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Summer Research Fellowship Programme of India's Science Academies

Antibiotic susceptibility pattern of Staphylococcal strains isolated from indoor environments

Sanjana S

Integrated MSc in Biological Sciences, Dept. of Life Science, Bangalore University, Bangalore 560002

Prof Kasturi Mukhopadhyay

School of Environmental Sciences, Jawaharlal Nehru University, New Mehrauli Road, New Delhi 110067

ABSTRACT

Bioaerosols are airborne aerosol pollutants which are comprised of microorganisms including bacteria, fungi, viruses or organic compounds derived from them like toxins and other microbial components. Staphylococcus aureus, also a bioaerosol, is a Gram positive bacterium and is a major human pathogen causing community- and nosocomial infections. Many strains of this bacterium have developed resistance to various classes of antibiotics. Methicillin-resistant S. aureus (MRSA) and Vancomycin-resistant Staphylococcus aureus (VRSA) are a great threat due to their resistance to last resort antibiotics, making their infections difficult to treat. MRSA have been found as airborne bacteria in hospital rooms and in homes. The aim of this study was to understand the antibiotic sensitivity pattern of different strains of Staphylococcus collected from indoor environments and to identify genetic markers in antibiotic- resistant strains. Microdilution antimicrobial susceptibility tests for aerobic bacteria were carried out according to CLSI (Clinical and Laboratory Standards Institutes) Methods. A total of 22 Staphylococcal strains were used which had been previously isolated from Central Library, Jawaharlal Nehru University, New Delhi.

Keywords: Bioaerosols, Staphylococcus, Community acquired, Noscomial, Antibiotic resistance

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