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Year : 2014  |  Volume : 1  |  Issue : 1  |  Page : 21-24

Prevalence of community-acquired methicillin-resistant Staphylococcus aureus in patients with skin and soft tissue infections

Department of Microbiology, Maulana Azad Medical College, New Delhi, India

Correspondence Address:
Ralte Lalremruata
Room No 36, PG Men's Hostel, Maulana Azad Medical College, New Delhi - 02
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/2225-6482.141749

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Introduction: In the early nineties, infections due to methicillin-resistant Staphylococcus aureus (MRSA) in patients without previous healthcare exposure were reported. The continued evolution of MRSA is illustrated by the infections caused by community acquired MRSA and the majority of these infections are nonlife-threatening infections of the skin and soft tissues. We carried out the retrospective study of bacterial isolates obtained from pus specimens of community-acquired skin and soft tissue infections in our set up with special reference to MRSA. Materials and Methods: The isolation rate of various organisms isolated from pus specimens was recorded for the years 2007 to 2012. The antibiotic susceptibility patterns of S. aureus strains (MRSA and MSSA) were also reviewed. Results: 47.48% of the total pus samples received from patients with a clinical diagnosis of community acquired SSTI during the period of 6 years, that is, from 2007 to 2012, showed culture positivity. Mixed organisms were isolated from five samples. 30.21% of them were S. aureus strains out of which 23.80% demonstrated the presence of methicillin resistance (MRSA). All the MRSA strains (100%) screened from clinical specimens were resistant to penicillin, cephalexin and cefazolin; 40% to erythromycin, clindamycin and amikacin; 80% to gentamicin; 90% to ofloxacin. The isolation rate of MRSA is far outnumbered by that of MSSA that remains fairly sensitive to the first line drugs against S. aureus. Conclusion: Abscesses are the most common clinical presentation caused by CA-MRSA in this study and we recommend that physicians should consider obtaining cultures and antimicrobial susceptibility tests in all such patients.

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