Infectious Bursal Disease Outbreak in Fifteen Weeks Old Pullets in Kaduna, Nigeria
Journal Title: Journal of Animal Production Advances - Year 2015, Vol 5, Issue 3
Abstract
A case of infectious bursal disease outbreak in a flock of 100 Dominant black pullets, age 15-weeks, raise under intensive management system on a deep litter at a backyard farm. History revealed that the birds were vaccinated against Infectious bursal disease at one and three weeks of age using unidentified foreign Infectious bursal disease vaccine. An unidentified dose of Virucine (R) solution was added to the vaccine mixture. Infectious bursal disease was diagnosed base on clinical signs, postmortem findings, histopathological studies of the bursa of Fabricius and agar gel immunodiffusion test. The clinical signs observed on the sick birds in the farm include diarrhea, somnolence and anorexia. The disease ran a three day course with a mortality pattern of 2, on the first day; then 17 on the second day, and 5 on the third day. Necropsy findings showed echymotic to diffuse hemorrhages on the pectoral muscles, the bursa of Fabricius was enlarged, edematous and turgid, the kidneys were enlarged while the cloacae was swollen and filled with whitish to yellowish feces. Histopathological lesions in the bursae of Fabricius showed areas of cystic formation, interfollicular fibrosis and degeneration of the follicles. The bursae of Fabricius of the dead chickens were confirmed positive for Infectious bursal disease viral antigens by Agar gel immunodiffusion test. It was concluded that Infectious bursal disease, commonly observed in young birds of age between 3-6 weeks old was reported in growers of 15 weeks old in this study.
Authors and Affiliations
A. Shekaro , I. E. Josiah
Keywords
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