Vol. 11, Special Issue 11 (2022)

Author(s):
Nayanjyoti Pathak, Biswajit Dutta, Purabi Deka, Sanjib Khargharia, Gautam Bordoloi, Mridu Pavan Baishya, Aditya Baruah, Prasanta Kr. Boro and Manoj Kumar Kalita

Abstract:
Infectious bursal disease is one of the most important immunosuppressive disease of fowl which is considered as the leading cause of economic losses in the poultry industry. Post-mortem examination of two numbers of 37 days old dual chicken variety Kamrupa bird was conducted in the Department of Veterinary Pathology, with clinical history of diarrhoea, anorexia, reluctance to move, drowsiness and death. Externally the carcasses showed soiled vent and dehydration. Internally haemorrhages were seen in the thigh muscle, bursa, spleen, mucosa of the proventriculus and its gland. The enlarged bursa and proventriculus also showed congestion. Microscopic examination of the bursa of Fabricius revealed focal eosinophilic necrotic areas along with interfollicular and intrafollicular haemorrhages and formation of cystic cavities.