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Kirkik D, Kalkanli Tas S, Tanoglu A. Unraveling the blood microbiome: novel insights into inflammasome responses in Crohn's disease. Eur J Gastroenterol Hepatol 2024:00042737-990000000-00290. [PMID: 38251441 DOI: 10.1097/meg.0000000000002695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/23/2024]
Abstract
OBJECTIVE Crohn's disease (CD), an inflammatory bowel disease with unknown etiology, is influenced by genetic, environmental, and immunological factors. This study aimed to analyze the blood microbiome and inflammasome responses, emphasizing NLRP3 protein expression and IL-1β and IL-18 plasma levels, between Crohn's patients and healthy subjects. METHODS A total of 40 volunteers were included in this study. The 16S rRNA technique was used to sequence the V3-V4 regions of the blood sample. NLRP3 protein levels in plasma were ascertained through Western Blot, and IL-1β and IL-18 plasma profiles were examined using ELISA. RESULTS Analysis highlighted five unique phyla in patients' plasma, emphasizing the role of the blood microbiome in CD. Compared to controls, Crohn's patients exhibited elevated NLRP3 protein expression. Plasma IL-1β levels were diminished in patients (P = 0.0041), whereas IL-18 levels were comparably higher (P = 0.8209). In patients with CD, the presence of Staphylococcus sciuri in blood samples highlights its potential role in the disease's onset. The study also underscored the interplay between dietary habits, specifically increased meat consumption, and the progression of CD. CONCLUSION Our pioneering research discerns the variations in the blood microbiome and inflammasome responses between Crohn's patients and healthy individuals. Significant microbiome alterations and the detection of the Staphylococcus sciuri pathogen in Crohn's patients were notable. The pronounced NLRP3 protein in patients suggests its potential as a diagnostic biomarker. Future explorations into IL-1β and IL-18 pathways promise to unveil innovative insights into CD.
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Affiliation(s)
- Duygu Kirkik
- Hamidiye Medicine Faculty, Department of Medical Biology, University of Health Sciences, Turkey
| | - Sevgi Kalkanli Tas
- Hamidiye Medicine Faculty, Department of Immunology, University of Health Sciences, Turkey
| | - Alpaslan Tanoglu
- Department of Internal Medicine, Division of Gastroenterology, Bahcesehir University and School of Medicine, Istanbul, Turkey
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Ballah FM, Islam MS, Rana ML, Khatun MM, Rahman M, Hassan J, Rahman MT. Draft genome sequence of Staphylococcus gallinarum BAU_KME002 strain isolated from egg surface in Bangladesh. Microbiol Resour Announc 2023; 12:e0055523. [PMID: 37737608 PMCID: PMC10586152 DOI: 10.1128/mra.00555-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2023] [Accepted: 08/03/2023] [Indexed: 09/23/2023] Open
Abstract
This report describes the genome sequence of the Staphylococcus gallinarum BAU_KME002 strain isolated in Bangladesh in 2021 from a chicken egg surface. Our assembled genome had 50 contigs, an estimated genome length of 2,866,882 bp (with coverage of 90.0×), 36 predicted antibiotic resistance genes, and 28 predicted virulence factor genes.
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Affiliation(s)
- Fatimah Muhammad Ballah
- Department of Microbiology and Hygiene, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh, Bangladesh
| | - Md. Saiful Islam
- Department of Microbiology and Hygiene, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh, Bangladesh
| | - Md. Liton Rana
- Department of Microbiology and Hygiene, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh, Bangladesh
| | - Mst. Minara Khatun
- Department of Microbiology and Hygiene, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh, Bangladesh
| | - Marzia Rahman
- Department of Microbiology and Hygiene, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh, Bangladesh
| | - Jayedul Hassan
- Department of Microbiology and Hygiene, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh, Bangladesh
| | - Md. Tanvir Rahman
- Department of Microbiology and Hygiene, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh, Bangladesh
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Khan A, Sohail S, Yaseen S, Fatima S, Wisal A, Ahmed S, Nasir M, Irfan M, Karim A, Basharat Z, Khan Y, Aurongzeb M, Raza SK, Alshahrani MY, Morel CM, Hassan SS. Exploring and targeting potential druggable antimicrobial resistance targets ArgS, SecY, and MurA in Staphylococcus sciuri with TCM inhibitors through a subtractive genomics strategy. Funct Integr Genomics 2023; 23:254. [PMID: 37495774 DOI: 10.1007/s10142-023-01179-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 07/14/2023] [Accepted: 07/14/2023] [Indexed: 07/28/2023]
Abstract
Staphylococcus sciuri (also currently Mammaliicoccus sciuri) are anaerobic facultative and non-motile bacteria that cause significant human pathogenesis such as endocarditis, wound infections, peritonitis, UTI, and septic shock. Methicillin-resistant S. sciuri (MRSS) strains also infects animals that include healthy broilers, cattle, dogs, and pigs. The emergence of MRSS strains thereby poses a serious health threat and thrives the scientific community towards novel treatment options. Herein, we investigated the druggable genome of S. sciuri by employing subtractive genomics that resulted in seven genes/proteins where only three of them were predicted as final targets. Further mining the literature showed that the ArgS (WP_058610923), SecY (WP_058611897), and MurA (WP_058612677) are involved in the multi-drug resistance phenomenon. After constructing and verifying the 3D protein homology models, a screening process was carried out using a library of Traditional Chinese Medicine compounds (consisting of 36,043 compounds). The molecular docking and simulation studies revealed the physicochemical stability parameters of the docked TCM inhibitors in the druggable cavities of each protein target by identifying their druggability potential and maximum hydrogen bonding interactions. The simulated receptor-ligand complexes showed the conformational changes and stability index of the secondary structure elements. The root mean square deviation (RMSD) graph showed fluctuations due to structural changes in the helix-coil-helix and beta-turn-beta changes at specific points where the pattern of the RMSD and root mean square fluctuation (RMSF) (< 1.0 Å) support any major domain shifts within the structural framework of the protein-ligand complex and placement of ligand was well complemented within the binding site. The β-factor values demonstrated instability at few points while the radius of gyration for structural compactness as a time function for the 100-ns simulation of protein-ligand complexes showed favorable average values and denoted the stability of all complexes. It is assumed that such findings might facilitate researchers to robustly discover and develop effective therapeutics against S. sciuri alongside other enteric infections.
