Vol. 12, Special Issue 12 (2023)

Author(s):
Dr. Udaya Sai Sitaram Tella, Dr. Mridusmrita Buragohain, Dr. Abhijit Deka, Dr. Sravan Kumar Reddy, Dr. AN Prakash, Dr. A Avinash, Dr. Rakesh Saindla, Dr. I Karthik, Dr. Nitumoni gogoi, Dr. Pongkhi Saikia and K Sujitha Reddy

Abstract:
The case was seen in the age group of 5^th week with a mortality of 48% in a period of ten days to post infection which attain peak mortality on its 5^th day and decline gradually on the study. The most typical signs exhibited by the affected flocks were acute onset of depression, dullness, dehydration, ruffled feathers on back on neck, praying position on ground and anorexia. On necropsy most of the carcasses showed dark discoloration of thigh and pectoral musculature with paint brush hemorrhages on the breast and thigh muscles. Microscopic examination of bursa revealed complete lymphoid depletion leading to formation of cysts filled with heterophils and exudates and extensive hemorrhages in interfolicular tissue. Confirmatory diagnosis of virus was done by RT-PCR.