Field Experience Of Vaccination At Day-Old Of Broiler Chickens With A Herpesvirus Turkey - Infectious Bursal Disease (HVT-IBD) Vector Vaccine In Different Systems Of Chicken Production Across China

Tang Shun Fa, He Shi Jun, Li Wan Meng & Lemiere Stephane


Standard white broilers as well as colored broilers were included in big-scale field trials of HVT-IBD vector vaccine efficacy across China. Parameters of monitoring were IBD ELISA serology, bursa weight, bursa to bodyweight ratio. Growing performances, as final bodyweight, age at slaughter, feed conversion rate, mortality were recorded throughout the observation periods. Increased performances, as compared to traditional live IBD vaccine programs, were shown.