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Affiliation(s)
- Aafareen Khan
- Department of Chemistry, Islamia College Peshawar, Peshawar, 25000, KP, Pakistan
| | - Saman Sohail
- Department of Chemistry, Islamia College Peshawar, Peshawar, 25000, KP, Pakistan
| | - Seerat Yaseen
- Abbasi Shaheed Hospital, Karachi Medical and Dental College, Karachi, Pakistan
| | - Sareen Fatima
- Department of Microbiology, University of Balochistan, Quetta, Balochistan, Pakistan
| | - Ayesha Wisal
- Department of Chemistry, Islamia College Peshawar, Peshawar, 25000, KP, Pakistan
| | - Sufyan Ahmed
- Abbasi Shaheed Hospital, Karachi Medical and Dental College, Karachi, Pakistan
| | - Mahrukh Nasir
- Dr. Panjwani Center for Molecular Medicine, International Center for Chemical and Biological Sciences (ICCBS-PCMD), University of Karachi, Karachi, 75270, Pakistan
| | - Muhammad Irfan
- Dr. Panjwani Center for Molecular Medicine, International Center for Chemical and Biological Sciences (ICCBS-PCMD), University of Karachi, Karachi, 75270, Pakistan
| | - Asad Karim
- Dr. Panjwani Center for Molecular Medicine, International Center for Chemical and Biological Sciences (ICCBS-PCMD), University of Karachi, Karachi, 75270, Pakistan
| | - Zarrin Basharat
- Alpha Genomics (Private) Limited, Islamabad, 44710, Pakistan
| | - Yasmin Khan
- Dr. Panjwani Center for Molecular Medicine, International Center for Chemical and Biological Sciences (ICCBS-PCMD), University of Karachi, Karachi, 75270, Pakistan
| | - Muhammad Aurongzeb
- Faculty of Engineering Sciences & Technology, Hamdard University, Karachi, 74600, Pakistan
| | - Syed Kashif Raza
- Faculty of Rehabilitation and Allied Health Sciences (FRAHS), Riphah International University, Faisalabad, Pakistan
| | - Mohammad Y Alshahrani
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Khalid University, P.O. Box 61413, Abha, 9088, Saudi Arabia
| | - Carlos M Morel
- Centre for Technological Development in Health (CDTS), Oswaldo Cruz Foundation (Fiocruz), Building "Expansão", 8Th Floor Room 814, Av. Brasil 4036 - Manguinhos, Rio de Janeiro, RJ, 21040-361, Brazil.
| | - Syed S Hassan
- Dr. Panjwani Center for Molecular Medicine, International Center for Chemical and Biological Sciences (ICCBS-PCMD), University of Karachi, Karachi, 75270, Pakistan.
- Centre for Technological Development in Health (CDTS), Oswaldo Cruz Foundation (Fiocruz), Building "Expansão", 8Th Floor Room 814, Av. Brasil 4036 - Manguinhos, Rio de Janeiro, RJ, 21040-361, Brazil.
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Kobayashi S, Tamamura-Andoh Y, Yamane I, Kusumoto M, Katsuda K. The association between farm-level antimicrobial usage and resistance of Staphylococcus spp., as the major genus isolated from aerosol samples, in Japanese piggeries. Front Vet Sci 2023; 10:1127819. [PMID: 37565078 PMCID: PMC10411535 DOI: 10.3389/fvets.2023.1127819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Accepted: 07/10/2023] [Indexed: 08/12/2023] Open
Abstract
Bacteria are the dominant particulate matter in livestock houses and can threaten animal and public health. Antimicrobial resistance (AMR) is a crucial concern worldwide, and nationwide measures established based on the One Health approach are being implemented in many countries. This requires multidisciplinary perspectives and collaboration among the human, animal, and environmental sectors. However, information on the AMR risk in livestock house aerosol is limited, especially its association with antimicrobial usage (AMU). Therefore, this study was conducted to reveal the AMR profile of Staphylococcus, the major bacterial genus in the aerosol of the piggeries of Japanese farms, and the association between farm-level AMU and AMR. The investigation at 10 farrow-to-finish pig farms revealed that regardless of the sampling season and the piggery group, the resistance rate of isolated staphylococci for oxacillin, erythromycin, and lincomycin was more than 40% of the median and tended to be higher than that for other antimicrobials. The AMU adjusted by the defined daily dose (DDD-adjusted AMU) in the fattening piggery group was significantly higher than that in the sow piggery group (p < 0.05). Finally, for the fattening piggery group, the generalized linear mixed model revealed that the AMR rate for oxacillin, erythromycin, tetracycline, and chloramphenicol was positively associated with the corresponding class-based DDD-adjusted AMU of penicillins (odds ratio (OR) = 2.63, p = 0.03), macrolides (OR = 6.89, p = 0.0001), tetracyclines (OR = 2.48, p = 0.04), and amphenicols (OR = 3.22, p = 0.03), respectively. These significant positive associations observed in this study imply that the resistance rate for these antimicrobials may decrease by reducing the corresponding antimicrobials' use. In addition, the resistance rates for erythromycin and chloramphenicol also displayed a positive association with the AMU of antimicrobial classes other than macrolides and amphenicols, respectively. The mechanism underlying these phenomena is unclear; therefore, further evaluation will be needed. As limited studies have reported staphylococci in piggery aerosol and its AMR with quantitative AMU, these results based on on-farm investigations are expected to aid in establishing countermeasures for AMR of aerosol bacteria in pig farms.
