17/2023] [Accepted: 12/22/2023] [Indexed: 01/05/2024] Open
Abstract
Enterobacter cloacae starred different pioneer studies that enabled the development of a widely accepted model for the peptidoglycan metabolism-linked regulation of intrinsic class C cephalosporinases, highly conserved in different Gram-negatives. However, some mechanistic and fitness/virulence-related aspects of E. cloacae choromosomal AmpC-dependent resistance are not completely understood. The present study including knockout mutants, β-lactamase cloning, gene expression analysis, characterization of resistance phenotypes, and the Galleria mellonella infection model fills these gaps demonstrating that: (i) AmpC enzyme does not show any collateral activity impacting fitness/virulence; (ii) AmpC hyperproduction mediated by ampD inactivation does not entail any biological cost; (iii) alteration of peptidoglycan recycling alone or combined with AmpC hyperproduction causes no attenuation of E. cloacae virulence in contrast to other species; (iv) derepression of E. cloacae AmpC does not follow a stepwise dynamics linked to the sequential inactivation of AmpD amidase homologues as happens in Pseudomonas aeruginosa; (v) the enigmatic additional putative AmpC-type β-lactamase generally present in E. cloacae does not contribute to the classical cephalosporinase hyperproduction-based resistance, having a negligible impact on phenotypes even when hyperproduced from multicopy vector. This study reveals interesting particularities in the chromosomal AmpC-related behavior of E. cloacae that complete the knowledge on this top resistance mechanism.
Collapse
Affiliation(s)
- Isabel M Barceló
- Health Research Institute of the Balearic Islands (IdISBa), 07010, Palma, Spain
- Microbiology Department, University Hospital Son Espases (HUSE), 07010, Palma, Spain
- Centro de Investigación Biomédica en Red, Área Enfermedades Infecciosas (CIBERINFEC), Instituto de Salud Carlos III, 28029, Madrid, Spain
| | - María Escobar-Salom
- Health Research Institute of the Balearic Islands (IdISBa), 07010, Palma, Spain
- Microbiology Department, University Hospital Son Espases (HUSE), 07010, Palma, Spain
- Centro de Investigación Biomédica en Red, Área Enfermedades Infecciosas (CIBERINFEC), Instituto de Salud Carlos III, 28029, Madrid, Spain
| | - Elena Jordana-Lluch
- Health Research Institute of the Balearic Islands (IdISBa), 07010, Palma, Spain
- Microbiology Department, University Hospital Son Espases (HUSE), 07010, Palma, Spain
- Centro de Investigación Biomédica en Red, Área Enfermedades Infecciosas (CIBERINFEC), Instituto de Salud Carlos III, 28029, Madrid, Spain
| | - Gabriel Torrens
- Department of Molecular Biology and Laboratory for Molecular Infection Medicine Sweden (MIMS), Umeå Centre for Microbial Research (UCMR), Umeå University, 901 87, Umeå, Sweden
| | - Antonio Oliver
- Health Research Institute of the Balearic Islands (IdISBa), 07010, Palma, Spain
- Microbiology Department, University Hospital Son Espases (HUSE), 07010, Palma, Spain
- Centro de Investigación Biomédica en Red, Área Enfermedades Infecciosas (CIBERINFEC), Instituto de Salud Carlos III, 28029, Madrid, Spain
| | - Carlos Juan
- Health Research Institute of the Balearic Islands (IdISBa), 07010, Palma, Spain.
- Microbiology Department, University Hospital Son Espases (HUSE), 07010, Palma, Spain.
- Centro de Investigación Biomédica en Red, Área Enfermedades Infecciosas (CIBERINFEC), Instituto de Salud Carlos III, 28029, Madrid, Spain.
| |
Collapse
|
8
|
Nasr-Eldin MA, Gamal E, Hazza M, Abo-Elmaaty SA. Isolation, characterization, and application of lytic bacteriophages for controlling Enterobacter cloacae complex (ECC) in pasteurized milk and yogurt. Folia Microbiol (Praha) 2023; 68:911-924. [PMID: 37184760 PMCID: PMC10689537 DOI: 10.1007/s12223-023-01059-7] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Accepted: 04/21/2023] [Indexed: 05/16/2023]
Abstract
Reducing bacterial pathogen contamination not only improves overall global public health but also diminishes food waste and loss. The use of lytic bacteriophages (phages) that infect and kill bacteria could be a beneficial tool for suppressing bacterial growth during dairy products storage time. Four Enterobacter cloacae (E. cloacae) complex isolates which were previously isolated from contaminated dairy products were used to identify lytic phages in wastewater. Phages specific to multi-drug resistant (MDR) E. cloacae complex 6AS1 were isolated from local sewage. Two novel phages vB_EclM-EP1 and vB_EclM-EP2 were identified as myoviral particles and have double-stranded DNA genome. Their host range and lytic capabilities were detected using spot test and efficiency of plating (EOP) against several bacterial isolates. The phages had a latent period of 30 min, and a large burst size of about 100 and 142 PFU/cell for vB_EclM-EP1 and vB_EclM-EP2, respectively. Both phages were viable at pH ranging 5-9 and stable at 70 °C for 60 min. The individual phages and their cocktail preparations (vB_EclM-EP1 and vB_EclM-EP2) reduced and inhibited the growth of E. cloacae complex 6AS1 during challenge test in milk and yogurt samples. These results indicate that the E. cloacae complex-specific phages (vB_EclM-EP1 and vB_EclM-EP2) have a potential application as microbicidal agents in packaged milk and milk derivatives during storage time. In addition, our environment is a rich sources of lytic phages which have potential use in eliminating multidrug-resistant isolates in food industry as well as in biocontrol.
Collapse
Affiliation(s)
- Mohamed A Nasr-Eldin
- Department of Botany and Microbiology, Faculty of Science, Benha University, Benha, 13511, Egypt.
| | - Eman Gamal
- Department of Botany and Microbiology, Faculty of Science, Benha University, Benha, 13511, Egypt
| | - Mahmoud Hazza
- Department of Botany and Microbiology, Faculty of Science, Benha University, Benha, 13511, Egypt
| | - Sabah A Abo-Elmaaty
- Department of Botany and Microbiology, Faculty of Science, Benha University, Benha, 13511, Egypt
| |
Collapse
|
9
|
Ashkenazi I, Morgan S, Snir N, Gold A, Dekel M, Warschawski Y. Outcomes of Enterobacter cloacae-Associated Periprosthetic Joint Infection Following Hip Arthroplasties. Clin Orthop Surg 2023; 15:902-909. [PMID: 38045589 PMCID: PMC10689214 DOI: 10.4055/cios23102] [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] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 05/05/2023] [Accepted: 05/06/2023] [Indexed: 12/05/2023] Open
Abstract
Background Periprosthetic joint infections (PJIs) represent a serious complication following total hip arthroplasty (THA) and are associated with significant morbidity. While recent data suggest that Enterobacter cloacae is an emerging source of PJI, characteristics and outcomes of E. cloacae-associated infections are rarely described. The study aimed to present and describe the findings and outcomes of E. cloacae-associated PJI in our department. Methods This is a retrospective descriptive study of patients who underwent revision THA for E. cloacae-associated PJI between 2011 and 2020 and has a minimum follow-up of 2 years. Outcomes included organism characteristics as well as clinical outcomes, represented by the number of reoperations needed for PJI eradication and the Musculoskeletal Infection Society (MSIS) outcome reporting tool score. Of 108 revision THAs, 12 patients (11.1%) were diagnosed with E. cloacae-associated PJI. Results The majority of cases had a polymicrobial PJI (n=8, 66.7%). Five E. cloacae strains (41.7%) were gentamicin-resistant. Six patients (50.0%) underwent 2 or more revisions, while 3 of them (25.0%) required 4 or more revisions until their PJI was resolved. When utilizing the MSIS outcome score, the first surgical intervention was considered successful (MSIS score tiers 1 and 2) for 5 patients (41.7%) and failed (tiers 3 and 4) for 7 patients (58.3%). Conclusions E. cloacae is emerging as a common source of PJI following hip arthroplasty procedures. The findings of our study suggest that this pathogen is primarily of polymicrobial nature and represents high virulence and poor postoperative outcomes, as represented by both an increased number of required revision procedures and high rates of patients with MSIS outcome scores of 3 and 4. When managing patients with E. cloacae-associated PJI, surgeons should consider these characteristics and inform patients regarding predicted outcomes.
Collapse
Affiliation(s)
- Itay Ashkenazi
- Division of Orthopedics, Tel Aviv Sourasky Medical Center, Tel-Aviv, Israel
- Sackler Faculty of Medicine, Tel Aviv University, Tel-Aviv, Israel
| | - Samuel Morgan
- Sackler Faculty of Medicine, Tel Aviv University, Tel-Aviv, Israel
| | - Nimrod Snir
- Division of Orthopedics, Tel Aviv Sourasky Medical Center, Tel-Aviv, Israel
- Sackler Faculty of Medicine, Tel Aviv University, Tel-Aviv, Israel
| | - Aviram Gold
- Division of Orthopedics, Tel Aviv Sourasky Medical Center, Tel-Aviv, Israel
- Sackler Faculty of Medicine, Tel Aviv University, Tel-Aviv, Israel
| | - Michal Dekel
- Sackler Faculty of Medicine, Tel Aviv University, Tel-Aviv, Israel
- Infectious Disease Unit, Tel Aviv Sourasky Medical Center, Tel-Aviv, Israel
| | - Yaniv Warschawski
- Division of Orthopedics, Tel Aviv Sourasky Medical Center, Tel-Aviv, Israel
- Sackler Faculty of Medicine, Tel Aviv University, Tel-Aviv, Israel
| |
Collapse
|
10
|
Hathcock T, Raiford D, Conley A, Barua S, Murillo DFB, Prarat M, Kaur P, Scaria J, Wang C. Antimicrobial-Resistant Escherichia coli, Enterobacter cloacae, Enterococcus faecium, and Salmonella Kentucky Harboring Aminoglycoside and Beta-Lactam Resistance Genes in Raw Meat-Based Dog Diets, USA. Foodborne Pathog Dis 2023; 20:477-483. [PMID: 37615516 DOI: 10.1089/fpd.2023.0043] [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] [Indexed: 08/25/2023] Open
Abstract
The practice of feeding raw meat-based diets to dogs has grown in popularity worldwide in recent years. However, there are public health risks in handling and feeding raw meat-based dog diets (RMDDs) to dogs since there are no pathogen reduction steps to reduce the microbial load, which may include antimicrobial-resistant pathogenic bacteria. A total of 100 RMDDs from 63 suppliers were sampled, and selective media were used to isolate bacteria from the diets. Bacterial identification, antimicrobial susceptibility testing, and whole-genome sequencing (WGS) were conducted to identify antimicrobial resistance (AMR). The primary meat sources for RMDDs included in this study were poultry (37%) and beef (24%). Frozen-dry was the main method of product production (68%). In total, 52 true and opportunistic pathogens, including Enterobacterales (mainly Escherichia coli, Enterobacter cloacae) and Enterococcus faecium, were obtained from 30 RMDDs. Resistance was identified to 19 of 28 antimicrobials tested, including amoxicillin/clavulanic acid (23/52, 44%), ampicillin (19/52, 37%), cephalexin (16/52, 31%), tetracycline (7/52, 13%), marbofloxacin (7/52, 13%), and cefazolin (6/52, 12%). All 19 bacterial isolates submitted for WGS harbored at least one type of AMR gene. The identified AMR genes were found to mediate resistance to aminoglycoside (gentamicin, streptomycin, amikacin/kanamycin, gentamicin/kanamycin/tobramycin), macrolide, beta-lactam (carbapenem, cephalosporin), tetracycline, fosfomycin, quinolone, phenicol/quinolone, and sulfonamide. In conclusion, the results of this study suggest that feeding and handling RMDDs may pose a significant public health risk due to the presence of antimicrobial-resistant pathogens, and further research and intervention may be necessary to minimize these risks.
