Prevalence of common infectious diseases in Commercial broiler farm in Chattogram district, Bangladesh

Abstract

This study was schemed to investigate the disease prevalence along with their associate risk factors in broiler chickens focusing Infectious bursal disease, Newcastle disease, Colibacillosis and Chronic respiratory disease, spatial distribution of these diseases in Chattogram district. Total 141 birds from 50 farms were collected, among which 71 broiler sick and dead chickens were selected at Department of Pathology and Parasitology of CVASU out of which 25.35% Colibacillosis, 23.94% Infectious bursal disease, 18.31% Chronic respiratory disease and 9.86% Newcastle disease were found. The main pathologic features were found hemorrhage in proventriculus, button ulcer in intestine in ND; enlarged or atrophied and hemorrhagic bursa in IBD; pericarditis, perihepatitis, septicemia in Colibacillosis and mucoid or hemorrhagic exudate in trachea, congested trachea, air sacculitis and conjunctivitis in case of CRD. Among different risk factors, age, floor type and litter type were found statistically significant (p≤0.05) in IBD and flock size, litter type were significant (p≤0.05) in CRD. Raozan was predominantly hotspot of these diseases and disease prevalence was also higher at Sitakunda, Hathazari and Anowara in Chattogram district.