ISOLATION OF SALMONELLA AND ESCHERICHIA FROM THE SHELL SURFACE OF INDIGENOUS CHICKEN EGG IN CHITTAGONG METROPOLITAN AREA

Abstract

The present study was conducted to know the prevalence of bacteria under the genus of Salmonella and Esherichia in the shell surface of local chicken egg in different market in Chittagong metropolitan during the period of August, 2014 to 31 August, 2014. This study presents the degree of contamination of local chicken eggs with bacteria of the genus Escherichia, Salmonella taking into account the source of the eggs. The samples were collected randomly. Samples were collected by swabbing to buffer peptone water and then cultured in MacConkey agar and Eosin Methyline Blue agar.The results of the study indicate a relatively high degree of contamination of local chicken eggs with Salmonella bacteria and Esherichia coli on egg shell surface. Results revealed that 52% of egg shell were contaminated with E. coli and 42% were contaminated with Salmonella. Only 6% eggs were found without any Salmonella or E. coli on their shell surface. All of five markets have Salmonella and E. coli in egg shell. Riaz Uddin Bazar has the highest 70% E. coli on egg shell and Karnafuli market has highest 80% Salmonella on egg shell of local chicken egg. So, egg shell of local chicken eggs are highly contaminated with Salmonella and E. coli.