Collapse
Affiliation(s)
- Terri Hathcock
- Department of Pathobiology, College of Veterinary Medicine, Auburn University, Auburn, Alabama, USA
| | - Donna Raiford
- Department of Pathobiology, College of Veterinary Medicine, Auburn University, Auburn, Alabama, USA
| | - Austin Conley
- Department of Pathobiology, College of Veterinary Medicine, Auburn University, Auburn, Alabama, USA
| | - Subarna Barua
- Department of Pathobiology, College of Veterinary Medicine, Auburn University, Auburn, Alabama, USA
| | | | - Melanie Prarat
- Ohio Department of Agriculture, Virology, and Molecular Diagnostics, Reynoldsburg, Ohio, USA
| | - Prabhjot Kaur
- Department of Veterinary & Biomedical Sciences, South Dakota State University, Brookings, South Dakota, USA
| | - Joy Scaria
- Department of Veterinary & Biomedical Sciences, South Dakota State University, Brookings, South Dakota, USA
| | - Chengming Wang
- Department of Pathobiology, College of Veterinary Medicine, Auburn University, Auburn, Alabama, USA
| |
Collapse
|
11
|
Long F, Li T, Meng L, Yu J, Meng A, Zhang Y. A neonatal case of concurrent Enterobacter cloacae bacteremia and green neutrophil inclusions on peripheral blood smear. Pediatr Blood Cancer 2023; 70:e30587. [PMID: 37459152 DOI: 10.1002/pbc.30587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/02/2023] [Revised: 07/06/2023] [Accepted: 07/09/2023] [Indexed: 09/26/2023]
Affiliation(s)
- Fang Long
- Department of Clinical Laboratory, Sichuan Provincial Maternity and Child Health Care Hospital, The Affiliated Women's and Children's Hospital of Chengdu Medical College, Chengdu, Sichuan Province, China
| | - Ting Li
- Department of Laboratory Medicine, Beijing Ludaopei Hospital, Beijing, China
| | - Lingsheng Meng
- Department of Clinical Laboratory, The District People's Hospital of Zhangqiu, Jinan, Shandong Province, China
| | - Jiadong Yu
- Department of Radiology, The District People's Hospital of Zhangqiu, Jinan, Shandong Province, China
| | - Aichun Meng
- Department of Cardiology, The District People's Hospital of Zhangqiu, Jinan, Shandong Province, China
| | - Yun Zhang
- Department of Clinical Laboratory, The District People's Hospital of Zhangqiu, Jinan, Shandong Province, China
| |
Collapse
|
12
|
Frutos-Grilo E, Kreling V, Hensel A, Campoy S. Host-pathogen interaction: Enterobacter cloacae exerts different adhesion and invasion capacities against different host cell types. PLoS One 2023; 18:e0289334. [PMID: 37874837 PMCID: PMC10597508 DOI: 10.1371/journal.pone.0289334] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Accepted: 07/17/2023] [Indexed: 10/26/2023] Open
Abstract
New antibiotics are urgently needed due to the huge increase of multidrug-resistant bacteria. The underexplored gram-negative bacterium Enterobacter cloacae is known to cause severe urinary tract and lung infections (UTIs). The pathogenicity of E. cloacae in UTI has only been studied at the bioinformatic level, but until now not within systematic in vitro investigations. The present study assesses different human cell lines for monitoring the early steps of host-pathogen interaction regarding bacterial adhesion to and invasion into different host cells by flow cytometric adhesion assay, classical cell counting assay, gentamicin invasion assay, and confocal laser scanning microscopy. To our knowledge, this is the first report in which E. cloacae has been investigated for its interaction with human bladder, kidney, skin, and lung cell lines under in vitro conditions. Data indicate that E. cloacae exerts strong adhesion to urinary tract (bladder and kidney) and lung cells, a finding which correlates with the clinical relevance of the bacterium for induction of urinary tract and lung infections. Furthermore, E. cloacae ATCC 13047 barely adheres to skin cells (A-431) and shows no relevant interaction with intestinal cells (Caco-2, HT-29), even in the presence of mucin (HT29 MTX). In contrast, invasion assays and confocal laser scanning microscopy demonstrate that E. cloacae internalizes in all tested host cells, but to a different extent. Especially, bladder and kidney cells are being invaded to the highest extent. Defective mutants of fimH and fimA abolished the adhesion of E. cloacae to T24 cells, while csgA deletion had no influence on adhesion. These results indicate that E. cloacae has different pattern for adhesion and invasion depending on the target tissue, which again correlates with the clinical relevance of the pathogen. For detailed investigation of the early host-pathogen interaction T24 bladder cells comprise a suitable assay system for evaluation the bacterial adhesion and invasion.
Collapse
Affiliation(s)
- Elisabet Frutos-Grilo
- Departament de Genètica i de Microbiologia, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - Vanessa Kreling
- Institute of Pharmaceutical Biology and Phytochemistry, University of Münster, Münster, Germany
| | - Andreas Hensel
- Institute of Pharmaceutical Biology and Phytochemistry, University of Münster, Münster, Germany
| | - Susana Campoy
- Departament de Genètica i de Microbiologia, Universitat Autònoma de Barcelona, Bellaterra, Spain
| |
Collapse
|
13
|
Laupland KB, Edwards F, Harris PNA, Paterson DL. Significant clinical differences but not outcomes between Klebsiella aerogenes and Enterobacter cloacae bloodstream infections: a comparative cohort study. Infection 2023; 51:1445-1451. [PMID: 36881325 PMCID: PMC10545569 DOI: 10.1007/s15010-023-02010-1] [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: 11/07/2022] [Accepted: 02/21/2023] [Indexed: 03/08/2023]
Abstract
PURPOSE Although Klebsiella aerogenes (formerly Enterobacter aerogenes) and Enterobacter cloacae share many phenotypic characteristics, controversy exists as to whether they cause clinically distinguishable infections. The objective of this study was to determine the comparative incidence, determinants, and outcomes of K. aerogenes and E. cloacae bloodstream infections (BSI). METHODS Population-based surveillance was conducted among residents aged ≥ 15 years of Queensland, Australia during 2000-2019. RESULTS Overall 695 and 2879 incident K. aerogenes and E. cloacae BSIs were identified for incidence rates of 1.1 and 4.4 per 100,000 population, respectively. There was a marked increase in incidence associated with older age and with males with both species. Patients with K. aerogenes BSIs were older, were more likely male, to have community-associated disease, and to have a genitourinary source of infection. In contrast, E. cloacae were more likely to have co-morbid diagnoses of liver disease and malignancy and be associated with antimicrobial resistance. Enterobacter cloacae were significantly more likely to have repeat episodes of BSI as compared to K. aerogenes. However, no differences in length of stay or all cause 30-day case-fatality were observed. CONCLUSION Although significant demographic and clinical differences exist between K. aerogenes and E. cloacae BSI, they share similar outcomes.
Collapse
Affiliation(s)
- Kevin B Laupland
- Department of Intensive Care Services, Royal Brisbane and Women's Hospital, Level 3 Ned Hanlon Building, Butterfield Street, Brisbane, QLD, 4029, Australia.
- Queensland University of Technology (QUT), Brisbane, QLD, Australia.
| | - Felicity Edwards
- Queensland University of Technology (QUT), Brisbane, QLD, Australia
| | - Patrick N A Harris
- Faculty of Medicine, University of Queensland, UQ Center for Clinical Research, Brisbane, Australia
- Department of Microbiology, Pathology Queensland, Brisbane, Australia
| | - David L Paterson
- Faculty of Medicine, University of Queensland, UQ Center for Clinical Research, Brisbane, Australia
- Infectious Diseases Unit, Royal Brisbane and Women's Hospital, Brisbane, Australia
| |
Collapse
|
14
|
Pallitto CR, Feuerstein JL, Baer AZ, Bishara JD, Bhavsar SM. Enterobacter cloacae Complex Meningitis in a Full-term Neonate. Clin Pediatr (Phila) 2023; 62:1150-1154. [PMID: 36908064 DOI: 10.1177/00099228231155391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/14/2023]
Affiliation(s)
- Candace R Pallitto
- Department of Pediatrics, Joseph M. Sanzari Children's Hospital, Hackensack University Medical Center, Hackensack, NJ, USA
| | - Jessica L Feuerstein
- Department of Pediatrics, Joseph M. Sanzari Children's Hospital, Hackensack University Medical Center, Hackensack, NJ, USA
| | - Aryeh Z Baer
- Division of Pediatric Infectious Disease, Department of Pediatrics, Joseph M. Sanzari Children's Hospital, Hackensack University Medical Center, Hackensack, NJ, USA
| | - Joanne D Bishara
- Division of Neonatology, Department of Pediatrics, Joseph M. Sanzari Children's Hospital, Hackensack University Medical Center, Hackensack, NJ, USA
| | - Sejal M Bhavsar
- Division of Pediatric Infectious Disease, Department of Pediatrics, Joseph M. Sanzari Children's Hospital, Hackensack University Medical Center, Hackensack, NJ, USA
| |
Collapse
|
15
|
Othman AS, Ahmed NA, Elneklawi MS, Hassan MM, El-Mongy MA. Generation of green electricity from sludge using photo-stimulated bacterial consortium as a sustainable technology. Microb Cell Fact 2023; 22:183. [PMID: 37715250 PMCID: PMC10503168 DOI: 10.1186/s12934-023-02187-y] [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: 05/14/2023] [Accepted: 08/22/2023] [Indexed: 09/17/2023] Open
Abstract
Microbial fuel cell (MFC) is a bio-electrical energy generator that uses respiring microbes to transform organic matter present in sludge into electrical energy. The primary goal of this work was to introduce a new approach to the green electricity generation technology. In this context a total of 6 bacterial isolates were recovered from sludge samples collected from El-Sheikh Zayed water purification plant, Egypt, and screened for their electrogenic potential. The most promising isolates were identified according to 16S rRNA sequencing as Escherichia coli and Enterobacter cloacae, promising results were achieved on using them in consortium at optimized values of pH (7.5), temperature (30°C) and substrate (glucose/pyruvate 1%). Low level red laser (λ = 632.8nm, 8mW) was utilized to promote the electrogenic efficiency of the bacterial consortium, maximum growth was attained at 210 sec exposure interval. In an application of adding standard inoculum (107 cfu/mL) of the photo-stimulated bacterial consortium to sludge based MFC a significant increase in the output potential difference values were recorded, the electricity generation was maintained by regular supply of external substrate. These results demonstrate the future development of the dual role of MFCs in renewable energy production and sludge recycling.
Collapse
Affiliation(s)
- Amal S Othman
- Faculty of Applied Health Sciences Technology, October 6 University, P.O. Box 12585, El- Giza, Egypt
| | - Nashwa A Ahmed
- Faculty of Applied Health Sciences Technology, October 6 University, P.O. Box 12585, El- Giza, Egypt.
| | - Mona S Elneklawi
- Faculty of Applied Health Sciences Technology, October 6 University, P.O. Box 12585, El- Giza, Egypt
| | - Mansour M Hassan
- Microbial Biotechnology Department, Genetic Engineering and Biotechnology Institute, Sadat City University, Sadat city, Egypt
| | - Mahmoud Abd El-Mongy
- Microbial Biotechnology Department, Genetic Engineering and Biotechnology Institute, Sadat City University, Sadat city, Egypt
| |
Collapse
|
16
|
Harikrishnan S, Sudarshan S, Sivasubramani K, Nandini MS, Narenkumar J, Ramachandran V, Almutairi BO, Arunkumar P, Rajasekar A, Jayalakshmi S. Larvicidal and anti-termite activities of microbial biosurfactant produced by Enterobacter cloacae SJ2 isolated from marine sponge Clathria sp. Sci Rep 2023; 13:15153. [PMID: 37704703 PMCID: PMC10499797 DOI: 10.1038/s41598-023-42475-6] [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: 04/10/2023] [Accepted: 09/11/2023] [Indexed: 09/15/2023] Open
Abstract
The widespread use of synthetic pesticides has resulted in a number of issues, including a rise in insecticide-resistant organisms, environmental degradation, and a hazard to human health. As a result, new microbial derived insecticides that are safe for human health and the environment are urgently needed. In this study, rhamnolipid biosurfactants produced from Enterobacter cloacae SJ2 was used to evaluate the toxicity towards mosquito larvae (Culex quinquefasciatus) and termites (Odontotermes obesus). Results showed dose dependent mortality rate was observed between the treatments. The 48 h LC50 (median lethal concentration) values of the biosurfactant were determined for termite and mosquito larvae following the non-linear regression curve fit method. Results showed larvicidal activity and anti-termite activity of biosurfactants with 48 h LC50 value (95% confidence interval) of 26.49 mg/L (25.40 to 27.57) and 33.43 mg/L (31.09 to 35.68), respectively. According to a histopathological investigation, the biosurfactant treatment caused substantial tissue damage in cellular organelles of larvae and termites. The findings of this study suggest that the microbial biosurfactant produced by E. cloacae SJ2 is an excellent and potentially effective agent for controlling Cx. quinquefasciatus and O. obesus.
Collapse
Affiliation(s)
- Sekar Harikrishnan
- Centre of Advanced Study in Marine Biology, Faculty of Marine Sciences, Annamalai University, Parangipettai, Tamil Nadu, 608502, India.
| | - Shanmugam Sudarshan
- Department of Aquatic Environment Management, TNJFU- Dr. M.G.R Fisheries College and Research Institute, Thalainayeru, Tamil Nadu, 614712, India
| | - Kandasamy Sivasubramani
- Department of Microbiology, Faculty of Science, Annamalai University, Annamalai Nagar, Chidambaram, Tamil Nadu, India
| | - M S Nandini
- Department of Microbiology, Sree Balaji Medical College and Hospital, Chennai, Tamil Nadu, India
| | - Jayaraman Narenkumar
- Department of Environmental & Water Resources Engineering, School of Civil Engineering (SCE), Vellore Institute of Technology, Vellore, Tamil Nadu, 632014, India.
| | - Vasudevan Ramachandran
- Department of Medical Sciences, University College of MAIWP International, Taman Batu Muda, 68100, Batu Caves, Kuala Lumpur, Malaysia
- Department of Conservative Dentistry and Endodontics, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, India
| | - Bader O Almutairi
- Department of Zoology, College of Science, King Saud University, 11451, Riyadh, Saudi Arabia
| | - Paulraj Arunkumar
- School of Chemical Engineering, Chonnam National University, Gwangju, South Korea
| | - Aruliah Rajasekar
- Environmental Molecular Microbiology Research Laboratory, Department of Biotechnology, Thiruvalluvar University, Serkkadu, Vellore, Tamil Nadu, 632115, India
| | - Singaram Jayalakshmi
- Centre of Advanced Study in Marine Biology, Faculty of Marine Sciences, Annamalai University, Parangipettai, Tamil Nadu, 608502, India
| |
Collapse
|
17
|
Huang Z, Liu S, Wang Y, Yao Z, Feng L, Lin Y, Ye J, Zhou T, Wang Z. Comparison of prevalence, resistance, biofilm-forming ability and virulence between carbapenem-non-susceptible and carbepenem-susceptible Enterobacter cloacae complex in clusters. J Hosp Infect 2023; 139:168-174. [PMID: 37348563 DOI: 10.1016/j.jhin.2023.06.017] [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: 03/01/2023] [Revised: 05/30/2023] [Accepted: 06/07/2023] [Indexed: 06/24/2023]
Abstract
OBJECTIVES This study aimed to explore differences in prevalence, resistance, biofilm-forming ability and virulence between carbapenem-non-susceptible and carbapenem-susceptible Enterobacter cloacae complex (ECC) in different clusters. METHODS Ninety-one carbapenem-non-susceptible isolates and an equal number of carbapenem-susceptible isolates and their clinical information were collected from a university teaching hospital in China. The strains were divided into different clusters based on hsp60 analysis. The agar dilution method was used to determine the minimum inhibitory concentrations of common antibiotics. The crystal violet assay was used to measure biofilm-forming ability. The Galleria mellonella infection model and polymerase chain reaction of virulence genes were used to evaluate virulence. RESULTS The isolates were divided into 12 clusters based on hsp60 analysis. Cluster VIII accounted for a greater proportion of carbapenem-non-susceptible isolates than the other clusters. The same clusters exhibited different resistance rates in carbapenem-non-susceptible and carbapenem-susceptible isolates. Moreover, carbapenem-non-susceptible isolates carried fewer virulence genes than carbapenem-susceptible isolates, and carbapenem-non-susceptible isolates in cluster II in did not carry the detected virulence genes. Virulence of carbapenem-non-susceptible and carbapenem-susceptible isolates differed significantly in clusters I, III, VIII and IX, as evaluated using the G. mellonella infection model. Carbapenem-non-susceptible isolates in cluster VIII showed higher prevalence, resistance, biofilm-forming ability and pathogenicity compared with the other clusters. CONCLUSIONS The study findings indicate the need to identify subgroups of ECC, and provide better advice and guidance for the use of carbapenems.