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Affiliation(s)
- Sota Kobayashi
- Enteric Pathogen Group, Division of Zoonosis Research, National Institute of Animal Health, NARO, Tsukuba, Ibaraki, Japan
| | - Yukino Tamamura-Andoh
- Enteric Pathogen Group, Division of Zoonosis Research, National Institute of Animal Health, NARO, Tsukuba, Ibaraki, Japan
| | - Itsuro Yamane
- Enteric Pathogen Group, Division of Zoonosis Research, National Institute of Animal Health, NARO, Tsukuba, Ibaraki, Japan
| | - Masahiro Kusumoto
- Enteric Pathogen Group, Division of Zoonosis Research, National Institute of Animal Health, NARO, Tsukuba, Ibaraki, Japan
| | - Ken Katsuda
- Division of Hygiene Management Research, National Institute of Animal Health, NARO, Tsukuba, Ibaraki, Japan
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Beims H, Overmann A, Fulde M, Steinert M, Bergmann S. Isolation of Staphylococcus sciuri from horse skin infection. Open Vet J 2017; 6:242-246. [PMID: 28116248 PMCID: PMC5223282 DOI: 10.4314/ovj.v6i3.14] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Accepted: 12/07/2016] [Indexed: 11/17/2022] Open
Abstract
Staphylococcus sciuri is known as an opportunistic pathogen colonizing domesticated animals and has also been associated with wound infections in humans. Particularly over the last decade, oxacillin (methicillin) resistant strains had been emerged, which now increase the medical relevance of this species. This report describes the identification of an oxacillin-resistant S. sciuri isolate from a wound infection of a horse. We determined the absence of coagulase and hyaluronidase activity and analysed the antibiotic resistance profile.
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Affiliation(s)
- H Beims
- Department of Infection Biology, Institute of Microbiology, Technische Universität Braunschweig, Spielmannstr. 7, 38106 Braunschweig, Germany
| | - A Overmann
- Department of Infection Biology, Institute of Microbiology, Technische Universität Braunschweig, Spielmannstr. 7, 38106 Braunschweig, Germany
| | - M Fulde
- Center for Infection Medicine, Institute of Microbiology and Epizootics, Freie Universität Berlin, Berlin, Germany
| | - M Steinert
- Department of Infection Biology, Institute of Microbiology, Technische Universität Braunschweig, Spielmannstr. 7, 38106 Braunschweig, Germany
| | - S Bergmann
- Department of Infection Biology, Institute of Microbiology, Technische Universität Braunschweig, Spielmannstr. 7, 38106 Braunschweig, Germany
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Wan X, McLaughlin RW, Zhou J, Hao Y, Zheng J, Wang D. Isolation of culturable aerobic bacteria and evidence of Kerstersia gyiorum from the blowhole of captive Yangtze finless porpoises. Antonie van Leeuwenhoek 2016; 109:1167-75. [DOI: 10.1007/s10482-016-0713-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2016] [Accepted: 05/09/2016] [Indexed: 10/21/2022]
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Abera B, Kibret M. Azithromycin, fluoroquinolone and chloramphenicol resistance of non-chlamydia conjunctival bacteria in rural community of Ethiopia. Indian J Ophthalmol 2015; 62:236-9. [PMID: 23571246 PMCID: PMC4005243 DOI: 10.4103/0301-4738.99974] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Aim: To determine profiles of non-chlamydia conjunctival bacteria and their antimicrobial susceptibility from adults who underwent trachomatous trichiasis surgery in rural areas of Ethiopia. Materials and Methods: A cross-sectional study was conducted in rural districts in West Gojjam administrative zone. Conjunctival swabs were collected during surgery and transported using Stuart transport broth (Oxoid, UK). Antibiotic susceptibility of conjunctival isolates was determined using the Kirby-Bauer disc-diffusion method. Results: Non-chlamydia pathogenic bacteria were recovered from conjunctiva of 438 (31%) participants before treatment. The isolated conjunctival bacteria were Staphylococcus aureus, coagulase-negative Staphylococci, Streptococcus group (A, C, F and G), Enterococci, Streptococcus pneumoniae, Moraxella spp., Escherichia coli, Citrobacter spp., Proteus spp., Klebsiella spp., Pseudomonas spp. and Enterobacter spp. Overall, resistance rates of 57.8% to azithromycin and 68.5% to chloramphenicol were found. However, 86-94.4% sensitivity was demonstrated to ciprofloxacin and norfloxacin. Moderate sensitivity rates (61.8-78.4%) were observed to ceftriaxone, tetracycline and cotrimoxazole. Conclusion: Fluoroquinolones that have activity against the majority of bacterial isolates were potent at in vitro. However, unacceptably high levels of resistance to azithromycin and chloramphenicol in rural community indicated a need for further study and antimicrobial resistance surveillance.
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Affiliation(s)
- Bayeh Abera
- Department of Medical Microbiology, College of Medicine and Health Sciences, Ethiopia
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8
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Draft Genome Sequence of Staphylococcus gallinarum DSM 20610T, Originally Isolated from the Skin of a Chicken. GENOME ANNOUNCEMENTS 2015; 3:3/3/e00580-15. [PMID: 26044428 PMCID: PMC4457065 DOI: 10.1128/genomea.00580-15] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Staphylococcus gallinarum DSM 20610(T) is a rare pathogen in humans. The increasing relevance of human health prompted us to determine the genomic sequence of S. gallinarum. The complete genome sequence of S. gallinarum includes a genome of 3,171,720 bp (33.02% G+C content) without any plasmids.
