ISOLATION AND CHARACTERIZATION OF AVIAN INFLUENZA (H9N2) VIRUS FROM AN OUTBREAK AT POULTRY FARMS IN KARACHI
oleh: Mohammad A. Muneer, Ali Mohammad Bahram, Zahid Munir, I. Hussain, K. Muhammad, Masood Rabbani, S. Akhtar, M. Aleem, Bakht Sultan1, Munir A. Tariq and K. Naeem2
| Format: | Article |
|---|---|
| Diterbitkan: | University of Agriculture, Faisalabad 2001-02-01 |
Deskripsi
Avian influenza virus (AIV) type H9N2 was isolated from poultry flocks which were suffering from acute respiratory illness in Karachi area. High haemagglutination inhibition (HI) titers against AIV virus type H9N2, 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 D1466, against which they were never vaccinated. It is believed that AI H9N2 virus in collaboration with IBV and some unidentified bacterial species caused high mortality in the infected flocks