Efficacy of a bursal disease - Marek’s disease vaccine in broilers administered through in ovo vaccination

Tarcisio Villalobos, Alexandra Camacho, Carlos Zamora, Jose Elizondo, Rafael Fernández, Ricardo Bonilla

Two hundred twenty-five thousand, eighteen day-old embryonated commercial broiler eggs were injected in ovo with Bursal Disease - Marek’s Disease Vaccine Serotype 3 Live Virus (S-706 + HVT). The chickens were observed daily for forty-two days. Serological and production parameters were evaluated. The results were then compared against a control group (HVT in ovo + S-706 by spray at one day old). The results showed the safety and efficacy of in ovo vaccination with Bursal Disease - Marek’s Disease Vaccine Serotype 3, Live Virus was satisfactorily demonstrated in commercial broiler chickens.

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