Asian Journal of Microbiology, Biotechnology & Environmental Sciences Paper

Vol.13, Issue 4, 2011; Page No.(647-650)

MULTIPLE ANTIBIOTIC RESISTANCE PROFILE OF SOIL BACTERIA ISOLATED FROM MAHATMA GANDHI UNIVERSITY CAMPUS, KOTTAYAM, KERALA, INDIA

M.P. KRISHNA, RINOY VARGHESE, DEVI K. BALAN, H.T. HARSHA AND A.A. MOHAMED HATHA

Abstract

In the present work, multiple antibiotic resistance patterns of heterotrophic bacteria isolated from the soils of Mahatma Gandhi University campus was studied. A total of 46 bacterial strains were isolated and tested for their sensitivity to 10 commonly used antibiotics (ampicillin, erythromycin, gentamicin, nalidixic acid, penicillin, amikacin, lincomycin, novobiocin, vancomycin and tetracycline) using the Kirby-Bauer technique. More than 90% of the isolates were resistant to at least one antibiotic. Resistance to ampicillin (73.91%), penicillin (60.8%), lincomycin (43.47%) and nalidixic acid (21.73%) were frequently encountered. While none of the isolates were resistant to amikacin, resistant to gentamicin (2.17%) and tetracycline (2.17%) was very low. A total of 18 resistant patterns were observed among the isolates and the most frequent (30.4%) resistant pattern was PA (penicillin-ampicillin). Many isolates had acquired multiple drug resistance (MDR). Elucidation of multiple antibiotic resistance (MAR) index and resistance patterns of each isolates, which revealed high prevalence of MAR among the isolates encountered in the present study.

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