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Souza TGVD, Santana JA, Claudino MMS, Pereira ST, Xavier RGC, do Amarante VS, de Castro YG, Dorneles EMS, Aburjaile FF, de Carvalho VA, Brenig B, Silva ROS. Occurrence, genetic diversity, and antimicrobial resistance of methicillin-resistant Staphylococcus spp. in hospitalized and non-hospitalized cats in Brazil. PLoS One 2024; 19:e0309711. [PMID: 39361625 PMCID: PMC11449366 DOI: 10.1371/journal.pone.0309711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2024] [Accepted: 08/16/2024] [Indexed: 10/05/2024] Open
Abstract
Methicillin-resistant Staphylococci (MRS) cause infections at various sites and exhibit multidrug resistance. Despite their importance in veterinary medicine, only little is known about Staphylococcus spp. colonizing and infecting cats. Therefore, in this study, we aimed to isolate and identify Staphylococcus spp. colonizing hospitalized and non-hospitalized domestic cats and analyze their antimicrobial resistance profiles, genetic diversity, and risk factors associated with MRS colonization. A total of 218 oral and axillary swabs were obtained from 109 cats, including 77 non-hospitalized and 32 hospitalized cats. After plating on selective media, the isolates were identified via matrix-assisted laser desorption/ionization time-of-flight mass spectrometry and rpoB and 16S rRNA gene sequencing. Subsequently, antimicrobial sensitivity of the strains was assessed, and they were screened for mecA gene. Methicillin-resistant S. haemolyticus (MRSH) isolates were subjected to multilocus sequence typing, whereas methicillin-resistant S. pseudintermedius (MRSP) and S. felis isolates were subjected to whole genome sequencing. S. felis was most commonly isolated from non-hospitalized cats (28.1%), whereas S. pseudintermedius and MRS were commonly isolated from hospitalized cats (25%). MRSH isolates from hospitalized animals were classified as ST3. The identified MRSP strains belonged to two well-known sequence types, ST551 and ST71. Moreover, antimicrobial use (p = 0.0001), hospitalization (p = 0.0141), and comorbidities (p = 0.002) were associated with increased MRS prevalence in cats.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - Bertram Brenig
- Institute of Veterinary Medicine, University of Göttingen, Göttingen, Germany
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Coagulase-Negative Staphylococci Clones Are Widely Distributed in the Hospital and Community. Pathogens 2021; 10:pathogens10070792. [PMID: 34201417 PMCID: PMC8308670 DOI: 10.3390/pathogens10070792] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 05/12/2021] [Accepted: 05/14/2021] [Indexed: 11/29/2022] Open
Abstract
Coagulase-negative staphylococci (CoNS) may be considered contaminants when isolated from clinical specimens but may also be a cause of true infection. This study aimed to compare the clonality and SCCmec type of a collection of CoNS isolated from blood cultures of inpatients, nasal swabs of healthy individuals, and patients with chronic wounds, all from the same community, using SCCmec typing, pulsed-field gel electrophoresis (PFGE), and MLST. Staphylococcus epidermidis, exhibited high clonal diversity, but hospital and community clusters were observed. Nosocomial S. epidermidis clones belonged to sequence types ST2, ST6, and ST23. Some Staphylococcus haemolyticus clones were found to circulate in the hospital and community, while Staphylococcus saprophyticus exhibited very high clonal diversity. Staphylococcus lugdunensis, Staphylococcus warneri, and Staphylococcus capitis revealed several isolates belonging to the same clone in the hospital and community. The detection of different SCCmec types within the same cluster indicated high diversity. S. epidermidis was associated with SCCmec I and III, S. haemolyticus with I and II, S. capitis with type V, Staphylococcus hominis with mec complex type A and ccr1, and S. warneri and S. saprophyticus with SCCmec I. The generation of elements and new combinations of cassette genes were highly associated with CoNS isolates, suggesting that SCCmec may not be a good marker of clonality in these bacteria.
