Molecular epidemiology of clinical and carrier strains of methicillin resistant Staphylococcus aureus (MRSA) in the hospital settings of north India.

Background: The study was conducted between 2000 and 2003 on 750 human subjects, yielding 850 strains of staphylococci from clinical specimens (575), nasal cultures of hospitalized patients (100) and eye & nasal sources of hospital workers (50 & 125 respectively) in order to determine their epidemiology, acquisition and dissemination of resistance genes.

Methods: Organisms from clinical samples were isolated, cultured and identified as per the standard routine procedures. Susceptibility was measured by the agar diffusion method, as recommended by the National Committee for Clinical Laboratory Standards (NCCLS).

Methicillin-resistant Staphylococcus aureus: need for constant surveillance,stringent control and vigorous treatment measures.

Staphylococcus aureus has shown a disconcerting propensity to develop resistance to antimicrobial agents and an increasing proportion of these have become resistant to methicillin as well. Regular surveillance should be carried out in every hospital and stringent infection control measures and vigorous treatment should be employed to prevent the nosocomial spread of MRSA. A total of 1056 MRSA were isolated from various specimens received in bacteriology division of SKIMS Srinagar out of which 46.