Collapse
Affiliation(s)
- Z Huang
- Department of Clinical Laboratory, First Affiliated Hospital of Wenzhou Medical University, Key Laboratory of Clinical Laboratory Diagnosis and Translational Research of Zhejiang Province, Wenzhou, Zhejiang Province, China
| | - S Liu
- Department of Clinical Laboratory, Children's Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, China
| | - Y Wang
- Department of Clinical Laboratory, First Affiliated Hospital of Wenzhou Medical University, Key Laboratory of Clinical Laboratory Diagnosis and Translational Research of Zhejiang Province, Wenzhou, Zhejiang Province, China
| | - Z Yao
- School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou, Zhejiang Province, China
| | - L Feng
- School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou, Zhejiang Province, China
| | - Y Lin
- School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou, Zhejiang Province, China
| | - J Ye
- Department of Clinical Laboratory, First Affiliated Hospital of Wenzhou Medical University, Key Laboratory of Clinical Laboratory Diagnosis and Translational Research of Zhejiang Province, Wenzhou, Zhejiang Province, China
| | - T Zhou
- Department of Clinical Laboratory, First Affiliated Hospital of Wenzhou Medical University, Key Laboratory of Clinical Laboratory Diagnosis and Translational Research of Zhejiang Province, Wenzhou, Zhejiang Province, China.
| | - Z Wang
- Department of Clinical Laboratory, First Affiliated Hospital of Wenzhou Medical University, Key Laboratory of Clinical Laboratory Diagnosis and Translational Research of Zhejiang Province, Wenzhou, Zhejiang Province, China.
| |
Collapse
|
18
|
Pavlov M, Bodrožić Džakić Poljak T, Pavlović N, Šestan Crnek S, Barić D, Rudež I. Enterobacter cloacae septicemia in a triple-cannula extracorporeal membrane oxygenation circulatory support treated with Seraph-100 Microbind affinity blood filter. Croat Med J 2023; 64:284-288. [PMID: 37654040 PMCID: PMC10509680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Accepted: 07/24/2023] [Indexed: 09/02/2023] Open
Abstract
Bloodstream infections (BSI) are frequently encountered during extracorporeal membrane oxygenation (ECMO) support. Once septicemia is observed, treatment should be rapid, adequate, and multifaceted, particularly in advanced ECMO configurations. We report on a case of a 60-year-old male patient with acute-on-chronic heart failure due to ischemic cardiomyopathy. The treatment was complicated by cardiogenic shock requiring veno-arterial ECMO support, and, due to persistent pulmonary congestion, an upgrade with an additional left-atrial drainage cannula. After seven days of ECMO support, septicemia with shock ensued. Ex iuvantibus antibiotic treatment was started promptly. We wanted to minimize the likelihood of bacterial biofilm build-up requiring an exchange of the ECMO circuit and cannula, which was expected to be challenging. Therefore, we added a Seraph-100 Microbind affinity blood filter (providing blood purification with the potential for rapid bacterial clearance) to the ECMO circuit. Initial blood cultures tested positive for Enterobacter cloacae. Following a course of Seraph-100 treatment, bacteremia, septicemia, and shock resolved. There was no need for a circuit or cannula exchange. The additional eleven days of ECMO support were uneventful. The patient was successfully bridged to long-term mechanical circulatory support. We believe that the synergistic effect of early implementation of both broad-spectrum antibiotic treatment and blood purification with the potential for rapid bacterial clearance (such as the one provided with the Seraph-100 Microbind affinity blood filter) is crucial in BSI in patients receiving advanced ECMO.
Collapse
Affiliation(s)
- Marin Pavlov
- Marin Pavlov, Department of Cardiology, Dubrava University Hospital, Avenija Gojka Šuška 6, 10000 Zagreb, Croatia,
| | | | | | | | | | | |
Collapse
|
19
|
Bennett W, Mende K, Campbell WR, Beckius M, Stewart L, Shaikh F, Rahman A, Tribble DR, Yabes JM. Enterobacter cloacae infection characteristics and outcomes in battlefield trauma patients. PLoS One 2023; 18:e0290735. [PMID: 37643169 PMCID: PMC10464967 DOI: 10.1371/journal.pone.0290735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Accepted: 08/14/2023] [Indexed: 08/31/2023] Open
Abstract
Enterobacter cloacae is a Gram-negative rod with multidrug-resistant potential due to chromosomally-induced AmpC β-lactamase. We evaluated characteristics, antibiotic utilization, and outcomes associated with battlefield-related E. cloacae infections (2009-2014). Single initial and serial E. cloacae isolates (≥24 hours from initial isolate from any site) associated with a clinical infection were examined. Susceptibility profiles of initial isolates in the serial isolation group were contrasted against last isolate recovered. Characteristics of 112 patients with E. cloacae infections (63 [56%] with single initial isolation; 49 [44%] with serial isolation) were compared to 509 patients with bacterial infections not attributed to E. cloacae. E. cloacae patients sustained more blast trauma (78%) compared to non-E. cloacae infections patients (75%; p<0.001); however, injury severity scores were comparable (median of 34.5 and 33, respectively; p = 0.334). Patients with E. cloacae infections had greater shock indices (median 1.07 vs 0.92; p = 0.005) and required more initial blood products (15 vs. 14 units; p = 0.032) compared to patients with non-E. cloacae infections. Although E. cloacae patients had less intensive care unit admissions (80% vs. 90% with non-E. cloacae infection patients; p = 0.007), they did have more operating room visits (5 vs. 4; p = 0.001), longer duration of antibiotic therapy (43.5 vs. 34 days; p<0.001), and lengthier hospitalizations (57 vs. 44 days; p<0.001). Patients with serial E. cloacae had isolation of infecting isolates sooner than patients with single initial E. cloacae (median of 5 vs. 8 days post-injury; p = 0.046); however, outcomes were not significantly different between the groups. Statistically significant resistance to individual antibiotics did not develop between initial and last isolates in the serial isolation group. Despite current combat care and surgical prophylaxis guidelines recommending upfront provision of AmpC-inducing antibiotics, clinical outcomes did not differ nor did significant antibiotic resistance develop in patients who experienced serial isolation of E. cloacae versus single initial isolation.
Collapse
Affiliation(s)
- William Bennett
- Brooke Army Medical Center, JBSA Fort Sam Houston, Texas, United States of America
- Uniformed Services University of the Health Sciences, Bethesda, MD, United States of America
| | - Katrin Mende
- Brooke Army Medical Center, JBSA Fort Sam Houston, Texas, United States of America
- Infectious Disease Clinical Research Program, Department of Preventive Medicine and Biostatistics, Uniformed Services University of the Health Sciences, Bethesda, Maryland, United States of America
- Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc., Bethesda, Maryland, United States of America
| | - Wesley R. Campbell
- Walter Reed National Military Medical Center, Bethesda, Maryland, United States of America
| | - Miriam Beckius
- Brooke Army Medical Center, JBSA Fort Sam Houston, Texas, United States of America
| | - Laveta Stewart
- Infectious Disease Clinical Research Program, Department of Preventive Medicine and Biostatistics, Uniformed Services University of the Health Sciences, Bethesda, Maryland, United States of America
- Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc., Bethesda, Maryland, United States of America
| | - Faraz Shaikh
- Infectious Disease Clinical Research Program, Department of Preventive Medicine and Biostatistics, Uniformed Services University of the Health Sciences, Bethesda, Maryland, United States of America
- Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc., Bethesda, Maryland, United States of America
| | - Azizur Rahman
- Infectious Disease Clinical Research Program, Department of Preventive Medicine and Biostatistics, Uniformed Services University of the Health Sciences, Bethesda, Maryland, United States of America
- Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc., Bethesda, Maryland, United States of America
| | - David R. Tribble
- Infectious Disease Clinical Research Program, Department of Preventive Medicine and Biostatistics, Uniformed Services University of the Health Sciences, Bethesda, Maryland, United States of America
| | - Joseph M. Yabes
- Brooke Army Medical Center, JBSA Fort Sam Houston, Texas, United States of America
- Uniformed Services University of the Health Sciences, Bethesda, MD, United States of America
| |
Collapse
|
20
|
Khine S, Rabah L, Palanisamy N, Liroff K, Bachuwa G. Enterobacter cloacae as sole organism responsible for vertebral osteomyelitis/discitis and vertebral collapse in a patient with intravenous drug abuse. BMJ Case Rep 2023; 16:e254988. [PMID: 37553172 PMCID: PMC10414099 DOI: 10.1136/bcr-2023-254988] [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] [Indexed: 08/10/2023] Open
Abstract
Staphylococcus aureus is the most commonly isolated organism in osteomyelitis, while gram-negative bacteria (GNB) comprises only a minor portion. GNB osteomyelitis is usually seen in patients with bacteraemia, recent genitourinary infection, open fractures or trauma and is rarely seen in the spines. Our case is a man in his 30s with no significant risk factors except an extended history of intravenous drug use (IVDU), who presented with back pain and subsequently developed vertebral collapse. Bone culture grew Enterobacter cloacae, yet blood cultures were negative. To date, there are limited data on the prevalence of GNB osteomyelitis in IVDU and its association. Due to rising rates of IVDU, further research must be done into associated medical complications to provide comprehensive care. Moreover, the emergence of multidrug-resistant GNB strains limits the number of effective antibiotics and is expected to pose more serious public concerns in the future.
Collapse
Affiliation(s)
- Su Khine
- Internal Medicine, Hurley Medical Center, Flint, Michigan, USA
| | - Lara Rabah
- Internal Medicine, Hurley Medical Center, Flint, Michigan, USA
| | | | - Kaitlin Liroff
- Infectious Disease Department, Hurley Medical Center, Flint, Michigan, USA
| | - Ghassan Bachuwa
- Internal Medicine, Hurley Medical Center, Flint, Michigan, USA
| |
Collapse
|
21
|
Fukuzawa S, Sato T, Aoki K, Yamamoto S, Ogasawara N, Nakajima C, Suzuki Y, Horiuchi M, Takahashi S, Yokota SI. High prevalence of colistin heteroresistance in specific species and lineages of Enterobacter cloacae complex derived from human clinical specimens. Ann Clin Microbiol Antimicrob 2023; 22:60. [PMID: 37454128 DOI: 10.1186/s12941-023-00610-1] [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: 04/14/2023] [Accepted: 07/05/2023] [Indexed: 07/18/2023] Open
Abstract
BACKGROUND Colistin (CST) is a last-line drug for multidrug-resistant Gram-negative bacterial infections. CST-heteroresistant Enterobacter cloacae complex (ECC) has been isolated. However, integrated analysis of epidemiology and resistance mechanisms based on the complete ECC species identification has not been performed. METHODS Clinical isolates identified as "E. cloacae complex" by MALDI-TOF MS Biotyper Compass in a university hospital in Japan were analyzed. Minimum inhibitory concentrations of CST were determined by the broth microdilution method. The population analysis profiling (PAP) was performed for detecting the heteroresistant phenotype. The heat shock protein 60 (hsp60) cluster was determined from its partial nucleotide sequence. From the data of whole-genome sequencing, average nucleotide identity (ANI) for determining ECC species, multilocus sequence type, core genome single-nucleotide-polymorphism-based phylogenetic analysis were performed. phoPQ-, eptA-, and arnT-deleted mutants were established to evaluate the mechanism underlying colistin heteroresistance. The arnT mRNA expression levels were determined by reverse transcription quantitative PCR. RESULTS Thirty-eight CST-resistant isolates, all of which exhibited the heteroresistant phenotype by PAP, were found from 138 ECC clinical isolates (27.5%). The prevalence of CST-resistant isolates did not significantly differ among the origin of specimens (29.0%, 27.8%, and 20.2% for respiratory, urine, and blood specimens, respectively). hsp60 clusters, core genome phylogeny, and ANI revealed that the CST-heteroresistant isolates were found in all or most of Enterobacter roggenkampii (hsp60 cluster IV), Enterobacter kobei (cluster II), Enterobacter chuandaensis (clusters III and IX), and Enterobacter cloacae subspecies (clusters XI and XII). No heteroresistant isolates were found in Enterobacter hormaechei subspecies (clusters VIII, VI, and III) and Enterobacter ludwigii (cluster V). CST-induced mRNA upregulation of arnT, which encodes 4-amino-4-deoxy-L-arabinose transferase, was observed in the CST-heteroresistant isolates, and it is mediated by phoPQ pathway. Isolates possessing mcr-9 and mcr-10 (3.6% and 5.6% of total ECC isolates, respectively) exhibited similar CST susceptibility and PAP compared with mcr-negative isolates. CONCLUSIONS Significant prevalence (approximately 28%) of CST heteroresistance is observed in ECC clinical isolates, and they are accumulated in specific species and lineages. Heteroresistance is occurred by upregulation of arnT mRNA induced by CST. Acquisition of mcr genes contributes less to CST resistance in ECC.
