Volume: 55 Issue: 2
Year: 2024, Page: 394-401, Doi: https://doi.org/10.51966/jvas.2024.55.2.394-401
Received: Oct. 27, 2023 Accepted: Jan. 17, 2024 Published: June 30, 2024
The current study was conducted with the objective of determining the cause for a significant increase in mortality rates in poultry farms situated in and around Thrissur. The study material consisted of 100 birds aged between two and four months, which were brought for postmortem to the Department of Veterinary Pathology, College of Veterinary and Animal Sciences, Mannuthy. The birds with a history of respiratory illness were included in the study. On detailed postmortem examination, catarrhal or caseous exudate in the trachea/nasal passages, pulmonary congestion, swollen and pale kidneys, splenomegaly with congestion were noticed in cases suspected for infectious bronchitis (IB) infection alone. Enlarged and congested kidneys; enlarged bursa with cheesy material inside the lumen and splenomegaly with subcapsular haemorrhages were noticed in carcasses suspected for concurrent infection with infectious bursal disease (IBD). On microscopic examination, bursa of IB infection alone revealed densely populated lymphocytes with necrotic changes in the medulla and bursa of concurrent infection with IBD revealed extensive haemorrhage in the cortical region and large cyst in the medulla of the plicae. The cases were confirmed using a reverse transcriptase polymerase chain reaction (RT-PCR). Out of 100 samples, 33 cases tested positive for IB. Upon further investigation of these 33 samples, 25 samples were found to be concurrently infected with IBD. The condition was confirmed as infectious bronchitis with concurrent infection with infectious bursal disease based on both pathological findings and molecular analysis.
Keywords: Pathology, Infectious bronchitis, concurrent infection, molecular detection
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© 2024 Kishore Gopal et al. This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Kishore Gopal, A. G., Krithiga, K., Prasanna, K. S., Divya, C., Anoopraj, R., Surya Sankar, Sajitha, I. S. and Devi, S. S. 2024. Pathological changes and molecular detection of infectious bronchitis and concurrent infection with infectious bursal disease in poultry. J. Vet. Anim. Sci. 55(2): 394-401
DOI: https://doi.org/10.51966/jvas.2024.55.2.394-401