M. Salahuddin1 , T. M. Chaudhry1 , Nadeem Yaqoob1 , Asma Ashraf1 , Shazia Khaliq1 and Fuad Shah
Abstract
The present study was conducted to evaluate the efficacy of NIAB ANGARA vaccine under field conditions. For this purpose 2000
broiler chicks were vaccinated against Newcastle disease (ND) and Infectious Bursal disease (IBD). NIAB ANGARA vaccine was
injected to 1000 broilers on 30th day of age. When the flock showed 5 to 10 mortalities per day, HPS was suspected in post mortem
reports. Remaining 1000 broilers were kept as control. Seventy to eighty birds died in treated group within 2-3 days after vaccination
then mortalities reduced to 1 and 2 birds per day. Flock became normal after 7th day of vaccination, whereas mortalities increased
slowly and remained high in control group. Blood samples were collected from birds of treated and control groups on 37th and 44th day
of age. Antibody titer against HPS vaccine was determined by Indirect Haemagglutination test. Results showed that NIAB ANGARA
vaccine triggered the production of antibodies against HPS virus. The treated flock recovered from the disease within a week.
