First report of mecC gene in clinical methicillin resistant S. aureus (MRSA) from tertiary care hospital Islamabad, Pakistan.

Journal of Infection and Public Health
Amir Afzal KhanRabaab Zahra

Abstract

Staphylococcus aureus (S. aureus) is one of the leading causes of community and hospital acquired infections globally. The objective of the study was to assess the prevalence, study the carriage of antibiotic resistance genes and evaluate the molecular typing of S. aureus isolates from a tertiary care hospital in Islamabad. A total of 1528 staphylococci isolates were included in this study. Standard microbiological procedures were applied to identify S. aureus. Antimicrobial susceptability was evaluated using the disk diffusion method and Minimum Inhibitory Concentrations (MICs) were determined using microbroth dilution method following Clinical and Laboratory Standards Institute (CLSI) guidelines. Multiplex PCR was used to detect antibiotic resistance genes, and molecular typing was performed using agr, SCCmec, spa, and Multi-Locus Sequence Typing (MLST) and clonal relatedness by Pulse Field Gel Electrophoresis (PFGE) methods. Overall 65% were MRSA and 35% were methicillin sensitive Staphylococcus aureus (MSSA). Among MRSA isolates, 83% were multi-drug resistant and mecA was found in 54% isolates, mecC was in 3% while 1 MRSA carried both mecA and mecC genes. agrI (22%) was most prevalent group in MRSA, while agrIII (16%) was o...Continue Reading

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