Pak Vet J,
ISOLATION AND CHARACTERIZATION OF AVIAN INFLUENZA
(H9N2) VIRUS FROM AN OUTBREAK AT POULTRY FARMS IN
Mohammad A. Muneer, Ali Mohammad Bahram, Zahid
Munir, I. Hussain, K. Muhammad, Masood Rabbani, S. Akhtar, M. Aleem, Bakht
Sultan1, MunirA. Tariq and K. Naeem2
Microbiology Section, College of Veterinary
Sciences, Lahore, 1Grand Parent Poultry Laboratory, Shadman,
Lahore, 2Microbiology Laboratory, Animal Sciences Institute,
NARC, Islamabad, Pakistan
Avian influenza virus (AIV) type H9 N2 was
isolated from poultry flocks which were suffering from acute respiratory illness
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
H9 N2 virus in collaboration with IBV and some unidentified bacterial species
caused high mortality in the infected flocks.
Avian influenza, Haemagglutination inhibition, Karachi.