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Nemeghaire S, Vanderhaeghen W, Argudín MA, Haesebrouck F, Butaye P. Characterization of methicillin-resistant Staphylococcus sciuri isolates from industrially raised pigs, cattle and broiler chickens. J Antimicrob Chemother 2014; 69:2928-34. [PMID: 25063778 DOI: 10.1093/jac/dku268] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
OBJECTIVES This study aimed at assessing the epidemiology and genetic diversity of methicillin-resistant Staphylococcus sciuri (MRSS) from different farm animal species. METHODS Nasal swabs were collected from 200 pigs, 100 dairy cows, 100 beef cows, 150 veal calves and 200 broilers. Colonies were isolated on selective media containing cefoxitin and the mecA gene was detected by PCR. Antimicrobial resistance was determined by broth microdilution. The genetic diversity was assessed by PFGE and resistance and virulence genes were detected by microarray analysis. RESULTS The total MRSS prevalence at the animal level was estimated at 9.5%, varying from ∼10% in veal (13.3%), broilers (12.5%) and dairy cows (10.0%) to 6.5% in pigs and 3.0% in beef cows. mecA was detected in all isolates. SCCmec elements of type III and non-typeable ones were seen most frequently. More than 90% of isolates were non-wild-type (NWT) for gentamicin, penicillin, tiamulin, clindamycin and quinupristin/dalfopristin. The frequency of NWT isolates for fusidic acid and trimethoprim ranged between 78% and 87%. PFGE analysis allowed distinction between two major clusters. Most isolates tested by microarray carried erm and tet genes. Virulence genes were also detected, including an isa gene encoding an immune-evasion factor and the hsdS2 gene encoding a site-specific deoxyribonuclease. CONCLUSIONS This study shows that multiresistant MRSS is carried by different farm animal species. Although some animals shared the same strain, PFGE showed different patterns, indicating high diversity among the MRSS isolates recovered. The absence of clusters associated with a certain animal species suggests low host specificity.
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Affiliation(s)
- Stéphanie Nemeghaire
- Department of General Bacteriology, Veterinary and Agrochemical Research Centre, Groeselenbergstraat 99, B-1180 Ukkel, Belgium Department of Pathology, Bacteriology and Avian Diseases, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium
| | - Wannes Vanderhaeghen
- Department of Reproduction, Obstetrics and Herd Health, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium
| | - M Angeles Argudín
- Department of General Bacteriology, Veterinary and Agrochemical Research Centre, Groeselenbergstraat 99, B-1180 Ukkel, Belgium
| | - Freddy Haesebrouck
- Department of Reproduction, Obstetrics and Herd Health, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium
| | - Patrick Butaye
- Department of General Bacteriology, Veterinary and Agrochemical Research Centre, Groeselenbergstraat 99, B-1180 Ukkel, Belgium Department of Pathology, Bacteriology and Avian Diseases, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium
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Molecular epidemiology of methicillin-resistant Staphylococcus sciuri in healthy chickens. Vet Microbiol 2014; 171:357-63. [DOI: 10.1016/j.vetmic.2014.01.041] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2013] [Revised: 01/29/2014] [Accepted: 01/31/2014] [Indexed: 11/19/2022]
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The ecological importance of the Staphylococcus sciuri species group as a reservoir for resistance and virulence genes. Vet Microbiol 2014; 171:342-56. [DOI: 10.1016/j.vetmic.2014.02.005] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2013] [Revised: 01/30/2014] [Accepted: 02/01/2014] [Indexed: 11/18/2022]
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Tibra NK, Jalali S, Reddy AK, Narayanan R, Agarwal R. Traumatic endophthalmitis caused by Staphylococcus gallinarum. J Med Microbiol 2009; 59:365-366. [PMID: 19910485 DOI: 10.1099/jmm.0.011551-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Herein, we describe what we believe to be the first case of traumatic endophthalmitis caused by Staphylococcus gallinarum, following injury with an iron nail. The patient was successfully treated by vitrectomy and intravitreal injection of cefazolin and vancomycin.
