Clinicopathological Effects of Infectious Bursal Disease on Broilers

One hundred and ten, one day old, Hubbard chicks were divided into four groups. Gp.(1) was the control (20 bird). Gp.(2) was vaccinated at the ages of 8 days (by Nobilis Strain D78) and 18 days (by IBD BLEN) via the ocular route of 20 birds. Gp.(3) was inThe signs included anorexia, depression, ruffled feathers, trembling, prostration, fever and watery whitish diarrhea on the 2nd, 4th and 6th days post-infection (PI) in gps.(3&4). The mortality rate was 17.5% in gp.(3) and 10% in gp.(4). Most birds, which