PREVALENCE OF COLIBACILLOSIS OF COMMERCIAL BROILER IN KISHOREGANG REGION

Abstract

Avian colibacillosis is an infectious disease caused by E. coli. It is a common disease in poultry flocks worldwide especially in the intensive farming system including Bangladesh. The present study was conducted in Aftab Poultry Diagnostic Laboratory, Bhagalpur, Bajitpur, Kishoregang. About 75 broiler of different ages were collected where sick (n=25) and dead (n=50) birds manifesting the characteristics clinical sign of colibacillosis (watery diarrhea, weakness, anorexia and weight loss etc) from five poultry farms in Kishoregang district. Cloacal samples of sick birds were collected aseptically in sterile test tubes. After collection of swab sick broiler were euthanized by intracardial administration of saturated MgSo4 solution. A thorough post mortem examination of all broiler birds was carried out. Liver and spleen samples were collected separately in sterile test tubes for further bacteriological examination. Out of 75 samples 54 were observed positive. The overall prevalence of colibacillosis in broiler was 72.00%. Prevalence of colibacillosis in day old-7 day, 8-14 day, 15-21 day, 22-28 day, 28-35 day was 73.33%, 75.00%, 90.47%, 71.42%, 38.46% respectively. Chi-square test using age group as independent variable reveals that there was no significant difference of occurrence of colibacillosis in different age groups in broiler. From the finding it may be concluded that colibacillosis is endemic in this area. Thus preventive measures should be taken from the starting point of the birds rearing. Strict biosecurity measurement, improved managemental system and use of effective antibiotic against colibacillosis should be implemented to control this disease in broiler.