Collapse
Affiliation(s)
- Shota Fukuzawa
- Department of Microbiology, Sapporo Medical University School of Medicine, Sapporo, Japan
- Clinical Laboratory, National Hospital Organization Hokkaido Cancer Center, Sapporo, Japan
| | - Toyotaka Sato
- Department of Microbiology, Sapporo Medical University School of Medicine, Sapporo, Japan.
- 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.
| | - Kotaro Aoki
- Department of Microbiology and Infectious Diseases, Toho University School of Medicine, Tokyo, 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
| | - Chie Nakajima
- Division of Bioresources, Hokkaido University International Institute for Zoonosis Control, Sapporo, Japan
- International Collaboration Unit, Hokkaido University, International Institute for Zoonosis Control, Sapporo, Japan
- Institute for Vaccine Research and Development (HU-IVReD), Hokkaido University, Sapporo, Japan
| | - Yasuhiko Suzuki
- Division of Bioresources, Hokkaido University International Institute for Zoonosis Control, Sapporo, Japan
- International Collaboration Unit, Hokkaido University, International Institute for Zoonosis Control, Sapporo, Japan
- Institute for Vaccine Research and Development (HU-IVReD), Hokkaido University, Sapporo, Japan
| | - Motohiro Horiuchi
- 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
| | - Satoshi Takahashi
- Department of Infection Control and Laboratory Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan
- Division of Laboratory Medicine, Sapporo Medical University Hospital, Sapporo, Japan
| | - Shin-Ichi Yokota
- Department of Microbiology, Sapporo Medical University School of Medicine, Sapporo, Japan
| |
Collapse
|
22
|
Lasarte-Monterrubio C, Guijarro-Sánchez P, Vázquez-Ucha JC, Alonso-Garcia I, Alvarez-Fraga L, Outeda M, Martinez-Guitian M, Peña-Escolano A, Maceiras R, Lence E, González-Bello C, Arca-Suárez J, Bou G, Beceiro A. Antimicrobial Activity of Cefiderocol against the Carbapenemase-Producing Enterobacter cloacae Complex and Characterization of Reduced Susceptibility Associated with Metallo-β-Lactamase VIM-1. Antimicrob Agents Chemother 2023; 67:e0150522. [PMID: 37195077 PMCID: PMC10190674 DOI: 10.1128/aac.01505-22] [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: 11/11/2022] [Accepted: 03/16/2023] [Indexed: 05/18/2023] Open
Abstract
Emergence of cefiderocol resistance among carbapenemase-producing Enterobacterales, particularly those in the Enterobacter cloacae complex (ECC), is becoming of alarming concern; however, the mechanistic basis of this phenomenon remains poorly understood. We describe the acquisition of VIM-1-mediated reduced cefiderocol susceptibility (MICs 0.5 to 4 mg/L) in a collection of 54 carbapenemase-producing isolates belonging to the ECC. MICs were determined by reference methodologies. Antimicrobial resistance genomic analysis was performed through hybrid WGS. The impact of VIM-1 production on cefiderocol resistance in the ECC background was examined at microbiological, molecular, biochemical, and atomic levels. Antimicrobial susceptibility testing yielded 83.3% susceptible isolates and MIC50/90 values of 1/4 mg/L. Decreased susceptibility to cefiderocol was mainly associated with isolates producing VIM-1, with cefiderocol MICs 2- to 4-fold higher than for isolates carrying other types of carbapenemases. E. cloacae and Escherichia coli VIM-1 transformants displayed significantly enhanced cefiderocol MICs. Biochemical assays with purified VIM-1 protein revealed low but detectable cefiderocol hydrolysis. Simulation studies revealed how cefiderocol is anchored to the VIM-1 active site. Additional molecular assays and WGS data analysis highlighted the implication of SHV-12 coproduction and suggested the inactivation of the FcuA-like siderophore receptor as further contributors to the higher cefiderocol MICs. Our findings warn of the potential of the VIM-1 carbapenemase to at least partly limit the activity of cefiderocol in the ECC. This effect is probably enhanced due to combination with additional mechanisms, such as ESBL production and siderophore inactivation, and indicates the need for active surveillance to extend the life span of this promising cephalosporin.
Collapse
Affiliation(s)
- Cristina Lasarte-Monterrubio
- Microbiology Department, A Coruña University Hospital Complex (CHUAC), A Coruña Institute for Biomedical Research (INIBIC), CIBER de Enfermedades Infecciosas (CIBERINFEC), A Coruña, Spain
| | - Paula Guijarro-Sánchez
- Microbiology Department, A Coruña University Hospital Complex (CHUAC), A Coruña Institute for Biomedical Research (INIBIC), CIBER de Enfermedades Infecciosas (CIBERINFEC), A Coruña, Spain
| | - Juan Carlos Vázquez-Ucha
- Microbiology Department, A Coruña University Hospital Complex (CHUAC), A Coruña Institute for Biomedical Research (INIBIC), CIBER de Enfermedades Infecciosas (CIBERINFEC), A Coruña, Spain
| | - Isaac Alonso-Garcia
- Microbiology Department, A Coruña University Hospital Complex (CHUAC), A Coruña Institute for Biomedical Research (INIBIC), CIBER de Enfermedades Infecciosas (CIBERINFEC), A Coruña, Spain
| | - Laura Alvarez-Fraga
- Microbiology Department, A Coruña University Hospital Complex (CHUAC), A Coruña Institute for Biomedical Research (INIBIC), CIBER de Enfermedades Infecciosas (CIBERINFEC), A Coruña, Spain
| | - Michelle Outeda
- Microbiology Department, A Coruña University Hospital Complex (CHUAC), A Coruña Institute for Biomedical Research (INIBIC), CIBER de Enfermedades Infecciosas (CIBERINFEC), A Coruña, Spain
| | - Marta Martinez-Guitian
- Microbiology Department, A Coruña University Hospital Complex (CHUAC), A Coruña Institute for Biomedical Research (INIBIC), CIBER de Enfermedades Infecciosas (CIBERINFEC), A Coruña, Spain
- NANOBIOFAR, Centre for Research in Molecular Medicine and Chronic Diseases (CiMUS), Universidad de Santiago de Compostela, Santiago de Compostela, Spain
| | - Andrea Peña-Escolano
- Microbiology Department, A Coruña University Hospital Complex (CHUAC), A Coruña Institute for Biomedical Research (INIBIC), CIBER de Enfermedades Infecciosas (CIBERINFEC), A Coruña, Spain
| | - Romina Maceiras
- Microbiology Department, A Coruña University Hospital Complex (CHUAC), A Coruña Institute for Biomedical Research (INIBIC), CIBER de Enfermedades Infecciosas (CIBERINFEC), A Coruña, Spain
| | - Emilio Lence
- Centre for Research in Biological Chemistry and Molecular Materials (CiQUS), Department of Organic Chemistry, Universidade de Santiago de Compostela, Santiago de Compostela, Spain
| | - Concepción González-Bello
- Centre for Research in Biological Chemistry and Molecular Materials (CiQUS), Department of Organic Chemistry, Universidade de Santiago de Compostela, Santiago de Compostela, Spain
| | - Jorge Arca-Suárez
- Microbiology Department, A Coruña University Hospital Complex (CHUAC), A Coruña Institute for Biomedical Research (INIBIC), CIBER de Enfermedades Infecciosas (CIBERINFEC), A Coruña, Spain
| | - German Bou
- Microbiology Department, A Coruña University Hospital Complex (CHUAC), A Coruña Institute for Biomedical Research (INIBIC), CIBER de Enfermedades Infecciosas (CIBERINFEC), A Coruña, Spain
| | - Alejandro Beceiro
- Microbiology Department, A Coruña University Hospital Complex (CHUAC), A Coruña Institute for Biomedical Research (INIBIC), CIBER de Enfermedades Infecciosas (CIBERINFEC), A Coruña, Spain
| |
Collapse
|
23
|
Candela A, Guerrero-López A, Mateos M, Gómez-Asenjo A, Arroyo MJ, Hernandez-García M, del Campo R, Cercenado E, Cuénod A, Méndez G, Mancera L, Caballero JDD, Martínez-García L, Gijón D, Morosini MI, Ruiz-Garbajosa P, Egli A, Cantón R, Muñoz P, Rodríguez-Temporal D, Rodríguez-Sánchez B. Automatic Discrimination of Species within the Enterobacter cloacae Complex Using Matrix-Assisted Laser Desorption Ionization-Time of Flight Mass Spectrometry and Supervised Algorithms. J Clin Microbiol 2023; 61:e0104922. [PMID: 37014210 PMCID: PMC10117122 DOI: 10.1128/jcm.01049-22] [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: 07/20/2022] [Accepted: 02/28/2023] [Indexed: 04/05/2023] Open
Abstract
The Enterobacter cloacae complex (ECC) encompasses heterogeneous clusters of species that have been associated with nosocomial outbreaks. These species may have different acquired antimicrobial resistance and virulence mechanisms, and their identification is challenging. This study aims to develop predictive models based on matrix-assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF MS) profiles and machine learning for species-level identification. A total of 219 ECC and 118 Klebsiella aerogenes clinical isolates from three hospitals were included. The capability of the proposed method to differentiate the most common ECC species (Enterobacter asburiae, Enterobacter kobei, Enterobacter hormaechei, Enterobacter roggenkampii, Enterobacter ludwigii, and Enterobacter bugandensis) and K. aerogenes was demonstrated by applying unsupervised hierarchical clustering with principal-component analysis (PCA) preprocessing. We observed a distinctive clustering of E. hormaechei and K. aerogenes and a clear trend for the rest of the ECC species to be differentiated over the development data set. Thus, we developed supervised, nonlinear predictive models (support vector machine with radial basis function and random forest). The external validation of these models with protein spectra from two participating hospitals yielded 100% correct species-level assignment for E. asburiae, E. kobei, and E. roggenkampii and between 91.2% and 98.0% for the remaining ECC species; with data analyzed in the three participating centers, the accuracy was close to 100%. Similar results were obtained with the Mass Spectrometric Identification (MSI) database developed recently (https://msi.happy-dev.fr) except in the case of E. hormaechei, which was more accurately identified with the random forest algorithm. In short, MALDI-TOF MS combined with machine learning was demonstrated to be a rapid and accurate method for the differentiation of ECC species.
Collapse
Affiliation(s)
- Ana Candela
- Clinical Microbiology and Infectious Diseases Department, Hospital General Universitario Gregorio Marañón, Madrid, Spain
- Institute of Health Research Gregorio Marañón, Madrid, Spain
| | | | - Miriam Mateos
- Servicio de Microbiología, Hospital Universitario Ramón y Cajal, Madrid, Spain
- Instituto Ramón y Cajal de Investigación Sanitaria, Madrid, Spain
| | - Alicia Gómez-Asenjo
- Clinical Microbiology and Infectious Diseases Department, Hospital General Universitario Gregorio Marañón, Madrid, Spain
- Institute of Health Research Gregorio Marañón, Madrid, Spain
| | | | - Marta Hernandez-García
- Servicio de Microbiología, Hospital Universitario Ramón y Cajal, Madrid, Spain
- CIBER en Enfermedades Infecciosas, Madrid, Spain
- Instituto Ramón y Cajal de Investigación Sanitaria, Madrid, Spain
| | - Rosa del Campo
- Servicio de Microbiología, Hospital Universitario Ramón y Cajal, Madrid, Spain
- CIBER en Enfermedades Infecciosas, Madrid, Spain
- Instituto Ramón y Cajal de Investigación Sanitaria, Madrid, Spain
| | - Emilia Cercenado
- Clinical Microbiology and Infectious Diseases Department, Hospital General Universitario Gregorio Marañón, Madrid, Spain
- Institute of Health Research Gregorio Marañón, Madrid, Spain
- CIBER de Enfermedades Respiratorias, CIBERES CB06/06/0058, Madrid, Spain
- Medicine Department, Faculty of Medicine, Universidad Complutense de Madrid, Madrid, Spain
| | - Aline Cuénod
- Applied Microbiology Research, Department of Biomedicine, University of Basel, Basel, Switzerland
- Division of Clinical Bacteriology and Mycology, University Hospital Basel, Basel, Switzerland
| | - Gema Méndez
- Clover Bioanalytical Software, Granada, Spain
| | | | - Juan de Dios Caballero
- Servicio de Microbiología, Hospital Universitario Ramón y Cajal, Madrid, Spain
- CIBER en Enfermedades Infecciosas, Madrid, Spain
- Instituto Ramón y Cajal de Investigación Sanitaria, Madrid, Spain
| | - Laura Martínez-García
- Servicio de Microbiología, Hospital Universitario Ramón y Cajal, Madrid, Spain
- Centro de Investigación Biomédica en Red de Epidemiología y Salud Pública, Madrid, Spain
- Instituto Ramón y Cajal de Investigación Sanitaria, Madrid, Spain
| | - Desirée Gijón
- Servicio de Microbiología, Hospital Universitario Ramón y Cajal, Madrid, Spain
- CIBER en Enfermedades Infecciosas, Madrid, Spain
- Instituto Ramón y Cajal de Investigación Sanitaria, Madrid, Spain
| | - María Isabel Morosini
- Servicio de Microbiología, Hospital Universitario Ramón y Cajal, Madrid, Spain
- CIBER en Enfermedades Infecciosas, Madrid, Spain
- Instituto Ramón y Cajal de Investigación Sanitaria, Madrid, Spain
| | - Patricia Ruiz-Garbajosa
- Servicio de Microbiología, Hospital Universitario Ramón y Cajal, Madrid, Spain
- CIBER en Enfermedades Infecciosas, Madrid, Spain
- Instituto Ramón y Cajal de Investigación Sanitaria, Madrid, Spain
| | - Adrian Egli
- Applied Microbiology Research, Department of Biomedicine, University of Basel, Basel, Switzerland
- Division of Clinical Bacteriology and Mycology, University Hospital Basel, Basel, Switzerland
| | - Rafael Cantón
- Servicio de Microbiología, Hospital Universitario Ramón y Cajal, Madrid, Spain
- CIBER en Enfermedades Infecciosas, Madrid, Spain
- Instituto Ramón y Cajal de Investigación Sanitaria, Madrid, Spain
| | - Patricia Muñoz
- Clinical Microbiology and Infectious Diseases Department, Hospital General Universitario Gregorio Marañón, Madrid, Spain
- Institute of Health Research Gregorio Marañón, Madrid, Spain
- CIBER de Enfermedades Respiratorias, CIBERES CB06/06/0058, Madrid, Spain
- Medicine Department, Faculty of Medicine, Universidad Complutense de Madrid, Madrid, Spain
| | - David Rodríguez-Temporal
- Clinical Microbiology and Infectious Diseases Department, Hospital General Universitario Gregorio Marañón, Madrid, Spain
- Institute of Health Research Gregorio Marañón, Madrid, Spain
| | - Belén Rodríguez-Sánchez
- Clinical Microbiology and Infectious Diseases Department, Hospital General Universitario Gregorio Marañón, Madrid, Spain
- Institute of Health Research Gregorio Marañón, Madrid, Spain
| |
Collapse
|
24
|
Wang P, Ma L, Ge J, Feng F, Wan Q, Zeng D, Yu X. Colonization Mechanism of Endophytic Enterobacter cloacae TMX-6 on Rice Seedlings Mediated by Organic Acids Exudated from Roots. J Agric Food Chem 2023; 71:4802-4809. [PMID: 36921065 DOI: 10.1021/acs.jafc.2c08647] [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: 06/18/2023]
Abstract
Small molecular organic acids (SMOAs) in root exudates are critical for plant-microbe interaction, especially under environmental stresses. However, the dominant organic acids driving the process and promoting the colonization are unclear. Here, using a target metabolomics, 20 main SMOAs of rice root exudates were identified and analyzed in control and 10 mg/L thiamethoxam-treated groups. The composition of these SMOAs differed significantly between the two treatments. Among which, malic acid, citric acid, succinic acid, and proline induced a chemotactic response, swimming ability, and biofilm formation of Enterobacter cloacae TMX-6 in a dose-dependent manner. The maximal chemotactic response of TMX-6 was induced by proline at 10 mg/L, and a strong chemotactic response was even observed at 0.01 mg/L. The recruitment assay confirmed that the addition of these four compounds promoted the colonization of TMX-6. The results provide insight for directional regulation of plant-microbe interactions for beneficial outcomes.
