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OJVRTM
Online Journal of Veterinary Research©
Volume 16 (3):232-239, 2012. Extensively Redacted 2017.


Effect of experimental bursal disease infection in chickens on humoral responses to a challenge with avian influenza virus subtype H9N2.

 

  Motamed N DVM1, Mayahi M DVM PhD2, Seifi MR DVM PhD.3

 

12 Poultry Research Center and 3Department of Pathobiology, School of Veterinary Medicine, Shahid chamran University, Ahvaz, Iran.

 

ABSTRACT

 

Motamed N, Mayahi M, Seifi MR, Effect of experimental bursal disease infection in chickens on humoral responses to a challenge with avian influenza virus subtype H9N2. Onl J Vet Res, 16 (3):232-239, 2012. One day old chicks were infected via intranasal and intraocular routes with 103 CID50 bursal virus (IBDV), and at 30 days with 106 EID50 avian influenza virus (AIV) H9N2. Another group was infected with AIV only and controls were not infected. Sera was tested for AIV antibody by hem-agglutination inhibition test (HI). Symptoms and mortality was enhanced in birds infected with both viruses. Infection by IBD suppressed H9N2 antibody in birds with both viruses. Birds shed virus from trachea and cloaca for longer periods in birds infected by both viruses. A previous history of IBDV infection in chickens may induce susceptibility to avian influenza virus infection and pathology by LPAI viruses.

 

Key words: Infectious bursal disease, Avian influenza, Virus shedding, broiler chickens


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