Simoultaneous administration of Transmune® Gumboro and killed Newcastle vaccines in hatchery and its effect on antibody titer against Newcastle vaccine in broiler chickens

In recent years, the simultaneous administration of two or more vaccines in hatchery has been applied for increasing immunity to avian pathogens. This study was conducted to evaluate the effect of hatchery administration of immune-complex infectious bursal disease vaccine (Transmune IBD Vaccine, Ceva) on the immune response of broiler chickens induced Newcastle disease (ND) vaccine. For this, 150 broiler chicks were divided into three groups. In the chicks in group 1, received a spray of live H120 B1 (Vitabron Ceva) and a subcutaneous injection of inactivated ND vaccines in hatchery. The chicks in group 2, were vaccinated against ND in the same manner as those in group 1, but immunized against IBD with Transmiun IBD vaccine in hatchery. The chicks in group 3, were vaccinated against ND and IBD vaccines only in hatchery in the same manner as those in group 2. All chicks from each group were beld on days 1, 14, 28 and 42 and the collected sere were assayed for ND-specific haemagglutination-inhibiting (HI) antibody. The results revealed that chickens vaccinated with immune-complex IBD vaccine in hatchery had lower HI titer at 28 days old, significantly (p