Collapse
Affiliation(s)
- Pei Wang
- Guangxi Key Laboratory of Agrio-Environment and Agric-Product Safety, National Demonstration Center for Experimental Plant Science Education, College of Agriculture, Guangxi University, Nanning, Guangxi 530004, People's Republic of China
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base of Ministry of Science and Technology, Jiangsu Academy of Agricultural Sciences, Nanjing, Jiangsu 210014, People's Republic of China
| | - Liya Ma
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base of Ministry of Science and Technology, Jiangsu Academy of Agricultural Sciences, Nanjing, Jiangsu 210014, People's Republic of China
| | - Jing Ge
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base of Ministry of Science and Technology, Jiangsu Academy of Agricultural Sciences, Nanjing, Jiangsu 210014, People's Republic of China
| | - Fayun Feng
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base of Ministry of Science and Technology, Jiangsu Academy of Agricultural Sciences, Nanjing, Jiangsu 210014, People's Republic of China
| | - Qun Wan
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base of Ministry of Science and Technology, Jiangsu Academy of Agricultural Sciences, Nanjing, Jiangsu 210014, People's Republic of China
| | - Dongqiang Zeng
- Guangxi Key Laboratory of Agrio-Environment and Agric-Product Safety, National Demonstration Center for Experimental Plant Science Education, College of Agriculture, Guangxi University, Nanning, Guangxi 530004, People's Republic of China
| | - Xiangyang Yu
- Guangxi Key Laboratory of Agrio-Environment and Agric-Product Safety, National Demonstration Center for Experimental Plant Science Education, College of Agriculture, Guangxi University, Nanning, Guangxi 530004, People's Republic of China
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base of Ministry of Science and Technology, Jiangsu Academy of Agricultural Sciences, Nanjing, Jiangsu 210014, People's Republic of China
| |
Collapse
|
25
|
Mohammadzadeh A, Kadhim MM, Taban TZ, Baigenzhenov O, Ivanets A, Lal B, Kumar N, Hosseini-Bandegharaei A. Adsorption performance of Enterobacter cloacae towards U(VI) ion and application of Enterobacter cloacae/carbon nanotubes to preconcentration and determination of low-levels of U(VI) in water samples. Chemosphere 2023; 311:136804. [PMID: 36228723 DOI: 10.1016/j.chemosphere.2022.136804] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [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: 06/12/2022] [Revised: 10/01/2022] [Accepted: 10/05/2022] [Indexed: 06/16/2023]
Abstract
Keeping the high potential of some microorganisms in adsorption of radionuclides in view, the adsorption properties of Enterobacter cloacae towards uranium were attentively scrutinized, and then it was used for preconcentration of uranium in different samples, using Enterobacter cloacae/carbon nanotube composite. First, using ultrasonic agitation, the effects of operational factors on biosorption of uranium on the inactive Enterobacter cloacae were appraised and modeled by central composite design, and a comprehensive study was performed on the equilibrium, kinetics, thermodynamic, and selectivity aspects of biosorption. The optimization studies along with the evaluations of the adsorption properties revealed that Enterobacter cloacae have a high affinity for fast and selective biosorption of uranium ions, at pH 5.1. Second, the Enterobacter cloacae/carbon nanotube was synthesized, characterized, and utilized for preconcentration of uranium in different samples, using a mini-column packed with the composite. The optimization of operational factors on recovery of uranium, using the central composite design, showed that uranium can be quantitively adsorbed at a sample flow rate lower than 4.5 mL min-1 and the desorption could be accomplished with 3.0 mL HCl 0.6 M solution. Finally, the mini-column was exploited for preconcentration and determination of uranium in different samples. The results revealed the low detection limit (0.015 μg.L-1), high precision (RSDs ≤3.92%), and good accuracy of the proposed procedure.
Collapse
Affiliation(s)
- Alireza Mohammadzadeh
- Department of Microbiology, Faculty of Medicine, Infectious Diseases Research Center, Gonabad University of Medical Sciences, Gonabad, Iran
| | - Mustafa M Kadhim
- Medical Laboratory Techniques Department, Al-Farahidi University, Baghdad, Iraq
| | - Talib Zeedan Taban
- Laser and Optoelectronics Engineering Department, Kut University College, Kut, Wasit, 52001, Iraq
| | - Omirserik Baigenzhenov
- Department of Metallurgical Sciences, Satbayev University, 22a Satbaev Str., Almaty, 050013, Kazakhstan.
| | - Andrei Ivanets
- Institute of General and Inorganic Chemistry of National Academy of Sciences of Belarus, St. Surganova 9/1, 220072, Minsk, Belarus
| | - Basant Lal
- Department of Chemistry, Institute of Applied Science and Humanities, GLA University, Mathura, 281406, India
| | - Naveen Kumar
- Department of Chemistry, Maharshi Dayanand University, Rohtak, 124001, India
| | | |
Collapse
|
26
|
Woźniak A, Burzyńska N, Zybała I, Empel J, Grinholc M. Priming effect with photoinactivation against extensively drug-resistant Enterobacter cloacae and Klebsiella pneumoniae. J Photochem Photobiol B 2022; 235:112554. [PMID: 36095975 DOI: 10.1016/j.jphotobiol.2022.112554] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 04/12/2022] [Revised: 08/27/2022] [Accepted: 08/31/2022] [Indexed: 06/15/2023]
Abstract
In this study, we present antimicrobial blue light (aBL) and antimicrobial photoinactivation with green light in the presence of Rose Bengal (aPDI) to modulate the susceptibility of extensively drug-resistant (XDR) Enterobacter cloacae and Klebsiella pneumoniae clinical isolates to antimicrobials. This process can be considered a photodynamic priming tool that influences other therapeutic options, such as antibiotics. The current study evaluated the different environments to estimate the most effective priming conditions by testing a broad spectrum of antimicrobials (including antimicrobials with different targets and mechanisms of action). The susceptibility of the E. cloacae and K. pneumoniae clinical isolates to various antibiotics after aBL and green light (with rose bengal) as aPDI treatment was examined with multiple methods of synergy testing (e.g., diffusion methods, checkerboard assay, postantibiotic effect), and most effective photoinactivation conditions were implemented for each environment. When Enterobacteriaceae were exposed to aBL, the most efficient reduction in survival rate under TSB conditions was observed. Similar results were observed when rose bengal, as a photosensitizer, was present during the exposure to green light in PBS. aBL and aPDI led to an increased susceptibility of K. pneumoniae and E. cloacae isolates to chloramphenicol and colistin or fosfomycin and colistin antibiotics, respectively. However, among the 4 tested isolates, we observed synergies between different antimicrobial agents and photoinactivation conditions. Thus, it may suggest that the sensitization process may be considered a strain dependent priming tool.
Collapse
Affiliation(s)
- Agata Woźniak
- Laboratory of Photobiology and Molecular Diagnostics, Intercollegiate Faculty of Biotechnology, University of Gdansk and Medical University of Gdansk, 80-307 Gdansk, Poland
| | - Natalia Burzyńska
- Laboratory of Photobiology and Molecular Diagnostics, Intercollegiate Faculty of Biotechnology, University of Gdansk and Medical University of Gdansk, 80-307 Gdansk, Poland
| | - Izabela Zybała
- Laboratory of Photobiology and Molecular Diagnostics, Intercollegiate Faculty of Biotechnology, University of Gdansk and Medical University of Gdansk, 80-307 Gdansk, Poland
| | - Joanna Empel
- Department of Epidemiology and Clinical Microbiology, National Medicines Institute, Warsaw, Poland
| | - Mariusz Grinholc
- Laboratory of Photobiology and Molecular Diagnostics, Intercollegiate Faculty of Biotechnology, University of Gdansk and Medical University of Gdansk, 80-307 Gdansk, Poland.
| |
Collapse
|
27
|
Rajarajan M, Madduri B, Mohan N, Fernandes M. Enterobacter cloacae Keratitis: Clinicomicrobiological Profiles, Risk Factors, and Outcomes. Cornea 2022; 41:1110-1115. [PMID: 35587442 DOI: 10.1097/ico.0000000000003036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Accepted: 02/17/2022] [Indexed: 11/03/2022]
Abstract
PURPOSE The purpose of the study was to report the clinical features, risk factors, antibiotic susceptibility, and treatment outcomes in a series of Enterobacter cloacae keratitis. METHODS A retrospective analysis was performed of the electronic medical records of microbial keratitis caused by E. cloacae identified by the Vitek 2 system (BioMerieux, Craponne, France). We collected data pertaining to demographics, risk factors, ulcer characteristics, antibiogram, visual acuity at presentation and final follow-up, and management outcome. The main outcome measure was resolution of infection. The final visual acuity was the secondary outcome measure. RESULTS Ten episodes of E. cloacae keratitis in 9 patients were identified between January 2009 and December 2019. Nine (90%) cases had undergone penetrating keratoplasty and 8 were failed grafts. Other risk factors included topical steroid use and irregular ocular surface due to epithelial bullae. The mean ulcer size was 17.55 ± 13.99 mm 2 . More than 80% of isolates were sensitive to chloramphenicol, gentamicin, and colistin. Nine (90%) cases healed on medical management within 56.55 ± 26.74 days (range 9-120 d), although almost all required adjunctive procedures: tissue adhesive application (n = 6) and/or tarsorrhaphy (n = 4). One case with a near total infiltrate had a mixed infection with Kocuria kristinae requiring therapeutic penetrating keratoplasty. One case developed endophthalmitis and phthisis after the corneal infiltrate resolved. CONCLUSIONS E. cloacae keratitis is a rare clinical entity seen more often in immunocompromised host conditions such as failed corneal transplants with concomitant topical steroids. Most cases healed with medical management.