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Seliem WA, Sultan AM. Etiology of early onset neonatal sepsis in neonatal intensive care unit - Mansoura, Egypt. J Neonatal Perinatal Med 2019; 11:323-330. [PMID: 30149469 DOI: 10.3233/npm-17128] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
INTRODUCTION This study was conducted to find out the bacterial causes of early onset neonatal sepsis and their susceptibility pattern for different classes of antibiotics in neonates admitted to neonatal intensive care unit (NICU) of Mansoura-Egypt. METHODS A descriptive cross-sectional study was conducted. All admitted newborns to our study were infants at <72 hours of age with clinical features of sepsis or product of an in-house delivery at Mansoura University Hospital with risk factors for neonatal sepsis. Identification of Gram-negative isolates was confirmed by API 20E kits (bioMerieux). Antibiotic susceptibility was performed by Kirby-Bauer disc diffusion method. Bacteria resistant to ≥3 antimicrobial classes were counted as multidrug resistant. RESULTS One hundred eighty eight babies were admitted to our study. Positive blood culture was reported in 34.6% of newborn infants with prevalence of 4.02/1,000 live births. The most common isolated bacteria in early onset neonatal sepsis were coagulase negative staphylococci followed by Klebsiella pneumoniae and Serratia marcescens. The Gram-positive bacteria showed high resistance to ampicillin 93.9% while all the isolates were susceptible to vancomycin. The isolated Gram-negative bacteria were highly resistant to ampicillin [96.9%], amoxicillin-clavulanic acid [90.6%], cefotaxime [84.4%] and ceftazidime [84.4%]. Best sensitivity among all isolates was observed to imipenem. Multidrug resistance was observed among 45.5% of the Gram-positive and 68.8% of Gram-negative isolates. CONCLUSION Appropriate identification of the source of infection and initiation of an effective management can reduce both mortality and morbidity associated with neonatal sepsis. The challenge is to initiate immediate empirical antibiotic therapy according to a strictly implemented updated antibiotic policy based on an individualized community established antimicrobial sensitivity pattern of microorganisms causing early onset neonatal sepsis.
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Affiliation(s)
- W A Seliem
- Faculty of Medicine, Mansoura University, Mansoura, Egypt.,Department of Pediatrics, Mansoura University, Mansoura, Egypt
| | - A M Sultan
- Faculty of Medicine, Mansoura University, Mansoura, Egypt.,Department of Immunology and Medical Microbiology, Mansoura University, Mansoura, Egypt
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Pinheiro L, Mello PL, Abraão LM, Corrente JE, Lourdes Rs Cunha MD. Evaluation of reference values for phenotypic tests to detect oxacillin resistance in coagulase-negative staphylococci. Future Microbiol 2018. [PMID: 29521121 DOI: 10.2217/fmb-2017-0221] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
AIM To evaluate the adequacy of the disc-diffusion test and E-test® compared with detection of mecA for coagulase-negative staphylococci isolated from blood cultures, nasal swabs and wounds. RESULTS Agreement between all techniques was observed in 65.7% of cases. The greatest discrepancy between mecA/susceptible E-test was observed for non-epidermidis species. A resistance breakpoint ≤19 mm using the oxacillin disc was found to best classify all coagulase-negative staphylococci isolates; Staphylococcus epidermidis, ≤19 mm (oxacillin) and ≤27 mm (cefoxitin); Staphylococcus haemolyticus and Staphylococcus capitis, ≤21 mm (oxacillin) and ≤18 mm (cefoxitin); Staphylococcus warneri, MICs ≥0.75 mg/l. CONCLUSION Although no longer recommended by the Clinical Laboratory Standards Institute, we observed some cases in which only the oxacillin disc-diffusion test detected resistance. The discrepancy between phenotypic tests and mecA is probably due to heterogeneity and borderline resistance.