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Affiliation(s)
- Nand Kishore Tibra
- Smt Kanuri Santhamma Retina Vitreous Centre, L V Prasad Eye Institute, Hyderabad, India
| | - Subhadra Jalali
- Smt Kanuri Santhamma Retina Vitreous Centre, L V Prasad Eye Institute, Hyderabad, India
| | - Ashok Kumar Reddy
- Jhaveri Microbiology Centre, Hyderabad Eye Research Foundation, L V Prasad Eye Institute, Hyderabad, India
| | - Raja Narayanan
- Smt Kanuri Santhamma Retina Vitreous Centre, L V Prasad Eye Institute, Hyderabad, India
| | - Rupesh Agarwal
- Smt Kanuri Santhamma Retina Vitreous Centre, L V Prasad Eye Institute, Hyderabad, India
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Dhanarani TS, Shankar C, Park J, Dexilin M, Kumar RR, Thamaraiselvi K. Study on acquisition of bacterial antibiotic resistance determinants in poultry litter. Poult Sci 2009; 88:1381-7. [PMID: 19531707 DOI: 10.3382/ps.2008-00327] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Antibiotic resistance and the mode of transmission were investigated in bacteria isolated from poultry litter. Total aerobic heterotrophic bacteria were screened and identified for their resistance to different antibiotics such as ampicillin, streptomycin, erythromycin, tetracycline, chloramphenicol, kanamycin, tobramycin, and rifampicin. The distribution of bacteria found in the litter was Staphylococcus (29.1%), which was the predominant group, followed by Streptococcus (25%), Micrococcus (20.8%), Escherichia coli (12.5%), Salmonella (8.3%), and Aeromonas (4.1%). Fifty percent of these isolates were susceptible to ampicillin, 57% to erythromycin, 25% to tetracycline, 4% to chloramphenicol, 40% to kanamycin, 75% to streptomycin, 54% to tobramycin, and 4% to rifampicin. Three randomly selected isolates representing Staphylococcus, Streptococcus, and Micrococcus were examined for plasmids, and plasmid-curing and plasmid-induced transformation studies were conducted. Streptococcus and Micrococcus harbored a plasmid of 4.2 and 5.1 kb, respectively, whereas Staphylococcus did not harbor any plasmids. Plasmids were cured in Streptococcus and Micrococcus at a concentration of 75 and 100 microg/ mL of acridine orange, respectively, and transformation of 4.2- and 5.1-kb plasmids isolated from the Streptococcus and Micrococcus to plasmid-free E. coli DH5alpha strain was possible. In conjugation experiments, the antibiotic resistance profiles of transconjugant cells were found to be the same as the donors with the exception of Staphylococcus. The results of this study suggest that transformation and conjugation could be an important mechanism for horizontal gene transfer between bacteria in poultry litter. An understanding of the mechanism and magnitude of resistance gene transfer may provide a strategy to reduce the potential for dissemination of these genes.
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Affiliation(s)
- T Sridevi Dhanarani
- Department of Environmental Biotechnology, Bharathidasan University, Tiruchirappalli, 620 024, India
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Okeke IN, Laxminarayan R, Bhutta ZA, Duse AG, Jenkins P, O'Brien TF, Pablos-Mendez A, Klugman KP. Antimicrobial resistance in developing countries. Part I: recent trends and current status. THE LANCET. INFECTIOUS DISEASES 2005; 5:481-93. [PMID: 16048717 DOI: 10.1016/s1473-3099(05)70189-4] [Citation(s) in RCA: 439] [Impact Index Per Article: 23.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The global problem of antimicrobial resistance is particularly pressing in developing countries, where the infectious disease burden is high and cost constraints prevent the widespread application of newer, more expensive agents. Gastrointestinal, respiratory, sexually transmitted, and nosocomial infections are leading causes of disease and death in the developing world, and management of all these conditions has been critically compromised by the appearance and rapid spread of resistance. In this first part of the review, we have summarised the present state of resistance in these infections from the available data. Even though surveillance of resistance in many developing countries is suboptimal, the general picture is one of accelerating rates of resistance spurred by antimicrobial misuse and shortfalls in infection control and public health. Reservoirs for resistance may be present in healthy human and animal populations. Considerable economic and health burdens emanate from bacterial resistance, and research is needed to accurately quantify the problem and propose and evaluate practicable solutions. In part II, to be published next month, we will review potential containment strategies that could address this burgeoning problem.
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Affiliation(s)
- Iruka N Okeke
- Department of Biology, Haverford College, Haverford, PA, USA
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Dakić I, Morrison D, Vuković D, Savić B, Shittu A, Jezek P, Hauschild T, Stepanović S. Isolation and molecular characterization of Staphylococcus sciuri in the hospital environment. J Clin Microbiol 2005; 43:2782-5. [PMID: 15956397 PMCID: PMC1151920 DOI: 10.1128/jcm.43.6.2782-2785.2005] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2004] [Revised: 12/04/2004] [Accepted: 02/27/2005] [Indexed: 11/20/2022] Open
Abstract
Staphylococcus sciuri is a principally animal-associated bacterial species, but its clinical relevance for humans is increasing. Our study aimed to provide the first insight into the prevalence of this bacterium in a hospital environment. A 3-month surveillance was conducted in a hospital located in Belgrade, Serbia, and 1,028 samples taken from hands of medical personnel, medical devices, and various hospital surfaces were screened for S. sciuri presence. In total, 108 isolates were obtained, which resulted in a relatively high rate of colonization (10.5%). These isolates, along with 7 S. sciuri strains previously isolated in the same hospital (n = 115), were phenotypically and genotypically characterized. Antimicrobial susceptibility testing revealed that 73% of the strains were resistant to one or more antibiotics, with 4.3% strains displaying multiresistance. Examination of 16S-23S ribosomal DNA intergenic spacer length polymorphism identified the strains at the subspecies level, and 74 (64.3%) strains of S. sciuri subsp. sciuri, 37 (32.2%) strains of S. sciuri subsp. rodentium, and 4 (3.5%) strains of S. sciuri subsp. carnaticus were established. Pulsed-field gel electrophoresis (PFGE) analysis showed 21 distinct pulsotypes, including 17 main types and 4 subtypes. One dominant cluster with 62 strains was found, while 19 (90.5%) of the PFGE types and subtypes identified had 5 or fewer strains. The predominance of small PFGE clusters suggests that the ubiquitous presence of S. sciuri in the outside environment presents the continuous source for colonization of the hospital environment. The presence of one dominant PFGE cluster of strains indicates that some S. sciuri strains may be capable for adaptation to hospital environment conditions and continuous existence in this environment.