Collapse
Affiliation(s)
- Mugundhan Rajarajan
- Cornea and Anterior Segment Service, The Cornea Institute, LV Prasad Eye Institute, GMR Varalakshmi Campus, Visakhapatnam, India; and
| | - Bhagyasree Madduri
- Ocular Microbiology Service, LV Prasad Eye Institute, GMR Varalakshmi Campus, Visakhapatnam, India
| | - Nitin Mohan
- Ocular Microbiology Service, LV Prasad Eye Institute, GMR Varalakshmi Campus, Visakhapatnam, India
| | - Merle Fernandes
- Cornea and Anterior Segment Service, The Cornea Institute, LV Prasad Eye Institute, GMR Varalakshmi Campus, Visakhapatnam, India; and
| |
Collapse
|
28
|
Acín P, Luque S, Sorli L, Grau S. Therapeutic drug monitoring of colistin in plasma and cerebrospinal fluid in meningoventriculitis caused by a carbapenem-resistant Enterobacter cloacae. Enferm Infecc Microbiol Clin (Engl Ed) 2022; 40:277-278. [PMID: 35577447 DOI: 10.1016/j.eimce.2021.02.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Accepted: 02/19/2021] [Indexed: 06/15/2023]
Affiliation(s)
- Pablo Acín
- Pharmacy Department, Hospital del Mar, Parc de Salut Mar, Barcelona, Spain
| | - Sonia Luque
- Pharmacy Department, Hospital del Mar, Parc de Salut Mar, Barcelona, Spain; Institut Hospital del Mar d'Investigacions Mèdiques (IMIM), Barcelona, Spain; Infectious Pathology and Antimicrobials Research Group (IPAR), Institut Hospital del Mar d'Investigacions Mèdiques (IMIM), Barcelona, Spain.
| | - Luisa Sorli
- Institut Hospital del Mar d'Investigacions Mèdiques (IMIM), Barcelona, Spain; Infectious Pathology and Antimicrobials Research Group (IPAR), Institut Hospital del Mar d'Investigacions Mèdiques (IMIM), Barcelona, Spain; Infectious Diseases Department, Hospital del Mar, Parc de Salut Mar, Barcelona, Spain; Universitat Pompeu Fabra, Barcelona, Spain
| | - Santiago Grau
- Pharmacy Department, Hospital del Mar, Parc de Salut Mar, Barcelona, Spain; Institut Hospital del Mar d'Investigacions Mèdiques (IMIM), Barcelona, Spain; Infectious Pathology and Antimicrobials Research Group (IPAR), Institut Hospital del Mar d'Investigacions Mèdiques (IMIM), Barcelona, Spain; Universitat Autònoma de Barcelona, Barcelona, Spain
| |
Collapse
|
29
|
Priyanka JV, Rajalakshmi S, Senthil Kumar P, Krishnaswamy VG, Al Farraj DA, Elshikh MS, Abdel Gawwad MR. Bioremediation of soil contaminated with toxic mixed reactive azo dyes by co-cultured cells of Enterobacter cloacae and Bacillus subtilis. Environ Res 2022; 204:112136. [PMID: 34592251 DOI: 10.1016/j.envres.2021.112136] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [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: 04/15/2021] [Revised: 08/18/2021] [Accepted: 09/24/2021] [Indexed: 06/13/2023]
Abstract
Azo dyes, known for its toxicity and mutagenicity, are used by textile industries. Bioremediation serves the best alternative treatment process due to its eco-friendly nature and cost-effectiveness. Degradation using individual bacteria promotes azo dye removal, while the degradation is enhanced using the immobilization method. Bio-carrier promotes the attachment of the bacterial strains and increases azo dye degradation. The present study focuses on the biodegradation of Reactive Red (RR), Reactive Brown (RB), Reactive Black dye (RBL), and mixed dyes in a soil slurry bioreactor containing free cells, co-culture, and immobilized cells. The physico-chemical analysis and soil characteristics were determined. The free cells of Bacillus cereus showed degradation of azo dyes - 79.42 ± 0.03% RR, 78.78 ± 0.02% RBL; 70.76 ± 0.03% RB, and 84.89 ± 0.05% of mixed dyes respectively. Enterobacter cloacae free cells resulted in degradation of 72.87 ± 0.01% RR, 75.21 ± 0.01% RBL, 74.50 ± 0.02% RB, and 73.39 ± 0.04% mixed dyes respectively. Co-cultured bacterial strains resulted in 77.18 ± 0.03% RR, 80.27 ± 0.02% RBL, 76.97 ± 0.02% RB and 86.29 ± 0.05% mixed dyes respectively. The immobilization of Bacillus cereus and Enterobacter cloacae on 2% corn starch resulted in 98.4 ± 0.01% degradation of RR, 89.8 ± 0.09% degradation of RB, 99.4 ± 0.05% of RBL, and 98.1 ± 0.08% of mixed reactive dyes respectively.
Collapse
Affiliation(s)
- J V Priyanka
- Department of Biotechnology, Stella Maris College (Autonomous), Affiliated to University of Madras, Chennai, Tamil Nadu, India
| | - S Rajalakshmi
- Department of Biotechnology, Stella Maris College (Autonomous), Affiliated to University of Madras, Chennai, Tamil Nadu, India
| | - Ponnusamy Senthil Kumar
- Department of Chemical Engineering, Sri SivasubramaniyaNadar College of Engineering, Kalavakkam, Chennai, 603 110, India.
| | - Veena Gayathri Krishnaswamy
- Department of Biotechnology, Stella Maris College (Autonomous), Affiliated to University of Madras, Chennai, Tamil Nadu, India.
| | - Dunia A Al Farraj
- Department of Botany and Microbiology, College of Sciences, King Saud University, P.O. Box 22452, Riyadh, 11495, Saudi Arabia
| | - Mohamed S Elshikh
- Department of Botany and Microbiology, College of Sciences, King Saud University, P.O. Box 22452, Riyadh, 11495, Saudi Arabia
| | - Mohamed Ragab Abdel Gawwad
- Genetics & Bioengineering, Faculty of Engineering and Natural Sciences, International University of Sarajevo, Bosnia and Herzegovina
| |
Collapse
|
30
|
Al-Eqabi SRS, Ismail Ibrahim Z, Jamal Mohammed Jawad Z. Immunopathological Changes Post-Infection with Enterobacter cloacae in Rabbits. Arch Razi Inst 2022; 77:179-186. [PMID: 35891732 PMCID: PMC9288590 DOI: 10.22092/ari.2022.357468.2044] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Accepted: 01/16/2022] [Indexed: 05/28/2023]
Abstract
Nosocomial infections have serious effects on health conditions in humans and animals. The present study aimed to investigate the pathogenesis of Enterobacter cloacae post intraperitoneal inoculation in rabbits to investigate the immunological and possible pathological effects. A total of 42 rabbits were randomly divided into two equal groups (n=21). The first group was inoculated with 3×108 CFU/ml of the virulent isolate of E. cloacae intraperitoneally (IP), while the second group was injected IP with phosphate buffer saline and considered a control negative group. The animals were sacrificed at different time post-infection at 48/72 h, and at day 7 post-bacterial inoculation. The results revealed a significant increase in the concentration of TNF-α, especially in the infected groups. In addition, there were different pathological lesions in different organs of animals, mainly in the infected groups, which represents by vascular congestion and edema with polymorphoneutrophiles infiltration in the lungs, kidneys, and heart. This study is considered the first trial which aimed to observe the pathological changes of E. cloacae in vital organs in rabbits.
Collapse
Affiliation(s)
- S R S Al-Eqabi
- Department of Public Health, College of Veterinary Medicine, Wasit University, Wasit, Iraq
| | - Z Ismail Ibrahim
- Department of Pathology and Poultry Diseases, College of Veterinary Medicine, University of Baghdad, Baghdad, Iraq
| | - Z Jamal Mohammed Jawad
- Department of Pathology and Poultry Diseases, College of Veterinary Medicine, University of Baghdad, Baghdad, Iraq
| |
Collapse
|
31
|
Reynoso A, Munson E. Surveillance of Wisconsin Organisms for Trends in Antimicrobial Resistance and Epidemiology (SWOTARE): 2018-2019 Report on Enterobacter cloacae and Klebsiella pneumoniae Clinical Isolates. Clin Med Res 2021; 19:123-131. [PMID: 34531269 PMCID: PMC8445663 DOI: 10.3121/cmr.2021.1588] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 03/14/2021] [Accepted: 04/22/2021] [Indexed: 01/21/2023]
Abstract
Objectives: Both Enterobacter cloacae and Klebsiella pneumoniae have been regarded as important opportunistic pathogens for humans. Recent data have described the spread of multi-resistant strains of these organisms. Development of novel resistance phenotypes may result in a reduction in anti-infective efficacy, therefore making patient treatment decisions challenging. The Surveillance of Wisconsin Organisms for Trends in Antimicrobial Resistance and Epidemiology (SWOTARE) program aims to combat this issue and improve antibiotic stewardship by monitoring antimicrobial resistance at a local level.Design: Multi-center laboratory surveillance, with testing at a single location utilizing standardized media and susceptibility testing protocolsMethods: In the years 2018 and 2019, a total of 591 clinically-significant E. cloacae and 668 clinically-significant K. pneumoniae isolates were collected through this initiative; limited demographic data were also supplied. Isolates were tested by broth microdilution procedures advocated by Clinical and Laboratory Standards Institute.Results: On a statewide level, both E. cloacae and K. pneumoniae demonstrated in vitro potency to carbapenem and aminoglycoside agents at rates exceeding 96%. K. pneumoniae isolates were generally more susceptible to cephem and monobactam agents than E. cloacae isolates; the converse was true for fluoroquinolone agents. Patterns of local antimicrobial resistance were revealed that were not apparent at the state level. E. cloacae isolates submitted from the Northcentral and Southeast regions demonstrated decreased susceptibility to five antimicrobial agents (notably third- and fourth-generation cephems) when compared to the state average. Isolates derived from males, older individuals, and urogenital sources exhibited decreased susceptibility to third- and fourth-generation cephem agents (P ≤ 0.047). With respect to K. pneumoniae, antimicrobial resistance phenotype was not a function of geography or gender. However, isolates emanating from older patients and the respiratory tract showed decreased susceptibility to ampicillin/sulbactam and cefazolin, respectively (P ≤ 0.019).Conclusions: Antimicrobial resistance surveillance at a local level provides utility to community/rural hospital clinicians, pharmacists, and infection control practitioners. With respect to E. cloacae, further surveillance efforts may be necessary in the Northcentral and Southeast regions of Wisconsin. Subanalysis of demographic data indicated cephem-resistance correlates that are not apparent at the statewide level.
Collapse
Affiliation(s)
- Alyssa Reynoso
- College of Health Sciences, Marquette University, Milwaukee, Wisconsin USA
| | - Erik Munson
- College of Health Sciences, Marquette University, Milwaukee, Wisconsin USA
- Wisconsin Clinical Laboratory Network Laboratory Technical Advisory Group, Madison, Wisconsin USA
| |
Collapse
|
32
|
Qian W, Li X, Yang M, Mao G. Antibacterial and anti-biofilm activities of paeonol against Klebsiella pneumoniae and Enterobacter cloacae. Biofouling 2021; 37:666-679. [PMID: 34320877 DOI: 10.1080/08927014.2021.1955249] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [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: 04/02/2021] [Revised: 07/02/2021] [Accepted: 07/10/2021] [Indexed: 06/13/2023]
Abstract
Paeonol, the active ingredient of Paeonia lactiflora root bark, is widely used in traditional Chinese medicine. Few studies have reported the antibacterial activity of paeonol against bacterial pathogens. In this study, the antibacterial and anti-biofilm performance of paeonol against Klebsiella pneumoniae and Enterobacter cloacae was investigated as well as its mechanisms of action. Paeonol effectively inhibited the growth of K. pneumoniae and E. cloacae with a minimum inhibitory concentration of 64 μg ml-1 and it was shown to disrupt the integrity of bacterial cell membranes, and alter cell morphology. Moreover, paeonol exhibited a potent inhibitory effect against adhesion and biofilm formation by K. pneumoniae and E. cloacae. In particular, paeonol efficiently compromised cells within biofilms, and dispersed mature biofilms. Therefore, the present study suggests that paeonol is a promising alternative antibacterial and anti-biofilm agent for combating infections caused by planktonic and biofilm cells of K. pneumoniae and E. cloacae.
Collapse
Affiliation(s)
- Weidong Qian
- School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi'an, P. R. China
| | - Xinchen Li
- School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi'an, P. R. China
| | - Min Yang
- School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi'an, P. R. China
| | - Gennian Mao
- School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi'an, P. R. China
| |
Collapse
|
33
|
Gallagher JC. Bacteria Keep Reminding Us: There Are No Silver Bullets. Clin Infect Dis 2020; 71:2717-2718. [PMID: 32236418 DOI: 10.1093/cid/ciaa361] [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] [Received: 03/18/2020] [Accepted: 03/30/2020] [Indexed: 12/17/2023] Open
Affiliation(s)
- Jason C Gallagher
- Department of Pharmacy Practice, Temple University School of Pharmacy, Philadelphia, Pennsylvania, USA
| |
Collapse
|
34
|
Xu Z, Wang D, Tang W, Wang L, Li Q, Lu Z, Liu H, Zhong Y, He T, Guo S. Phytoremediation of cadmium-polluted soil assisted by D-gluconate-enhanced Enterobacter cloacae colonization in the Solanum nigrum L. rhizosphere. Sci Total Environ 2020; 732:139265. [PMID: 32416401 DOI: 10.1016/j.scitotenv.2020.139265] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [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: 03/08/2020] [Revised: 04/23/2020] [Accepted: 05/05/2020] [Indexed: 06/11/2023]
Abstract
Microbe-assisted phytoremediation for Cd-polluted soil is being regarded increasingly. However, the availability of microbes that can collaborate with Cd-hyperaccumulators effectively has become one of bottlenecks restricting the remediation efficiency. A siderophore-producing bacterium (Y16; Enterobacter cloacae) isolated from the rhizospheric soil of Cd-hyperaccumulator Solanum nigrum L. was identified by 16S rRNA gene sequencing and biochemical analysis, and then used for analyzing microbial chemotaxis, carbon source utilization, and insoluble P/Cd mobilization capacities. Besides, a soil-pot trial was performed to underlie the phytoremediation mechanism of Cd-polluted soil assisted by D-gluconate-enhanced Enterobacter cloacae colonization (DEYC) in the Solanum nigrum L. rhizosphere. Results displayed that D-gluconate was an effective chemoattractant and carbon source strengthening Y16 colonization, and Y16 exhibited strong abilities to mobilize insoluble P/Cd in shake flask by extracellular acidification (p < 0.05). In the soil-pot trial, DEYC observably enhanced soil Cd phytoextraction by Solanum nigrum L., and increased microbial diversity according to alpha- and beta-diversity analysis (p < 0.05). Taxonomic distribution and co-occurrence network analysis suggested that DEYC increased relative abundances of dominant microbial taxa associated with soil acidification (Acidobacteria-6), indoleacetic acid secretion (Ensifer adhaerens), soil fertility improvement (Flavisolibacter, Bdellovibrio bacteriovorus, and Candidatus nitrososphaera), and insoluble Cd mobilization (Massilia timonae) at different classification levels. Importantly, COGs analysis further shown that DEYC aroused the up-regulation of key genes related to chemotactic motility, carbon fixation, TCA cycle, and propanoate metabolism. These results indicated that DEYC drove the rhizospheric enrichment of pivotal microbial taxa directly or indirectly involved in soil Cd mobilization, meanwhile distinctly promoted plant growth for accumulating more mobilizable Cd. Therefore, Y16 could be used as bio-inoculants for assisting phytoremediation of Cd-polluted soil.
