Diagnosis of infectious bronchitis in avian
https://doi.org/10.52419/issn2072-2419.2026.1.479
Abstract
Infectious bronchitis of chickens causes enormous economic damage to poultry farming, which consists of poultry deaths, decreased egg productivity, decreased body weight gain, low feed conversion, etc. IB of chickens often occurs in association with other viral infections, and the course is always complicated by signs of secondary bacterial infection. There are more than 100 serotypes of the IB of chicken’s virus, the appearance of which is due to changes as a result of point mutations in the S1 gene subunit of the S protein, which lead to the emergence of new properties in the field virus. Moreover, acquired immunity to one serotype often does not provide protection against infections with other serotypes of the IB of chicken’s virus. To detect antibodies to certain serotypes of the IB of chicken’s virus. To isolate the IB of chickens virus, 3-4 passages are carried out on 9-10 day-old chicken embryos by infection into the allontoid cavity, but the associated course of IBC with other viral infections, the appearance of new variants and strains of the virus makes it difficult to conduct diagnostic studies using classical methods, while the use of RT-PCR followed by sequencing of the nucleotide sequence of the S1 gene of the IBC virus makes it possible to identify and differentiate the pathogen, which is important for the prevention of this disease. In case of IBD in the household, timely diagnostic, therapeutic, preventive measures should be carried out using specific preventive measures. The combined use of live and inactivated vaccines ensures the formation of a stable immune response sufficient to protect livestock from the field virus throughout the productive period.
About the Authors
S. R. Abgaryan
Saint Petersburg State University of Veterinary Medicine
Russian Federation
Russian Federation
PhD of Veterinary Sciences
E. I. Prikhodko
Saint Petersburg State University of Veterinary Medicine
Russian Federation
Russian Federation
PhD of Veterinary Sciences
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Review
For citations:
Abgaryan S.R., Prikhodko E.I. Diagnosis of infectious bronchitis in avian. International Journal of Veterinary Medicine. 2026;(1):479-485. (In Russ.) https://doi.org/10.52419/issn2072-2419.2026.1.479
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