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Efficacy Of Different Vaccination Programs Of Live 4/91 Strain Against Thai Qx-Like Infectious Bronchitis Virus In Broiler Chickens, Tawatchai Pohuang, Sarawut Tanasatian, Jiroj Sasipreeyajan
Efficacy Of Different Vaccination Programs Of Live 4/91 Strain Against Thai Qx-Like Infectious Bronchitis Virus In Broiler Chickens, Tawatchai Pohuang, Sarawut Tanasatian, Jiroj Sasipreeyajan
The Thai Journal of Veterinary Medicine
Thai QX-like infectious bronchitis virus (IBV) has caused problems in commercial chicken farms as well as small farms in many parts of Thailand. This study investigated the level of protection generated by vaccination with different IBV vaccination programs, 4/91 strain against Thai QX-like IBV. One hundred 1 day old female broiler chickens were randomly divided into 5 groups of 20 chickens each. The chickens in Group 1 were vaccinated with Ma5 strain IBV vaccine at 1 day old and with 4/91 strain IBV vaccine at 14 days old. The chickens in Group 2 were vaccinated with Ma5 and simultaneously with …