Collapse
Affiliation(s)
- Zhimin Xu
- School of Environmental Science and Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China; Key Laboratory of Environmental Pollution and Health of Guangdong Province, School of Environment, Jinan University, Guangzhou 510632, China; Guangdong Provincial Engineering and Technology Research Center for Agricultural Land Pollution Prevention and Control, Guangzhou 510225, China
| | - Dongsheng Wang
- Key Laboratory of Environmental Pollution and Health of Guangdong Province, School of Environment, Jinan University, Guangzhou 510632, China
| | - Wanpeng Tang
- Key Laboratory of Environmental Pollution and Health of Guangdong Province, School of Environment, Jinan University, Guangzhou 510632, China
| | - Lili Wang
- Key Laboratory of Environmental Pollution and Health of Guangdong Province, School of Environment, Jinan University, Guangzhou 510632, China.
| | - Qusheng Li
- Key Laboratory of Environmental Pollution and Health of Guangdong Province, School of Environment, Jinan University, Guangzhou 510632, China
| | - Ziyan Lu
- School of Environmental Science and Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China; Guangdong Provincial Engineering and Technology Research Center for Agricultural Land Pollution Prevention and Control, Guangzhou 510225, China
| | - Hui Liu
- School of Environmental Science and Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China; Guangdong Provincial Engineering and Technology Research Center for Agricultural Land Pollution Prevention and Control, Guangzhou 510225, China
| | - Yuming Zhong
- School of Environmental Science and Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China; Guangdong Provincial Engineering and Technology Research Center for Agricultural Land Pollution Prevention and Control, Guangzhou 510225, China
| | - Tao He
- Key Laboratory of Environmental Pollution and Health of Guangdong Province, School of Environment, Jinan University, Guangzhou 510632, China
| | - Shihong Guo
- Fujian Provincial Academy of Environmental Science, Fuzhou 350013, China
| |
Collapse
|
35
|
Ma TF, Chen YP, Fang F, Yan P, Shen Y, Kang J, Nie YD. Effects of ZnO nanoparticles on aerobic denitrifying bacteria Enterobacter cloacae strain HNR. Sci Total Environ 2020; 725:138284. [PMID: 32276046 DOI: 10.1016/j.scitotenv.2020.138284] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 02/05/2020] [Revised: 03/23/2020] [Accepted: 03/26/2020] [Indexed: 06/11/2023]
Abstract
The aerobic denitrification process is a promising and cost-effective alternative to the conventional nitrogen removal process. Widely used ZnO nanoparticles (NPs) will inevitably reach wastewater treatment plants, and cause adverse impacts on aerobic denitrification and nitrogen removal. Therefore, a full understanding of the responses and adaption of aerobic denitrifiers to ZnO NPs is essential to develop effective strategies to reduce adverse effects on wastewater treatment. In this study, the responses and adaption to ZnO NPs were investigated of a wild type strain (WT) and a resistant type strain (Re) of aerobic denitrifying bacteria Enterobacter cloacae strain HNR. When exposed to 0.75 mM ZnO NPs, the nitrate removal efficiency of Re was 11.2% higher than that of WT. To prevent ZnO NPs entering cells by adsorption, the production of extracellular polymeric substances (EPS) of WT and Re strains increased 13.2% and 43.9%, respectively. The upregulations of amino sugar and carbohydrate-related metabolism contributed to the increase of EPS production, and the increased nitrogen metabolism contributed to higher activities of nitrate and nitrite reductases. Interestingly, cationic antimicrobial peptide resistance contributed to resist Zn (II) released by ZnO NPs, and many antioxidative stress-related metabolism pathways were upregulated to resist the oxidative stress resulting from ZnO NPs. These findings will guide efforts to improve the aerobic denitrification process in an environment polluted by NPs, and promote the application of aerobic denitrification technologies.
Collapse
Affiliation(s)
- Teng-Fei Ma
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China; National Research Base of Intelligent Manufacturing Service, Chongqing Technology and Business University, Chongqing 400067, China; Chongqing South-to-Thais Environmental Protection Technology Research lnstitute Co., Ltd., Chongqing 400069, China
| | - You-Peng Chen
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China
| | - Fang Fang
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China
| | - Peng Yan
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China.
| | - Yu Shen
- National Research Base of Intelligent Manufacturing Service, Chongqing Technology and Business University, Chongqing 400067, China; Chongqing South-to-Thais Environmental Protection Technology Research lnstitute Co., Ltd., Chongqing 400069, China
| | - Jia Kang
- North China Univ Water Resources & Elect Power, Key Lab Water Environment Simulatation & Governance Henan, Zhengzhou 460046, Henan, China
| | - Yu-Dong Nie
- Engineering Research Centre for Waste Oil Recovery Technology and Equipment, Chongqing Technology and Business University, Chongqing 400067, China
| |
Collapse
|
36
|
Cao P, Li C, Tan K, Liu C, Xu X, Zhang S, Wang X, Zhao J, Xiang W. Characterization, Phylogenetic Analyses, and Pathogenicity of Enterobacter cloacae on Rice Seedlings in Heilongjiang Province, China. Plant Dis 2020; 104:1601-1609. [PMID: 32320370 DOI: 10.1094/pdis-12-19-2557-re] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [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: 06/11/2023]
Abstract
Rice is used as a staple food in different areas of world, especially in China. In recent years, rice seedlings have been affected seriously by symptoms resembling bacterial palea browning (BPB) in Heilongjiang Province. To isolate and identify the pathogenic bacteria responsible for the disease, 40 bacterial strains were isolated from diseased rice seedlings collected from the four major accumulative-temperature zones of rice fields cultivated in Heilongjiang Province, and these were identified as 13 species based on morphological characteristics and 16S ribosomal RNA (rRNA) gene sequences. Inoculation of all the isolates on healthy rice seedlings showed that the nine Enterobacter cloacae isolates were the pathogens causing typical symptoms of BPB, including yellowing to pale browning, stunting, withering, drying, and death. Moreover, the nine E. cloacae isolates could also cause symptoms of bacterial disease on the seedlings of soybean (Glycine max), maize (Zea mays L.), and tomato (Solanum lycopersicum). Phylogenetic analysis based on the 16S rRNA gene sequences and phenotypic and biochemical characteristics indicated that these nine pathogenic isolates were E. cloacae. In addition, analysis of the sequences of four housekeeping genes (rpoB, gyrB, infB, and atpD) from the selected strain SD4L also assigned the strain to E. cloacae. Therefore, E. cloacae is the pathogen causing disease of rice seedlings in Heilongjiang Province, which we propose to classify as a form of BPB. To the best of our knowledge, this is the first study to identify E. cloacae as a causal agent of BPB in rice.
Collapse
Affiliation(s)
- Peng Cao
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province, Northeast Agricultural University, 600 Changjiang Road, Xiangfang District, Harbin 150030, P.R. China
| | - Chenxu Li
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province, Northeast Agricultural University, 600 Changjiang Road, Xiangfang District, Harbin 150030, P.R. China
| | - Kefei Tan
- Qiqihar Branch of Heilongjiang Academy of Agricultural Sciences, Qiqihar, P.R. China
| | - Chuanzeng Liu
- Qiqihar Branch of Heilongjiang Academy of Agricultural Sciences, Qiqihar, P.R. China
| | - Xi Xu
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province, Northeast Agricultural University, 600 Changjiang Road, Xiangfang District, Harbin 150030, P.R. China
| | - Shaoyong Zhang
- Key Laboratory of Vector Biology and Pathogen Control of Zhejiang Province, College of Life Science, Huzhou University, Huzhou, P.R. China
| | - Xiangjing Wang
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province, Northeast Agricultural University, 600 Changjiang Road, Xiangfang District, Harbin 150030, P.R. China
| | - Junwei Zhao
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province, Northeast Agricultural University, 600 Changjiang Road, Xiangfang District, Harbin 150030, P.R. China
| | - Wensheng Xiang
- Key Laboratory of Agricultural Microbiology of Heilongjiang Province, Northeast Agricultural University, 600 Changjiang Road, Xiangfang District, Harbin 150030, P.R. China
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, P.R. China
| |
Collapse
|
37
|
Chen SC, Lin WH, Chien CC, Tsang DCW, Kao CM. Development of a two-stage biotransformation system for mercury-contaminated soil remediation. Chemosphere 2018; 200:266-273. [PMID: 29494907 DOI: 10.1016/j.chemosphere.2018.02.085] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [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: 10/31/2017] [Revised: 02/13/2018] [Accepted: 02/14/2018] [Indexed: 06/08/2023]
Abstract
Utilization of bacterial volatilization can be problematic to remediate mercury (Hg)-contaminated soils because most of the Hg in soils is bound to soil particles. The objective of this study was to develop a two-stage system (chemical extraction followed by microbial reduction) for Hg-contaminated soil remediation. The tasks were to (1) select the extraction reagents for Hg extraction, (2) assess the effects of extraction reagents on the growth of Hg-reducing bacterial strains, and (3) evaluate the effectiveness of Ca2+ and Mg2+ addition on merA gene (Hg reductase) induction. Bacterial inhibition was observed with the addition of 0.1 M ethylenediaminetetraacetic acid or citric acid. Up to 65% of Hg was biotransformed (Hg concentration = 69 mg/kg) from the soils after a 24 h extraction using 0.5 M ammonium thiosulfate. Ca2+ and Mg2+ were selected because they have the same electric charge as Hg and the studied groundwater contained high concentrations of Ca2+ and Mg2+. Results showed that the addition of 200 mg/L Ca2+ or 650 mg/L Mg2+ could reach effective merA induction. In the two-stage experiment, 120 mg/kg Hg-contaminated soils were extracted with 2 rounds of extraction processes for 10 h using 0.5 M ammonium thiosulfate. Approximately 77% of Hg was extracted from the soils after the first-step extraction process. Up to 81% of Hg2+ was transformed from the washing solution via the biotransformation processes with Enterobacter cloacae addition and Ca2+ and Mg2+ supplementation. The two-stage remedial system has the potential to be developed into a practical technology to remediate Hg-contaminated sites.
Collapse
Affiliation(s)
- S C Chen
- Department of Life Sciences, National Central University, Chung-Li, Taiwan
| | - W H Lin
- Institute of Environmental Engineering, National Sun Yat-Sen University, Kaohsiung, Taiwan
| | - C C Chien
- Graduate School of Biotechnology & Bioengineering, Yuan Ze University, Taoyuan City, Taiwan
| | - D C W Tsang
- Department of Civil and Environmental Engr., Hong Kong Polytechnic University, Hung Hom, Hong Kong
| | - C M Kao
- Institute of Environmental Engineering, National Sun Yat-Sen University, Kaohsiung, Taiwan.
| |
Collapse
|
38
|
Das A, Belgaonkar P, Raman AS, Banu S, Osborne JW. Bioremoval of lead using Pennisetum purpureum augmented with Enterobacter cloacae-VITPASJ1: A pot culture approach. Environ Sci Pollut Res Int 2017; 24:15444-15453. [PMID: 28509939 DOI: 10.1007/s11356-017-8988-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [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: 09/19/2016] [Accepted: 04/03/2017] [Indexed: 06/07/2023]
Abstract
Lead is a toxic heavy metal discharged into the ecosystem from various industries. Biological remediation strategies have been effective in the bioremoval of lead. In our current study, a phytobacterial system using Pennisetum purpureum along with lead-resistant bacterium (LRB) was employed for the uptake of lead. The LRB was obtained from lead-contaminated sites. The isolate VITPASJ1 was found to be highly tolerant to lead and was identified as an effective plant growth-promoting bacterium. The 16S rRNA sequencing revealed VITPASJ1 to be the closest neighbour of Enterobacter cloacae. The lead-resistant gene pbrA in the plant and the bacterium were amplified using a specific primer. The uptake of lead was studied by phytoremediation and rhizoremediation set-ups where the soil was supplemented with various concentrations of lead (50, 100, 150 mg/kg). The plants were uprooted at regular intervals, and the translocation of lead into the plant was determined by atomic absorption spectroscopy. The root length, shoot height and chlorophyll content were found to be higher in the rhizoremediation set-up when compared to the phytoremediation set-up. The scanning electron microscopic micrographs gave a clear picture of increased tissue damage in the root and shoot of the phytoremediation set-up as compared to the rhizoremediation set-up with LRB.
