期刊
JOURNAL OF KOREAN MEDICAL SCIENCE
卷 24, 期 4, 页码 585-591出版社
KOREAN ACAD MEDICAL SCIENCES
DOI: 10.3346/jkms.2009.24.4.585
关键词
Enterotoxin Genes; Staphylococcus aureus; Bacteremia; Nasal Carriage
资金
- Korea Centers for Disease Control and Prevention (KCDC)
- Samsung Biomedical Research Institute [SBRI C-A64151]
- Asian-Pacific Research Foundation for Infectious Diseases (ARFID)
In this study, we investigated the genetic background of 70 Staphylococcus aureus isolates (36 methicillin-resistant S. aureus [MRSA] and 34 methicillin-susceptible S. aureus [MSSA]) obtained from blood at a Korean tertiary-care hospital, using spa typing, multilocus sequence typing, and SCC mec typing. In addition, the prevalence of enterotoxin (sea, seb, sec. sed, see, seg, seh, sei, and sek), tst, and pvl genes among the samples was assessed via polymerase chain reaction, and the results were compared with those of 95 isolates of S. aureus obtained from nasal swabs. All MRSA isolates from blood, except one, belonged to three major clones: sequence type (ST)5-MRSA-II, ST72-MRSA-II (or IVA), and ST239-MRSA-III, among which ST5-MRSA-II was the predominant clone. The prevalence of enterotoxin genes in the S. aureus isolates obtained from blood differed significantly from those from the nasal swabs for the sea, seb, sec, and seh gene. In particular, the seb and sec genes were detected exclusively in the MRSA isolates of ST5 or spa-CC002, thereby suggesting the co-adaptation of virulence genes with the genetic background and their contribution to biological fitness.
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