ANTI-BIOGRAM ASSAY OF ESCHERICHIA AND SALMONELLA ISOLATES FROM MILK OF GREATER GUWAHATIANUSMITA BARUAH, MANAB DEKA, HABIBUR RAHMAN" AND DEBABRAT BAISHYA
Zoonotic diseases are becoming significant, because of the fact that they may be the reasons of transmission of potential or emerging pathogens among the human population. Milk or the milk products may be one of such animal products carrying such pathogens. Anti-biogram study was carried out against E.coli and Salmonella sp. Encountered in milk samples from Guwahati market. From a total of 64 numbers of milk samples, 13 numbers of E.coli and 27 numbers of Salmonella isolates have been recovered. Out of 13 numbers of E.coli, 8 isolates were found to be resistant to Ampicillin, 3 to Chloramphenicol, 9 to Cephalexin antibiotics and 12 were sensitive to Gentarnicin, 2 to Ampicillin, 3 to Chloramphenicol, 4 to Sparfloxacin and 4 to Norfloxacin. In case of Salmonella, 14 isolates were sensitive to Sparfloxacin, 13 to Norfloxacin, 5 to Chloramphenicol, however, 14 were found to be resistant to Norfloxacin, 18 to Gentamicin, 13 to Chloramphenicol, 18 to Cephalexin and 18 to Ampicillin. The presence of antibiotic resistant E.coli may draws attention, because some of these strains may be toxigenic or enterohemorrhagic. The presence of antibiotic resistant Salmonella in milk samples is also significant from the point of view of consumers' health. The present work indicates a dangerous situation of milk supplied in Guwahati market. It may lead to health hazards if the milk is not treated properly before consumption.
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