Collapse
Affiliation(s)
- Anamika Das
- School of Biosciences and Technology, VIT University, Vellore, Tamil Nadu, 632014, India
| | - Priyanka Belgaonkar
- School of Biosciences and Technology, VIT University, Vellore, Tamil Nadu, 632014, India
| | - Aditya S Raman
- School of Biosciences and Technology, VIT University, Vellore, Tamil Nadu, 632014, India
| | - Sofia Banu
- School of Biosciences and Technology, VIT University, Vellore, Tamil Nadu, 632014, India
| | - Jabez W Osborne
- School of Biosciences and Technology, VIT University, Vellore, Tamil Nadu, 632014, India.
| |
Collapse
|
39
|
Zhao Q, Jia X, Pang F, Li Y. [Study on genotype and clinical characteristics of infection of carbapenemase-producing Enterobacter cloacae]. Zhonghua Yi Xue Za Zhi 2015; 95:3264-3268. [PMID: 26815344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
OBJECTIVE To study the genotypes and clinical characteristics of carbapenemase-producing Enterobacter cloacae (E.cloacae), and lay the foundation for active control of nosocomial infection. METHODS E.cloacae isolates were collected from January 2007 to December 2014. Strains which showed decreased sensitivity to carbapenem were screened out by the modified Hodge test (MHT) and EDTA-disk synergy test. The genotype of blaKPC, blaIMP, blaVIM, blaOXA-48 and blaNDM-1 were detected by PCR amplication, the product of PCR was sequenced and conducted by Blast (http://blast.ncbi.nlm.nih.gov/Blast.cgi). Conjugal transfer experiment was conducted to prove horizontal transmit of carbapenemase gene produced by E.cloacae. Meanwhile, the clinical epidemiological data of patients infected by selected strains were also analyzed. RESULTS Sixty-four carbapenemase producing E.cloacae were detected by MHT, EDTA-disk synergy test and PCR amplification. Forty-five strains (70.3%) out of 64 strains infection came from nosocomial infection, while 19 strains (29.7%) from the community infection. The strains were mainly isolated from secretions samples and sputum samples, which accounted for 65.6% (42/64) and 23.4% (15/64) separately. The mainly clinical departments were orthopaedics (43.8%), department of burn (21.9%), ICU (18.8%) and pediatrics (14.1%). Bed changing, invasive operation and indwelling catheter were risk factors for the transmission of carbapenemase producing E.cloacae, and infected patients had longer time of staying in hospital, lower cure rate and higher frequency of cephalosporins enzyme inhibitor compound or carbapenem agents administration (all P<0.05). Sixty-four strains showed increased MIC to most of the antibiotics except for polymyxin and tigecycline. Among the 64 strains, 29 strains were genotype blaIMP-4 and 35 strains were genotype blaIMP-8 by Blast alignment, no genotype blaVIM, blaOXA-48 and blaNDM-1 were detected. Result of conjugal transfer experiment showed that receptor strain obtained carbapenem resistance, and the sequence of resistance gene of receptor strain was the same to the donator strain. CONCLUSIONS The drug resistance of E.cloacae are growing, IMP-4 and IMP-8 carbapenemase are the main enzymes produced by strains. As the resistance gene can horizontal transmit between strains through conjugal transfer system, the strains have been locally spread in hospital departments, thus it is important to control risk factors of transmission timely.
Collapse
Affiliation(s)
- Qigang Zhao
- Department of Clinical Laboratory, Liaocheng People's Hospital, Liaocheng 252000, China
| | | | | | | |
Collapse
|
40
|
Bahati B, Ma ZH, Abudouhaer A. [Time series analysis of Enterobacter cloacae nosocomial infections in children hospitalized in the pediatric intensive care unit]. Zhongguo Dang Dai Er Ke Za Zhi 2015; 17:946-949. [PMID: 26412176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
OBJECTIVE To characterize the time distribution of the incidence of Enterobacter cloacae nosocomial infections in children hospitalized in the pediatric intensive care unit (PICU) of the First Affiliated Hospital of Xinjiang Medical University. METHODS The clinical data of children with Enterobacter cloacae nosocomial infections in the PICU of the First Affiliated Hospital of Xinjiang Medical University between January 2010 and December 2013 were collected. The monthly number of cases of Enterobacter cloacae nosocomial infections was recorded, and time series analysis was performed using SPSS 21.0 software. The obtained prediction model was verified using the data from January to June in 2014. RESULTS A total of 157 cases of Enterobacter cloacae nosocomial infections were reported in the PICU between January 2010 and December 2013, including 33 cases in 2010, 35 cases in 2011, 37 cases in 2012, and 52 cases in 2013. Time series analysis of the monthly number of cases of nosocomial infections reveals a fitted curve with a clear pattern of seasonal variation (R2=0.702, Ljung-Box Q(18)=36.021, P=0.004), with peaks in May, June, and July. The verification using the data from January to June in 2014 showed small differences between the predicted values and the actual values. CONCLUSIONS In the PICU of the First Affiliated Hospital of Xinjiang Medical University, the incidence of Enterobacter cloacae nosocomial infections is high in May, June, and July every year. The prediction model is accurate and can provide a reference for infection prevention.
Collapse
Affiliation(s)
- Buli Bahati
- Department of Pediatrics, First Affiliated Hospita, Xinjiang Medical University, Urumqi 830054, China.
| | | | | |
Collapse
|
41
|
|
42
|
Mondal S, Mandal SM, Mondal TK, Sinha C. Structural characterization of new Schiff bases of sulfamethoxazole and sulfathiazole, their antibacterial activity and docking computation with DHPS protein structure. Spectrochim Acta A Mol Biomol Spectrosc 2015; 150:268-279. [PMID: 26056977 DOI: 10.1016/j.saa.2015.05.049] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [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: 03/17/2015] [Revised: 05/17/2015] [Accepted: 05/19/2015] [Indexed: 06/04/2023]
Abstract
New Schiff bases (1, 2) of substituted salicylaldehydes and sulfamethoxazole (SMX)/sulfathiazole (STZ) are synthesized and characterized by elemental analysis and spectroscopic data. Single crystal X-ray structure of one of the compounds (E)-4-((3,5-dichloro-2-hydroxybenzylidene)amino)-N-(5-methylisoxazol-3-yl)benzenesulfonamide (1c) has been determined. Antimicrobial activities of the Schiff bases and parent sulfonamides (SMX, STZ) have been examined against several Gram-positive and Gram-negative bacteria and sulfonamide resistant pathogens; the lowest MIC is observed for (E)-4-((3,5-dichloro-2-hydroxybenzylidene)amino)-N-(thiazol-2-yl)benzene sulfonamide (2c) (8.0 μg mL(-1)) and (E)-4-((3,5-dichloro-2-hydroxybenzylidene)amino)-N-(5-methylisoxazol-3-yl)benzene sulfonamide (1c) (16.0 μg mL(-1)) against sulfonamide resistant pathogens. DFT optimized structures of the Schiff bases have been used to carry out molecular docking studies with DHPS (dihydropteroate synthase) protein structure (downloaded from Protein Data Bank) using Discovery Studio 3.5 to find the most preferred binding mode of the ligand inside the protein cavity. The theoretical data have been well correlated with the experimental results. Cell viability assay and ADMET studies predict that 1c and 2c have good drug like characters.
Collapse
Affiliation(s)
- Sudipa Mondal
- Department of Chemistry, Jadavpur University, Kolkata 700 032, India
| | - Santi M Mandal
- Central Research Facility, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | | | | |
Collapse
|
43
|
Washington MA, Barnhill JC, Duff MA, Griffin J. Recovery of Bacteria and Fungi From a Leg Wound. J Spec Oper Med 2015; 15:113-116. [PMID: 26630106 DOI: 10.55460/dw1g-szng] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 12/01/2015] [Indexed: 06/05/2023]
Abstract
Acute and chronic wound infections can both be encountered in the deployed setting. These wounds are often contaminated by bacteria and fungi derived from the external environment. In this article, we present the case of a wound infection simultaneously colonized by Enterobacter cloacae (a bacterial pathogen) and Trichosporon asahii (an unusual fungal pathogen). We describe the examination and treatment of the patient and review the distinguishing characteristics of each organism.
Collapse
|
44
|
Yee BE, Carlos CA, Hata T. Crusted scabies of the scalp in a patient with systemic lupus erythematosus. Dermatol Online J 2014; 20:13030/qt9dm891gd. [PMID: 25526004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2014] [Accepted: 10/15/2014] [Indexed: 06/04/2023] Open
Abstract
BACKGROUND Crusted scabies is a severe, hyperkeratotic, psoriasiform disorder associated with immune suppression. Affected individuals typically present with crusted hyperkeratotic lesions in a variety of locations. This condition can lead to severe complications: institutional outbreaks and secondary bacterial infections associated with sepsis and high mortality. MAIN OBSERVATIONS A 37-year-old woman with a 12-year history of systemic lupus erythematosus treated with prednisone, methotrexate, and plaquenil presented with a three-week history of a painful scalp rash with adherent yellow scale. Skin biopsy and tissue culture were consistent with a diagnosis of crusted scabies with superficial bacterial infection. The patient was treated with oral ivermectin and permethrin cream, as well as ciprofloxacin for the bacterial infection. At one-week follow-up, the scalp was no longer tender and hyperkeratotic plaques had significantly improved. At one-month follow-up, the affected scalp demonstrated further improvement with decreasing erythema and alopecia with follicular ostia. CONCLUSIONS Our case highlights the atypical presentation of crusted scabies with primary scalp involvement and need for vigilance in recognizing and appropriately treating this condition to prevent the consequences of longstanding infection. Combination treatment with ivermectin and permethrin is appropriate management for this condition.
Collapse
|
45
|
Öz FN, Koca SB, Tanır G, Ciçek D, Acar M, Zorlu P. Enterobacter cloacae septicaemia complicating rotavirus gastroenteritis: a case report. East Mediterr Health J 2014; 20:514-516. [PMID: 25150360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Received: 08/14/2013] [Accepted: 04/16/2014] [Indexed: 06/03/2023]
Affiliation(s)
- F N Öz
- Department of Paediatric Infectious Diseases Dr Sami Ulus Maternity and Children's Research and Training Hospital, Ankara, Turkey
| | - S B Koca
- Department of Paediatrics, Dr Sami Ulus Maternity and Children's Research and Training Hospital, Ankara, Turkey
| | - G Tanır
- Department of Paediatric Infectious Diseases Dr Sami Ulus Maternity and Children's Research and Training Hospital, Ankara, Turkey
| | - D Ciçek
- Department of Paediatrics, Dr Sami Ulus Maternity and Children's Research and Training Hospital, Ankara, Turkey
| | - M Acar
- Department of Paediatrics, Dr Sami Ulus Maternity and Children's Research and Training Hospital, Ankara, Turkey
| | - P Zorlu
- Department of Paediatrics, Dr Sami Ulus Maternity and Children's Research and Training Hospital, Ankara, Turkey
| |
Collapse
|
46
|
Tummers-de Lind van Wijngaarden RFA. A woman with abdominal pain and swelling. Neth J Med 2014; 72:283-287. [PMID: 24930464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Affiliation(s)
- R F A Tummers-de Lind van Wijngaarden
- Departments of Internal Medicine, Maastricht University Medical Centre, Maastricht, the Netherlands, and Orbis Medical Centre, Sittard, the Netherlands
| |
Collapse
|
47
|
Füessl HS. [Fulminant infection in diabetic foot syndrome]. MMW Fortschr Med 2014; 156:34. [PMID: 24956652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
|
48
|
Porter EG, Cuddy LC, Graham AS, Reese DJ, Porter MB, Morton AJ, Lewis DD. Hinged circular fixator construct for correction of congenital metatarsal deformity in a foal. Vet Comp Orthop Traumatol 2013; 27:74-9. [PMID: 24226553 DOI: 10.3415/vcot-13-01-0007] [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: 01/11/2013] [Accepted: 10/01/2013] [Indexed: 11/17/2022]
Abstract
A five-week-old American Quarter Horse colt was presented for evaluation of a left hindlimb deformity and lameness. Radiographs of the left hindlimb revealed a varus deformity with recurvatum originating in the mid-diaphysis of the third metatarsal bone. Surgical correction was undertaken by performing an osteotomy through the centre of rotation of angulation located within the mid-diaphysis of the third metatarsal bone, and a four-ring hinged circular external fixator construct was applied. Distraction of the osteotomy site was performed over an 11 day period. Notable complications included failure of a fixation pin, infection of the surgical site, and temporary laxity of the supporting tendons and ligaments of the contralateral metatarsophalangeal joint. The fixator was maintained until there was sufficient bone formation to allow frame removal, 152 days after the initial surgery. Use of a hinged circular construct allowed for partial correction of the deformity with resultant lengthening and resolution of the lameness in this colt.
Collapse
Affiliation(s)
- E G Porter
- Erin G. Porter, DVM, DACVT, Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, 2016 SW 16th Ave, Gainesville, FL 32610, United States, Phone: +1 352 318 0633, Fax: +1 352 392 2235, E-mail:
| | | | | | | | | | | | | |
Collapse
|
49
|
Suberviola Cañas B, González Castro A, Fernández Miret B, Rubio López I, García Astudillo LA. [Procalcitonin: an allied in the management of the patient submitted to abdominal surgery]. Rev Esp Enferm Dig 2009; 101:513-514. [PMID: 19642849 DOI: 10.4321/s1130-01082009000700016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
|
50
|
Abstract
OBJECTIVE The objective of this study was to review the early clinical profiles and outcomes of very-low-birth-weight (VLBW) neonates with late-onset sepsis caused by Enterobacter cloacae. METHODS We reviewed the medical records of VLBW neonates whose blood and/or cerebral spinal fluid yielded E. cloacae after 3 days of hospitalization in our neonatal intensive care unit. RESULTS From January 1997 to December 2006, a total of 29 episodes of E. cloacae infection occurred in 28 VLBW neonates. The onset of E. cloacae infection ranged from 4 to 70 days (27.4 +/- 9.6) days after birth. The most common symptoms and signs of sepsis were desaturation (58.6%), tachycardia (58.6%), apnea (55.2%), unstable body temperature (48.3%), and decreased activity (44.8%). The infected neonates had an average of four kinds of symptoms in each sepsis episode. The most common laboratory findings in VLBW neonates with E. cloacae sepsis were thrombocytopenia (65.5%), C-reactive protein > or = 1 mg/dL (55.2%), band-form neutrophils > or = 5% (41.4%), and leucopoenia (20.7%). Empirical intravenous antibiotic therapy comprising piperacillin (or piperacillin and tazobactam) and gentamicin (or amikacin) was successful in the early treatment of 24 episodes of E. cloacae sepsis in 25 patients. Three neonates (10.7%) died due to E. cloacae sepsis. Four neonates (14.3%) developed E. cloacae meningitis, and two of them developed brain abscesses. CONCLUSIONS E. cloacae infection in VLBW neonates usually presents with nonspecific symptoms and signs. Early recognition of sepsis and empirical combination of piperacillin (or piperacillin and tazobactam) and gentamicin (or amikacin) may be useful for treatment of sepsis caused by this highly virulent pathogen.
Collapse
Affiliation(s)
- Hsiao-Neng Chen
- Department of Pediatrics, Changhua Christian Hospital, Changhua, Taiwan.
| | | | | | | | | |
Collapse
|