Infectious Bursal Diseases in Sonali Chicken in Joypurhat District of Bangladesh

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The study was designed to investigate prevalence and risk factors of Infectious Bursal Disease (IBD) in Sonali chicken in Joypurhat District of Bangladesh. Twenty-five sonali chicken farms with sum of 33,735 birds of various age groups from five different upazila were observed for Infectious Bursal Disease (IBD). The disease was diagnosed on the basis of history, clinical findings and postmortem lesions. The overall prevalence of IBD was 19.48% and mortality 5.85%. The highest prevalence 43.61% was significantly found (P<0.05) in Khetlal upazila and lowest 10.54% in kalai upazila. Chicken of 3 to 4 weeks age showed higher prevalence 21.68% than other age group. The prevalence was significantly higher in female 20.03% chicken than male 18.66%. Prevalence of IBD in sonali chicken was higher 46.15% in winter season and lowest 12.89% in rainy season. Vaccinated with AviPro® IB Ark (Elanco) significantly (P<0.05) reduces the prevalence and mortality rate of IBD. Prevalence was low in fumigated concrete farm. Treatment with a) Levofloxacine(10%) b) Vitamin-C (Ascorbic Acid-98%) c) Ph (Formic acid, Lactic acid, Propionic acid & HMTBa) d) Mollasses 5% e) Andopan significantly recovered the IBD infected chicken within 4±0.75 days. The necropsy findings of infected chicks revealed haemorrhages on thigh and breast muscles; enlarged, edematous, hyperemic and haemorrhagic Bursa of Fabricious followed by atrophy. In some cases, kidneys were found swollen. Therefore, it was concluded that susceptibility of chicks to IBD is influenced by its age, sex, season, vaccination and treatment with appropriate medicine have significant impact on Infectious Bursal Disease (IBD).