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Affiliation(s)
- Ivana Dakić
- Department of Bacteriology, Institute of Microbiology and Immunology, School of Medicine, Dr. Subotića 1, 11000 Belgrade, Serbia
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Stanley VG, Gray C, Daley M, Krueger WF, Sefton AE. An Alternative to Antibiotic-Based Drugs in Feed for Enhancing Performance of Broilers Grown on Eimeria Spp.-Infected Litter. Poult Sci 2004; 83:39-44. [PMID: 14761082 DOI: 10.1093/ps/83.1.39] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Three trials were conducted to evaluate the effects of lasalocid, an anticoccidial feed additive (90.7 kg/ton); bacitracin, a growth-promoter (50 g/ton); and yeast culture residue (YCR) (1 kg/ton) on the performance of broiler chicks reared to 42 d of age on recycled litter. Recycled litter consisted of pine wood shavings containing droppings from chicks infected with 3 select strains of coccidia (Eimeria tenella, Eimeria maxima, and Eimeria acervulina). Response variables (BW, intestinal tract and litter coliform counts, cecal and liver relative weights, and litter moisture content) were recorded biweekly. Mean BW of chicks fed the diet supplemented with YCR was higher than that of the controls (P < 0.05) and comparable to that of the lasalocid-treated birds in all 3 trials. Mean BW of chicks in all treatment groups decreased uniformly as the litter aged and moisture content increased. The mean intestinal coliform population from YCR-treated chicks was lower (P < 0.05) than those of the control and lasalocid populations. The coliform count was consistently lower than that in chicks on a bacitracin-supplemented diet. Coliform counts from the control and lasalocid-treated birds did not differ. The litter coliform counts increased with increased use of the litter. Cecal and liver relative weights calculated from the chicks in trial 3 showed that only the liver was significantly affected by treatments. YCR appeared to be a viable alternative to bacitracin and lasalocid medication in enhancing growth of broiler chicks reared on recycled litter.
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Affiliation(s)
- V G Stanley
- Cooperative Agricultural Research Center, Prairie View A&M University, Prairie View, Texas 77446, USA.
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Shittu A, Lin J, Morrison D, Kolawole D. Isolation and molecular characterization of multiresistant Staphylococcus sciuri and Staphylococcus haemolyticus associated with skin and soft-tissue infections. J Med Microbiol 2004; 53:51-55. [PMID: 14663105 DOI: 10.1099/jmm.0.05294-0] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The isolation, molecular identification and genotyping of multiresistant Staphylococcus sciuri and Staphylococcus haemolyticus from skin and soft-tissue infections are reported. Accurate and full identification of three coagulase-negative staphylococcal isolates was achieved using PCR, while the API STAPH method failed to identify an isolate of S. haemolyticus fully. The PCR assay, which detects polymorphism in the 16S-23S rRNA spacer region, is shown to be potentially useful for rapid and accurate identification of coagulase-negative staphylococci. Identical PFGE type and antibiotic-resistance profiles of two methicillin-resistant S. haemolyticus isolates in this study suggest the existence of a multiresistant community clone.
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Affiliation(s)
- Adebayo Shittu
- School of Biochemistry and Microbiology, University of Durban-Westville, Durban 4000, Republic of South Africa 2Scottish MRSA Reference Laboratory, Microbiology Department, Stobhill Hospital, Glasgow G21 3UW, UK 3Department of Microbiology, Obafemi Awolowo University, Ile-Ife, Nigeria
| | - Johnson Lin
- School of Biochemistry and Microbiology, University of Durban-Westville, Durban 4000, Republic of South Africa 2Scottish MRSA Reference Laboratory, Microbiology Department, Stobhill Hospital, Glasgow G21 3UW, UK 3Department of Microbiology, Obafemi Awolowo University, Ile-Ife, Nigeria
| | - Donald Morrison
- School of Biochemistry and Microbiology, University of Durban-Westville, Durban 4000, Republic of South Africa 2Scottish MRSA Reference Laboratory, Microbiology Department, Stobhill Hospital, Glasgow G21 3UW, UK 3Department of Microbiology, Obafemi Awolowo University, Ile-Ife, Nigeria
| | - Deboye Kolawole
- School of Biochemistry and Microbiology, University of Durban-Westville, Durban 4000, Republic of South Africa 2Scottish MRSA Reference Laboratory, Microbiology Department, Stobhill Hospital, Glasgow G21 3UW, UK 3Department of Microbiology, Obafemi Awolowo University, Ile-Ife, Nigeria
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Hauschild T, Schwarz S. Differentiation of Staphylococcus sciuri strains isolated from free-living rodents and insectivores. JOURNAL OF VETERINARY MEDICINE. B, INFECTIOUS DISEASES AND VETERINARY PUBLIC HEALTH 2003; 50:241-6. [PMID: 12864900 DOI: 10.1046/j.1439-0450.2003.00662.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Twenty-nine Staphylococcus sciuri strains isolated from free-living insectivores and rodents were comparatively analysed for their biochemical capacities and their SmaI macrorestriction patterns. The 29 S. sciuri isolates represented 21 different biotypes and 22 different SmaI macrorestriction types. This observation confirmed that S. sciuri isolates obtained from insectivores and rodents living in natural environments constituted a heterogeneous population. Cluster analysis revealed that the macrorestriction patterns and the biochemical profiles matched in some cases. However, S. sciuri isolates that exhibited the same or closely related biochemical profiles were also found to be associated with different macrorestriction patterns. Analysis of the 29 S. sciuri isolates for their plasmid content and their sensitivity to antimicrobial agents showed that most of the isolates were plasmid-free and susceptible to all antimicrobial agents tested.
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Affiliation(s)
- T Hauschild
- University of Bialystok, Institute of Biology, Department of Microbiology, 15-950 Bialystok, Swierkowa 20b, Poland.
