PREVALENCE OF NASAL CARRIAGE OF STAPHYLOCOCCUS AUREUS AND METHICILLIN RESISTANT STAPHYLOCOCCUS IN AROUND SOUTH CHENNAI POPULATION
Dr. R. Ilayaraja*, Dr. Sriram D. K. and Dr. K. Ashwin Karuppan
To study the prevalence of the nasal carriage of staphylococcus aureus and Methicillin Resistant Staphylococcus aureus in and around Tambaram and to correlate with certain risk factors and among healthy hospital care workers. The study material consisted of 400 nasal swabs were collected from community in and around Tambaram, Chennai. 102 hospital workers were screened for nasal carriage of staphylococcus aureus and MRSA at Hindu Mission Hospital during the period of 6 months from November 2015 to April 2016. All the samples were subjected to gram staining and bacterial culture and S. aureus isolates were screened for MRSA prevalence using microbiological methods. All the clinical isolates are subjected to antimicrobial susceptibility testing on Mueller Hinton agar using the Kirby-Bauer disc diffusion method. S. aureus was the most common pathogen among the Gram-positive bacteria isolated from nasal carriage. Results: Out of 400 samples, 29% Staphylococcus aureus was isolated, 1.25% were found to be Methicillin-resistant Staphylococcus aureus (MRSA) in community and Out of 102 samples, 17.64% Staphylococcus aureus was isolated, 1.96% were found to be Methicillin-resistant Staphylococcus aureus (MRSA) in hospital workers. The number of MRSA positive individuals was only 5 out of 400. This is a low number to assess the risk factors associated with CA-MRSA. Community based study should be conducted in a larger scale in order to study the risk factors associated with the CA-MRSA status.
Keywords: Staphylococcus aureus, MRSA, Nasal Swab, Community.
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