INVESTIGATION OF INHIBITORY ACTIVITY OF ENTEROCOCCI ISOLATED FROM THE DIGESTIVE TRACT OF CHICKENS AGAINST SOME ENTEROPATHOGENIC BACTERIA

Inhibitory activity of 96 strains of enterococci, isolated from chicken’s digestive tract is studied. 52 strains of them are isolated from chickens reared in industrial conditions and 44 strains – from chickens reared in natural domestic conditions. Antimicrobial activity of isolated enterococci against 4 strains of enteropathogenic E. coli and 3 strains of Salmonella bacteria (S. typhimurium, S. enteritidis and S. gallinarium) is determined. Higher inhibitory activity against tested enteropathogenic strains is observed for enterococci, isolated from digestive tract of chickens, reared in natural domestic conditions. The maximum inhibitory activity was 86.00 % against E. coli and 84.82%, 84.00 % and 83.46 % against S. typhimurium, S. enteritides and S. gallinarum respectively