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- W3202633094 abstract "Background: Clinically significant bloodstream infection (BSI)due to Staphylococcus aureus(S.aureus)isa significant pathogen in community acquired and nosocomial BSI. Methicillin Resistant Staphylococcus aureus (MRSA) are resistant to methicillin and all χ-lactam antibiotics due to possession of mec A gene. Several phenotypic methods for laboratory detection of MRSA: oxacillin screening test, oxacillin or cefoxitin disc diffusion method, oxacillin minimum inhibitory concentration test are used routinely in our setting. Aim: We aim to detect MRSA among blood culture isolates by conventional method (cefoxitin disc) and also to confirm identity of these MRSA strains by molecular method i.e. mecA detection by Polymerase Chain Reaction(PCR). Materials and Methods: This cross sectional study was carried out on 139 S. aureus clinical isolates in Department of Microbiology from blood samples submitted for culture and sensitivity test. Once the isolate was identified as S. aureus, it was further identified as MRSA or Methicillin Sensitive Staphylococcus aureus (MSSA) by use of antimicrobial discs. DNA extraction was done by boiling method. Results: Antimicrobial susceptibility pattern documented resistance of 48.9% of isolates to cefoxitin (MRSA). 80.2% and 63.3% of isolates were resistant to penicillin and cotrimoxazole respectively. All isolates were susceptible to vancomycin. Conventional PCR was carried out for all 139 samples. 51.1% of isolates harbored mecA gene thus identified as MRSA. Conclusion: As expected PCR performed superior, however due to less cost, simplicity and easy availability, cefoxitin disc diffusion test holds a significance as an alternative to PCR for detection of MRSA on routine basis in a resource limited setting like ours." @default.
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- W3202633094 date "2020-01-01" @default.
- W3202633094 modified "2023-09-23" @default.
- W3202633094 title "Comparative evaluation of conventional method versus polymerase chain reaction for detection of methicillin resistant staphylococcus aureus isolated from blood stream infections" @default.
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