PREVALENCE OF INFECTIOUS BURSAL DISEASE IN BROILER IN DISTRICT PESHAWAR

Fifty broiler farms of district Peshawar suspected for infectious bursal disease (IBD) were studied during the period of 25 th September to 20 th October 2007. On the basis of history and detailed postmortem pathological lesions, the prevalence of IBD in district Peshawar was 7.75% and was highest in town 3 of Peshawar district (8.085%). The mortality and morbidity rates were found to be 6.38% and 1.35%, respectively. In district Peshawar the highest mortality rate was recorded in town 1 of district Peshawar with 7.037% and morbidity was highest in town 2 with 1.847%. The major macroscopic lesions observed in this study were hemorrhages on thigh and breast muscles, kidneys were found swollen and principal lesions were in the bursa of fabricious which appeared inflamed, edematous, hyperemic and finally hemorrhagic and atrophied. Four weeks old broilers were highly susceptible to IBD (38%) followed by 3 rd week (28%) and 5 th week (28%) and no clinical case was found positive for IBD in first two weeks of age.