Isolation and characterization of avian influenza (H9N2) virus from an outbreak at poultry farms in Karachi [Pakistan]
2001
Muneer, M.A. | Bahram, A.M. | Munir, Z. | Hussain, I. | Muhammad, K. | Rabbani, M. | Akhtar, S. | Aleem, M. (Coll. of Veterinary Sciences, Lahore (Pakistan). Microbiology Section) | Sultan, B. | Tariq, M.A. | Naeem, K.
Avian influenza virus (AIV) type H9 N2, was isolated from poultry flocks which were suffering from acute respiratory illness in Karachi area. High haemagglutination inhibition (HI) titers. against AIV virus type H9 N2. ranging from 6.38 to 7.81, in the convalescent sera of birds were demonstrated. The infected flocks had mortality between 30 to 80 per cent. Those flocks also had considerable of HI titres against infectious bronchitis (IB) virus stains D274 and D 1466, against which they were never vaccinated. It is believed that AI H9 N2 virus in collaboration with IBV and some unidentified bacterial species caused high mortality in the infected flocks.
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