Molecular Characterization of <i>Staphylococcus epidermidis</i> Isolates Recovered from Patients Admitted to a Referral Hospital in Iran
| Author | Amirmorteza Ebrahimzadeh Namvar | en |
| Author | Seyed Asghar Havaei | en |
| Author | Masoumeh Douraghi | en |
| Issued Date | 2017-04-30 | en |
| Abstract | Background: Coagulase-negative Staphylococci (CoNS), especially Staphylococcus epidermidis, are considered as commensal bacteria of human skin and oral-nasal mucosa. Because of having many various virulence factors as well as the emergence of the multidrug-resistant (MDR) strains, this microorganism is regarded as a major cause of hospital-acquired bacteremia and invasive nosocomial infections. Objectives: Due to the significance of S. epidermidisassociated infections in different health care units, the aim of this study was to determine the molecular epidemiology of S. epidermidis in true infection-associated isolates. Methods: In our cross sectional study, a total of 183 S. epidermidis strains was collected during 8 months. Only 40 strains, which were identified as “true” infection-associated strains, were assessed via antibiotic susceptibility testing and pulsed field gel electrophoresis (PFGE) typing. Finally, strains with specific assigned pulsotypes were also analyzed by multilocus sequence typing (MLST). Results: Specimens were most commonly obtained from the bloodstream, wound, and catheter. More than half (75%) of the tested strains were found to be resistant to cefoxitin and ciprofloxacin (60%), while 45% of strains showed resistance to tetracycline. Using PFGE, 3 clones (A, B and C) were identified. According to MLST, the frequency of ST2 and ST5 was more prominent than the other STs. Conclusions: In accordance with the life cycle of S. epidermidis, molecular characterization of invasive isolates is essential for controlling the epidemic strains in health care units. | en |
| DOI | https://doi.org/10.5812/archcid.38675 | en |
| Keyword | Nosocomial Infections | en |
| Keyword | Multidrug-Resistance (MDR) | en |
| Keyword | Pulse Field Gel Electrophoresis (PFGE) | en |
| Keyword | Multilocus Sequence Typing (MLST) | en |
| Keyword | <i>Staphylococcus epidermidis</i> | en |
| Publisher | Brieflands | en |
| Title | Molecular Characterization of <i>Staphylococcus epidermidis</i> Isolates Recovered from Patients Admitted to a Referral Hospital in Iran | en |
| Type | Research Article | en |
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