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Affiliation(s)
- Luiza Pinheiro
- Department of Microbiology & Immunology, Institute of Biosciences of Botucatu, Universidade Estadual Paulista - UNESP, Botucatu 18618-970, Brazil.,Departament of Anatomic Pathology, Instituto Lauro de Souza Lima, Bauru 17034-971, Brazil
| | - Priscila L Mello
- Department of Microbiology & Immunology, Institute of Biosciences of Botucatu, Universidade Estadual Paulista - UNESP, Botucatu 18618-970, Brazil
| | - Ligia M Abraão
- Department of Microbiology & Immunology, Institute of Biosciences of Botucatu, Universidade Estadual Paulista - UNESP, Botucatu 18618-970, Brazil
| | - José Eduardo Corrente
- Department of Biostatistics, Institute of Biosciences of Botucatu, Universidade Estadual Paulista - UNESP, Botucatu 18618-970, Brazil
| | - Maria de Lourdes Rs Cunha
- Department of Microbiology & Immunology, Institute of Biosciences of Botucatu, Universidade Estadual Paulista - UNESP, Botucatu 18618-970, Brazil
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Seng R, Kitti T, Thummeepak R, Kongthai P, Leungtongkam U, Wannalerdsakun S, Sitthisak S. Biofilm formation of methicillin-resistant coagulase negative staphylococci (MR-CoNS) isolated from community and hospital environments. PLoS One 2017; 12:e0184172. [PMID: 28859149 PMCID: PMC5578677 DOI: 10.1371/journal.pone.0184172] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Accepted: 08/15/2017] [Indexed: 01/31/2023] Open
Abstract
Methicillin-resistant coagulase negative staphylococci (MR-CoNS) are the major cause of infectious diseases because of their potential ability to form biofilm and colonize the community or hospital environments. This study was designed to investigate the biofilm producing ability, and the presence of mecA, icaAD, bap and fnbA genes in MR-CoNS isolates. The MR-CoNS used in this study were isolated from various samples of community environment and five wards of hospital environments, using mannitol salt agar (MSA) supplemented with 4 μg/ml of oxacillin. The specie level of Staphylococcus haemolyticus, Staphylococcus epidermidis, Staphylococcus hominis and Staphylococcus warneri was identified by specific primers of groESL (S. haemolyticus), rdr (S. epidermidis) and nuc (S. hominis and S. warneri). The remainder isolates were identified by tuf gene sequencing. Biofilm production was determined using Congo red agar (CRA) and Microtiter plate (MTP) assay. The mecA and biofilm associated genes (icaAD, fnbA and bap) were detected using PCR method. From the 558 samples from community and hospital environments, 292 MR-CoNS were isolated (41 from community environments, and 251 from hospital environments). S. haemolyticus (41.1%) and S. epidermidis (30.1%) were the predominant species in this study. Biofilm production was detected in 265 (90.7%) isolates by CRA, and 260 (88.6%) isolates were detected by MTP assay. The staphylococci isolates derived from hospital environments were more associated with biofilm production than the community-derived isolates. Overall, the icaAD and bap genes were detected in 74 (29.5%) and 14 (5.6%) of all isolates from hospital environments. When tested by MTP, the icaAD gene from hospital environment isolates was associated with biofilm biomass. No association was found between bap gene and biofilm formation. The MR-CoNS isolates obtained from community environments did not harbor the icaAD and bap genes. Conversely, fnbA gene presented in MR-CoNS isolated from both community and hospital environments. The high prevalence of biofilm producing MR-CoNS strains demonstrated in this study indicates the persisting ability in environments, and is useful in developing prevention strategies countering the spread of MR-CoNS.
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Affiliation(s)
- Rathanin Seng
- Department of Microbiology and Parasitology, Faculty of Medical Science, Naresuan University, Phitsanulok, Thailand
| | - Thawatchai Kitti
- Faculty of Oriental Medicine, Chiang Rai College, Chiang Rai, Thailand
| | - Rapee Thummeepak
- Department of Microbiology and Parasitology, Faculty of Medical Science, Naresuan University, Phitsanulok, Thailand
| | - Phattaraporn Kongthai
- Department of Microbiology and Parasitology, Faculty of Medical Science, Naresuan University, Phitsanulok, Thailand
| | - Udomluk Leungtongkam
- Department of Microbiology and Parasitology, Faculty of Medical Science, Naresuan University, Phitsanulok, Thailand
| | - Surat Wannalerdsakun
- Department of Medicine, Division of Infectious Diseases, Faculty of Medicine, Naresuan University, Phitsanulok, Thailand
| | - Sutthirat Sitthisak
- Department of Microbiology and Parasitology, Faculty of Medical Science, Naresuan University, Phitsanulok, Thailand