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Stepanović S, Dakić I, Djukić S, Lozuk B, Svabić-Vlahović M. Surgical wound infection associated with Staphylococcus sciuri. SCANDINAVIAN JOURNAL OF INFECTIOUS DISEASES 2003; 34:685-6. [PMID: 12374362 DOI: 10.1080/00365540110076949a] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
We describe a case of surgical wound infection due to Staphylococcus sciuri. The isolated strain was susceptible to trimethoprim-sulfamethoxazole, erythromycin, chloramphenicol, ciprofloxacin and vancomycin and resistant to gentamicin, clindamycin, rifampicin, methicillin, ampicillin and ceftriaxone. The multiresistance of the strain had a serious impact on the prolonged course of the infection. Although this bacterium is principally found in animals, our strain was probably of nosocomial origin.
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Affiliation(s)
- Srdjan Stepanović
- School of Medicine, Institute of Microbiology and Immunology, University of Belgrade, Serbia.
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Couto I, Wu SW, Tomasz A, de Lencastre H. Development of methicillin resistance in clinical isolates of Staphylococcus sciuri by transcriptional activation of the mecA homologue native to s. J Bacteriol 2003; 185:645-53. [PMID: 12511511 PMCID: PMC145312 DOI: 10.1128/jb.185.2.645-653.2003] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2002] [Accepted: 10/07/2002] [Indexed: 11/20/2022] Open
Abstract
The beta-lactam resistance gene mecA was acquired by Staphylococcus aureus from an extraspecies source. The search for the possible origin of this gene has led to the identification of a close structural homologue of mecA as a native gene in the animal species Staphylococcus sciuri. Surprisingly, the overwhelming majority of S. sciuri isolates were fully susceptible to beta-lactam antibiotics in spite of the ubiquitous presence of the mecA homologue in the bacteria. We now describe two unusual S. sciuri strains isolated from humans-SS-37 and SS-41-that showed resistance to methicillin associated with high rates of transcription of the mecA homologue and production of a protein resembling penicillin binding protein 2a, the gene product of S. aureus mecA. In strain SS-37 increased transcription of the mecA homologue was related to insertion of an IS256 element upstream of the structural gene, and strain SS-41 had single nucleotide alterations in the promoter region of the mecA homologue which appear to be related to up-regulation of the rate of transcription. A third methicillin-resistant human isolate of S. sciuri that carries both the native mecA homologue and a methicillin-resistant S. aureus (MRSA) type mecA, strain K3, was now shown to be unstable in the absence of drug selection, causing the segregation of antibiotic-susceptible cells accompanied by the loss of the MRSA type mecA. These observations illustrate the remarkable variety of strategies available to bacteria for acquiring mechanisms of drug resistance in the in vivo environment.
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Affiliation(s)
- Isabel Couto
- Molecular Genetics Unit, Instituto de Tecnologia Química e Biológica da Universidade Nova de Lisboa, 2780-156 Oeiras, Portugal
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Stepanović S, Dimitrijević V, Vuković D, Dakić I, Savić B, Svabic-Vlahović M. Staphylococcus sciuri as a part of skin, nasal and oral flora in healthy dogs. Vet Microbiol 2001; 82:177-85. [PMID: 11423208 DOI: 10.1016/s0378-1135(01)00377-7] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The coagulase-negative species Staphylococcus sciuri is widespread in nature and is associated with a variety of domestic and wild animals. However, the occurrence of S. sciuri in dogs has received little attention so far. In the present study, we established the prevalence of S. sciuri in a large population of healthy dogs, and characterized isolated strains. Samples from two mucous membrane sites (anterior nares and mouth), and two hair-coated sites (head and withers) were taken from 122 dogs and inoculated into STS agar, a novel selective medium that was introduced and tested in the study. In total, 116 isolates of S. sciuri were obtained from 488 specimens. S. sciuri was isolated from 56 out of 122 (46%) dogs. The occurrence of S. sciuri in the anterior nares and mouth were significantly higher than those in withers and head. No significant association of S. sciuri occurrence in dogs and factors such as sex, age, and living environment (indoor/outdoor) was found. Out of 56 dogs, which tested positive for S. sciuri, 30 (54%) would have it as a resident flora. Thus, we showed that S. sciuri was frequently present as a part of skin, nasal and oral flora in healthy dogs both as a resident and transient carriage.
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Affiliation(s)
- S Stepanović
- Department of Bacteriology, Institute of Microbiology and Immunology, School of Medicine, University of Belgrade, Dr. Subotića 1, 11000 Belgrade, Yugoslavia.
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Stepanović S, Vukovicć D, Trajković V, Samardzić T, Cupić M, Svabić-Vlahović M. Possible virulence factors of Staphylococcus sciuri. FEMS Microbiol Lett 2001; 199:47-53. [PMID: 11356566 DOI: 10.1111/j.1574-6968.2001.tb10649.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Staphylococcus sciuri is an opportunistic pathogen of controversial clinical significance. The factors that contribute to colonization and/or infection caused by this bacterium have not been studied intensively so far. The present research was carried out in order to study the presence of potential virulence factors in 121 human and animal isolates of this bacterium. Isolates were examined for biofilm formation, hemagglutination, presence of clumping factor, production of spreading factors and exotoxins, cytotoxicity and capacity to stimulate nitric oxide production. The results showed that S. sciuri is highly capable of biofilm production, that it displays strong proteolytic and DNase activities, produces hemolysins and stimulates nitric oxide production by rat macrophages. Although the present study showed existence of a wide spectrum of possible virulence determinants of S. sciuri, their exact contribution to virulence of this bacterium in vivo remains to be determined.
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Affiliation(s)
- S Stepanović
- Institute of Microbiology and Immunology, School of Medicine, University of Belgrade, Yugoslavia.
