Ecology, Environment and Conservation Paper

ANTIBIOGRAM CHARACTERISTICS OF BACTERIAL STRAINS ISOLATED FROM THE THAMIRABARANI RIVER

S. Umamaheswari, K.B. Ramakrishnan and G.S. Vijayalakshmi Sri Paramakalyani

Abstract

Sensitivity tests of 9 antibiotics viz. Ampicillin 10 pg. Erythromyc;n 15 pg. Nalidyxic acid 30 pg. Amikacin 30 pg. Streptomycin 30 pg. Chloramphenicol 30 pg. Penicillin 10 U, Tetracycline 10 pg and Ciproflaxin 30 pg were performed against six bacterial strains viz. Bacillus sp., Klebsiella sp., Enterobocter sp., Aeromonas sp., Vibrio sp., Escherichia coli, Staphylococcus sp. and Micrococcus sp. isolated from the upstream and downstream site of river Thamirabarani at Ambasamudram. Amikacin 30 pg and Ciproflaxin 30 pg were highly effective against all bacterial strains isolated from the upstream site sample. All the bacterial cultures from the downstream site were highly sensitive to Streptomycin 30 pg. Chloramphenicol 30 pg and Ciproflaxin 30 pg. Except Bacillus sp. all other bacterial cultures from the downstream site exhibited resistant nature to Penicillin 10 U. Ampicillin 10 pg was found to be less effective antibiotic to the Gram-negative rods and Gram positive coccus isolated from the Thamirabarani River. Generally, varied inhibitory activities of antibiotics to different microbial species were observed.