- Centre of Excellence in Medical Biotechnology, Faculty of Medical Science, Naresuan University, Phitsanulok, Thailand
- * E-mail:
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Ghosh A, Singh Y, Kapil A, Dhawan B. Staphylococcal Cassette Chromosome mec (SCCmec) typing of clinical isolates of coagulase-negative staphylocci (CoNS) from a tertiary care hospital in New Delhi, India. Indian J Med Res 2017; 143:365-70. [PMID: 27241652 PMCID: PMC4892085 DOI: 10.4103/0971-5916.182629] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Affiliation(s)
- Arnab Ghosh
- Department of Microbiology, All India Institute of Medical Sciences, New Delhi 110 029, India
| | - Yogesh Singh
- Department of Microbiology, University of Delhi, South Campus, New Delhi 110 021, India
| | - Arti Kapil
- Department of Microbiology, All India Institute of Medical Sciences, New Delhi 110 029, India
| | - Benu Dhawan
- Department of Microbiology, All India Institute of Medical Sciences, New Delhi 110 029, India
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Epidemiology of Neonatal Sepsis and Implicated Pathogens: A Study from Egypt. BIOMED RESEARCH INTERNATIONAL 2015; 2015:509484. [PMID: 26146621 PMCID: PMC4471255 DOI: 10.1155/2015/509484] [Citation(s) in RCA: 94] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Revised: 05/09/2015] [Accepted: 05/11/2015] [Indexed: 02/07/2023]
Abstract
Prospective analytic study was conducted in NICUs of three Egyptian Neonatal Network (EGNN) participants in Mansoura Hospitals in Egypt over a period of 18 months from March 2011 to August 2012. By using EGNN 28-day discharge form, all demographic, clinical, and laboratory data were recorded and studied. During the study period, 357 neonates were diagnosed as suspected sepsis with an incidence of 45.9% (357/778) among the admitted neonates at the three neonatal intensive care units. 344 neonates (sex ratio = 1.3:1) were enrolled in the study in which 152 (44.2%) were classified as early onset sepsis EOS (≤72 hr) and 192 (55.8%) as late onset sepsis LOS (>72 hr). Among the LOS cases, 33.9% (65/192) were caused by nosocomial infections. In 40.7% (140/344), sepsis was confirmed by positive blood culture. The total mortality rate for the proven neonatal sepsis was 51% (25/49) and 42.9% (39/91) for EOS and LOS, respectively. Coagulase negative staphylococci were predominant isolates in both EOS and LOS, followed by Klebsiella pneumoniae. Most of the bacterial isolates had low sensitivity to the commonly used empiric antibiotics. However, 70.1% (89/127) exhibited multidrug resistance. Best sensitivities among Gram-positive isolates were found against imipenem, ciprofloxacin, vancomycin, and amikacin.
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Identification and characterization of methicillin-resistant Staphylococcus aureus, Staphylococcus epidermidis, Staphylococcus haemolyticus and Staphylococcus pettenkoferi from a small animal clinic. Vet Microbiol 2013; 167:680-5. [PMID: 23992797 DOI: 10.1016/j.vetmic.2013.07.036] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2013] [Revised: 07/21/2013] [Accepted: 07/24/2013] [Indexed: 11/21/2022]
Abstract
The aim of this study was to isolate and characterize methicillin-resistant staphylococci (MRS) in a small animal clinic and to investigate their distribution and possible transmission. Swabs (n=72) were taken from hospitalized pets, the environment and employees of a small animal clinic and screened for the presence of MRS. The staphylococcal species was confirmed biochemically or by 16S rDNA sequencing. Susceptibility to antimicrobial agents was tested by broth dilution. The presence of mecA and other resistance genes was confirmed by PCR. Molecular typing of the isolates followed standard procedures. In total, 34 MRS belonging to the four species Staphylococcus aureus (n=5), Staphylococcus epidermidis (n=21), Staphylococcus haemolyticus (n=6) or Staphylococcus pettenkoferi (n=2) were isolated. All isolates were multidrug-resistant with resistance to at least three classes of antimicrobial agents. Among the five methicillin-resistant S. aureus (MRSA) isolates, four belonged to the clonal complex CC398; two of them were isolated from cats, the remaining two from pet cages. Overall, the MRS isolates differed in their characteristics, except for one S. epidermidis clone (n=9) isolated from hospitalized cats without clinical staphylococcal infections, pet cages, the clinic environment as well as from a healthy employee. This MRSE clone was resistant to 10 classes of antimicrobial agents, including aminocyclitols, β-lactams, fluoroquinolones, lincosamides, macrolides, phenicols, pleuromutilins, sulfonamides, tetracyclines and trimethoprim. These findings suggest a possible transmission of specific MRS isolates between animal patients, employees and the clinic environment.