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Couto I, Sanches IS, Sá-Leão R, de Lencastre H. Molecular characterization of Staphylococcus sciuri strains isolated from humans. J Clin Microbiol 2000; 38:1136-43. [PMID: 10699009 PMCID: PMC86357 DOI: 10.1128/jcm.38.3.1136-1143.2000] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
We previously characterized over 100 Staphylococcus sciuri isolates, mainly of animal origin, and found that they all carried a genetic element (S. sciuri mecA) closely related to the mecA gene of methicillin-resistant Staphylococcus aureus (MRSA) strains. We also found a few isolates that carried a second copy of the gene, identical to MRSA mecA. In this work, we analyzed a collection of 28 S. sciuri strains isolated from both healthy and hospitalized individuals. This was a relatively heterogeneous group, as inferred from the different sources, places, and dates of isolation and as confirmed by pulsed-field gel electrophoresis analysis. All strains carried the S. sciuri mecA copy, sustaining our previous proposal that this element belongs to the genetic background of S. sciuri. Moreover, 46% of the strains also carried the MRSA mecA copy. Only these strains showed significant levels of resistance to beta-lactams. Strikingly, the majority of the strains carrying the additional MRSA mecA copy were obtained from healthy individuals in an antibiotic-free environment. Most of the 28 strains were resistant to penicillin, intermediately resistant to clindamycin, and susceptible to tetracycline, erythromycin, and gentamicin. Resistance to these last three antibiotics was found in some strains only. The findings reported in this work confirmed the role of S. sciuri in the evolution of the mechanism of resistance to methicillin in staphylococci and suggested that this species (like the pathogenic staphylococci) may accumulate resistance markers for several classes of antibiotics.
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Affiliation(s)
- I Couto
- Molecular Genetics Unit, Instituto de Tecnologia Química e Biológica da Universidade Nova de Lisboa (ITQB/UNL), 2781-156 Oeiras, Portugal
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Marsou R, Bes M, Boudouma M, Brun Y, Meugnier H, Freney J, Vandenesch F, Etienne J. Distribution of Staphylococcus sciuri subspecies among human clinical specimens, and profile of antibiotic resistance. Res Microbiol 1999; 150:531-41. [PMID: 10577486 DOI: 10.1016/s0923-2508(99)00104-7] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The distribution of three subspecies comprising Staphylococcus sciuri was determined for a collection of 30 clinical isolates originating from Morocco, the United Kingdom, and France. The sources of these isolates were principally wounds, skin, and soft tissue infections. At the species level, the isolates were identified according to biochemical characteristics and at the subspecies level by the ribotyping technique. PCR analysis performed with the 16S-23S ribosomal DNA intergenic spacer was less powerful for subspecies differentiation. S. sciuri subsp. sciuri was the most frequent subspecies (21 isolates) found in the collection, whereas S. sciuri subsp. rodentium (seven isolates) and S. sciuri subsp. carnaticus (two isolates) were less common. mecA or a mecA-related gene was detected by PCR and Southern blot in all 30 S. sciuri isolates, supporting the suggestion that S. sciuri species are the natural reservoir of the mecA gene. While the linA/linA' gene coding for lincomycin resistance was present in five isolates, an uncharacterized gene for this resistance was suspected in seventeen other isolates.
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MESH Headings
- Bacterial Typing Techniques
- Blotting, Southern
- Colony Count, Microbial
- DNA, Bacterial/analysis
- DNA, Bacterial/genetics
- DNA, Ribosomal/analysis
- DNA, Ribosomal/genetics
- Drug Resistance, Microbial
- France
- Humans
- Lincomycin/pharmacology
- Methicillin Resistance
- Morocco
- Polymerase Chain Reaction
- Polymorphism, Restriction Fragment Length
- RNA, Ribosomal, 16S/analysis
- RNA, Ribosomal, 16S/genetics
- Staphylococcus/classification
- Staphylococcus/drug effects
- Staphylococcus/genetics
- Staphylococcus/isolation & purification
- United Kingdom
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Affiliation(s)
- R Marsou
- Centre national de référence des Toxémies à Staphylocoques, EA 1655, faculté de médecine, Lyon, France
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Kelley TR, Pancorbo OC, Merka WC, Barnhart HM. Antibiotic resistance of bacterial litter isolates. Poult Sci 1998; 77:243-7. [PMID: 9495488 DOI: 10.1093/ps/77.2.243] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Use of antibiotics in subtherapeutic doses as growth-promoting feed additives for animal production is widespread in the U.S. and throughout the world. Previous studies by our research group concluded that size fractionation of poultry (broiler) litter followed by storage facilitated reutilization of litter as a soil amendment or bedding supplement. However, litter microbial contamination, including antibiotic-resistant populations, and accumulation of metals and other elements may limit litter reutilization. Litter from four broiler houses was separated into a fine fraction for use as a soil amendment, and a coarse fraction for reutilization as a bedding supplement in growing subsequent flocks of broilers. Fractions and whole litter were stored in indoor piles simulating farm storage conditions for 4 mo with periodic analysis for metals, other elements, and culturable bacteria (including total and fecal coliform, Aeromonas hydrophila, Pseudomonas aeruginosa, Yersinia enterocolitica, and Campylobacter jejuni). Representative bacterial isolates were tested for their sensitivity to 12 common antibiotics (ampicillin, bacitracin, cephalothin, erythromycin, gentamicin, kanamycin, nalidixic acid, neomycin, penicillin, streptomycin, sulfisoxazole, and tetracycline) using the Kirby-Bauer technique. Pathogens and indicator bacteria tested were found to be resistant to multiple antibiotics. Data suggest that microbial contamination of litter should be reduced or eliminated prior to reutilization to minimize environmental health risks related to transfer of antibiotic-resistant bacteria to humans or other animals.
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Affiliation(s)
- T R Kelley
- Department of Health Sciences, Illinois State University, Normal 61790-5220, USA.
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