ASSESSMENT OF VACCINATION PROGRAMS AGAINST AVIAN INFLUENZA DISEASE IN SOME BROILER FARMS IN QALYUBIA GOVERNORATE

Sabry, E.O.a, Arafa, A.S.b, El-Shorbagy, M.A.c, Lamya A.F. Attiad

Abstract


The aim of the present work was to describe the serological responses (haemagglutination inhibition antibody titer) of broiler flocks vaccinated with H5N1 or H5N2 AI vaccines. This study also throws the light on the recommended AI vaccination program in broiler farms in Egypt. We tested four commercial inactivated oil emulsion-adjuvant H5 avian influenza vaccines that had been used at broiler farms in Egypt, Nobilis Influenza H5N2, YEBIO inactivated H5N2, YEBIO H5N1-RE-1 and HARBIN H5N1 Re-5. All vaccines were given in a dose of 0.5 ml /bird subcutaneously at different age of vaccination (10-15 day old). The blood samples were collected from 62 broiler farms (31 farms vaccinated with H5N1 vaccines and 31 farms vaccinated with H5N2 vaccines at different ages of vaccination). The blood samples were collected on the 30th day post vaccination. It can be concluded that, vaccination of broilers with H5 AI vaccines at a later age (15-day old) seems to be a valuable recommendation. It is highly recommended to use H5N1 AI vaccines in vaccination programs at broiler farms in Egypt.

Key words


Avian Influenza, Broilers, Haemagglutination inhibition, Vaccination

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