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Martins A, Riboli DFM, Camargo CH, Pereira VC, de Almeida Sampaio R, de Souza da Cunha MDLR. Antimicrobial resistance and persistence of Staphylococcus epidermidis clones in a Brazilian university hospital. Diagn Microbiol Infect Dis 2013; 77:164-8. [PMID: 23906562 DOI: 10.1016/j.diagmicrobio.2013.06.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2013] [Revised: 05/24/2013] [Accepted: 06/01/2013] [Indexed: 11/27/2022]
Abstract
Oxacillin is an alternative for the treatment of Staphylococcus spp. infections; however, resistance to this drug has become a major problem over recent decades. The main objective of this study was to epidemiologically characterize coagulase-negative staphylococci (CoNS) strains recovered from blood of patients hospitalized in a Brazilian teaching hospital. Oxacillin resistance was analyzed in 160 strains isolated from blood culture samples by phenotypic methods, detection of the mecA gene, and determination of intermediate sensitivity to vancomycin on brain heart infusion agar supplemented with 4 and 6 μg/mL vancomycin. In addition, characterization of the epidemiological profile by staphylococcal cassette chromosome mec (SCCmec) typing and clonal analysis by pulsed-field gel electrophoresis (PFGE) were performed. The mecA gene was detected in 72.5% of the isolates. Methicillin-resistant CoNS isolates exhibited the highest minimum inhibitory concentrations and multiresistance when compared to methicillin-susceptible CoNS strains. Typing classified 32.8% of the isolates as SCCmec I and 50% as SCCmec III. PFGE typing of the SCCmec III Staphylococcus epidermidis isolates identified 6 clones disseminated in different wards that persisted from 2002 to 2009. The high oxacillin resistance rates found in this study and clonal dissemination in different wards highlight the importance of good practices in nosocomial infection control and of the rational use of antibiotic therapy in order to prevent the dissemination of these clones.
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Affiliation(s)
- André Martins
- Department of Tropical Diseases and Diagnostic Imaging, Botucatu Medical School, UNESP - Univ Estadual Paulista, City of Botucatu, Brazil; Department of Microbiology and Immunology, Biosciences Institute, UNESP - Univ Estadual Paulista, City of Botucatu, Brazil
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Alvarez AS, Remy L, Allix-Béguec C, Ligier C, Dupont C, Leminor O, Lawrence C, Supply P, Guillemot D, Gaillard JL, Salomon J, Herrmann JL. Patient nostril microbial flora: individual-dependency and diversity precluding prediction of Staphylococcus aureus acquisition. Clin Microbiol Infect 2013; 20:70-8. [PMID: 23601162 DOI: 10.1111/1469-0691.12208] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2012] [Revised: 02/09/2013] [Accepted: 02/28/2013] [Indexed: 11/30/2022]
Abstract
The potential role of a patient's resident microbial flora in the risk of acquiring multiresistant bacteria (MRB) during hospitalization is unclear. We investigated this role by cross-sectional study of 103 patients at risk of acquisition of Staphylococcus aureus (SA), resistant (MRSA) or not (MSSA) to methicillin, recruited in four French hospitals. The flora was analysed by an exhaustive culture-based approach combined with molecular and/or mass-spectrometry-based identification, and SA strain typing. Forty-three of the 53 SA-negative patients at entry were followed for up to 52 weeks: 19 (44.2%) remained negative for SA and 24 (55.8%) became positive, including 19 (79%) who acquired an MSSA, four (17%) who acquired an MRSA and one who acquired both (4%). Fifty-one different species were identified among the 103 patients, of which two, Corynebacterium accolens and Staphylococcus haemolyticus (p = 0.02-0.01), were more prevalent in the absence of SA. However, the same number of patients carrying or not these two species acquired an MSSA/MRSA during follow-up, regardless of antibiotic treatment received. Clustering analysis showed that the microbial flora was highly specific to each patient, and not predictive for acquisition of MSSA/MRSA or not. Patient-specific microbial resident flora is not predictive of SA acquisition.
