Prevalence of Infectious Bursal Disease (IBD) in Selected Commercial Broiler Farms in Hathazari, Chittagong

Abstract

Sixty broiler chickens from sixty different small scale farms of Hathazari Upazilla under Chittagong district were studied for two month from 1st February to 29th of March 2018 to determine the prevalence of Infectious Bursal Disease (IBD). On the basis of clinical history and post-mortem lesions, the overall prevalence of IBD in Hathazari Upazilla was 23.33% where highest prevalence was observed in Katirhat area (40%). The major necropsy lesions were observed in the bursa of Fabricious which appeared inflamed, edematous, swollen, hemorrhagic and atrophied. Age related analysis revealed, the 20-35 days aged birds were highly susceptible to IBD (33.33%) followed by 10-19 days aged birds (15.79%) and 1-9 days aged birds (0.00%). Vaccination history medicates the effect of vaccination against IBD was useful as the prevalence of IBD in non-vaccinated and vaccinated birds were 80% and 4.44% respectively. Strong statistical correlation (P=0.018) was observed between insufficient bio-security and IBD infection in broiler farms. This preliminary study medicates the security of IBD in study areas requiring proper control and prevention steps.