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SEROMONITORING OF AVIAN INFLUENZA H9 SUBTYPE IN BREEDERS AND COMMERCIAL LAYER FLOCKS
M. Numan, M. Siddique and M. S. Yousaf1

Department of Veterinary Microbiology,
1Department of Physiology and Pharmacology, University of Agriculture, Faisalabad-38040, Pakistan

Abstract

        A serological survey for detection of antibodies against avian influenza virus (AIV) subtype H9 in vaccinated layer flocks was carried out. Serum samples were divided into age groups A, B, C, D (commercial layers) and E, F, G, H (layer breeders). Haemagglutination inhibition (HI) test was performed to determine serum antibodies against AIV-H9 subtype. Geometric mean titer (GMT) values were calculated. Results showed the level of protection of vaccinated birds was satisfactory.

Key words: Avian influenza virus, subtype H9, serum antibodies, Haemagglutination inhibition.
 
   

ISSN 0253-8318 (Print)
ISSN 2074-7764 (Online)



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