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Affiliation(s)
- A S Alvarez
- University of Versailles St Quentin in Yvelines and UFR des Sciences de la Santé, Montigny le Bretonneux, France; Assistance Publique - Hôpitaux de Paris, Raymond Poincaré Hospital, Microbiology Laboratory, Garches, France
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Kim JW, Chung GT, Yoo JS, Lee YS, Yoo JI. Autolytic activity and molecular characteristics of Staphylococcus haemolyticus strains with induced vancomycin resistance. J Med Microbiol 2012; 61:1428-1434. [DOI: 10.1099/jmm.0.041046-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Affiliation(s)
- Jung Wook Kim
- Division of Antimicrobial Resistance, Center for Infectious Diseases, Korea National Institute of Health, Osong, Republic of South Korea
| | - Gyung Tae Chung
- Division of Antimicrobial Resistance, Center for Infectious Diseases, Korea National Institute of Health, Osong, Republic of South Korea
| | - Jung Sik Yoo
- Division of Antimicrobial Resistance, Center for Infectious Diseases, Korea National Institute of Health, Osong, Republic of South Korea
| | - Yeong Seon Lee
- Division of Antimicrobial Resistance, Center for Infectious Diseases, Korea National Institute of Health, Osong, Republic of South Korea
| | - Jae Il Yoo
- Division of Antimicrobial Resistance, Center for Infectious Diseases, Korea National Institute of Health, Osong, Republic of South Korea
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Staphylococcus haemolyticus as an important hospital pathogen and carrier of methicillin resistance genes. J Clin Microbiol 2011; 50:166-8. [PMID: 21976766 DOI: 10.1128/jcm.05563-11] [Citation(s) in RCA: 111] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Phenotypic and molecular methods were used to characterize the antibiotic resistance of 64 clinical isolates of Staphylococcus haemolyticus. By PCR of the mecA gene, 87% were found to be methicillin resistant. Approximately 55% harbored staphylococcal cassette chromosome mec element (SCCmec) type V, and only one SCCmec type IV. Many isolates (75%) displayed multiresistance, and pulsotype analysis showed a high diversity.
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Bouchami O, Hassen A, Lencastre H, Miragaia M. High prevalence of mec complex C and ccrC is independent of SCCmec type V in Staphylococcus haemolyticus. Eur J Clin Microbiol Infect Dis 2011; 31:605-14. [DOI: 10.1007/s10096-011-1354-3] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2011] [Accepted: 07/07/2011] [Indexed: 10/17/2022]
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Ma XX, Sun DD, Hu J, Wang EH, Luo EJ. Epidemiological and molecular characterization ofStaphylococcus haemolyticusstrains, from a hematology ward, with decreased susceptibility to glycopeptides. Can J Microbiol 2011; 57:476-84. [DOI: 10.1139/w11-033] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In the present study, we report on the reduced susceptibility to teicoplanin among clinical isolates of Staphylococcus haemolyticus in a hematology ward of a teaching hospital. The molecular characterization of 17 S. haemolyticus strains was performed using mec gene complex classification, pulsed-field gel electrophoresis analysis, and minimum inhibitory concentration examination. Pulsotype A strains carrying a class C2 mec gene complex were the most prevalent strains, at 64.7%. In vivo selection of stepwise increase in resistance to vancomycin and teicoplanin was observed in three S. haemolyticus strains serially isolated from a case patient. The results of the present study suggest the regional spread of certain S. haemolyticus clones with diminished susceptibility to glycopeptides, emphasizing the need for continuous monitoring of minimum inhibitory concentration levels of vancomycin and teicoplanin in S. haemolyticus strains, and the importance of infection control practices to prevent its transmission.
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Affiliation(s)
- Xiao Xue Ma
- Department of Medical Microbiology and Parasitology, College of Basic Medical Sciences, China Medical University, No. 92, North 2-Road, Heping District, Shenyang 110001, People’s Republic of China
| | - Dan Dan Sun
- Department of Medical Microbiology and Parasitology, College of Basic Medical Sciences, China Medical University, No. 92, North 2-Road, Heping District, Shenyang 110001, People’s Republic of China
| | - Jian Hu
- Department of Medical Microbiology and Parasitology, College of Basic Medical Sciences, China Medical University, No. 92, North 2-Road, Heping District, Shenyang 110001, People’s Republic of China
| | - En Hua Wang
- Institute of Pathology and Pathophysiology, China Medical University, Shenyang, People’s Republic of China
| | - En Jie Luo
- Department of Medical Microbiology and Parasitology, College of Basic Medical Sciences, China Medical University, No. 92, North 2-Road, Heping District, Shenyang 110001, People’s Republic of China
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