Impact of BCG Vaccination on Productive Performance and Immune Response To avian Influenza Vaccine in Two Breeds of Ducks

The present study was conducted on A total of 200 unsexed day old ducklings of two breeds of ducks, Peckin and Cherry valley ducks each breed subdivided into BCG vaccinated group (50 ducklings) and control non vaccinated one (50 ducklings). All ducklings were vaccinated with both Avian Influenza and BCG vaccine at 14 days of age. Body weights, body weight gain and immune response were measured for BCG th injected group and the control one. The results were showed that, the Cherry valley duck was significantly higher than Peckin duck in both initial body weight and body weight gain during the first period (0-2 weeks of age). Also, Cherry valley ducks were significantly higher in final body weight than Peckin. But, Peckin ducks were significantly higher at second week of age than Cherry valley one. BCG vaccine was expressed its effect on body weight by a significant reduction in body weight at 4 and 6 weeks of age, but, body weight at other th th ages and body weight gain at all periods were non-significant. The interaction between BCG and breed revealed that body weight and body weight gain were significantly lower in BCG vaccinated Peckin ducks at 8 week th