Detection of Chromobacterium Violaceum in  Pasteurized Milk Samples From an Organized Dairy  Plant in Thrissur, Kerala

Ambily R; Beena A.K.; Krishna; S. V.

Volume : IV, Issue : III, March - 2014

Detection of Chromobacterium Violaceum in Pasteurized Milk Samples From an Organized Dairy Plant in Thrissur, Kerala

Ambily R, Beena A. K. , Krishna, S. V.

Abstract :

This report includes the identification and antibiogram study of Chromobacterium violaceum obtained from pasteurized milk sample collected from an organized dairy plant in Thrissur district of Kerala. The deep violet colored colonies obtained on the nutrient agar plate during the bacteriological analysis of the pasteurized milk samples were subjected to staining and biochemical characterization, the results of which indicated the identity of isolate as Chromobacterium violaceum. In the attempt made to trace the source of this organism, C. violaceum was isolated from the water samples collected from the dairy plant. The antibiogram revealed that the organism was resistant to cephalosporins and penicillin group of antibiotics. The total viable count, coliform count and E. coli count of the milk samples were well within the limits prescribed by FSSA. The presence of an opportunistic pathogen like C. violaceum in processed milk samples which conforms to microbiological standards warrants further investigation.