Basic Aspects of In-ovo Injection in Commercial Hatcheries
نویسنده
چکیده
The In-Ovo vaccination was first proved to be efficient for Marek’s vaccine by experiments performed by Sharma and Burmester in 1982. These authors demonstrated that chicks vaccinated In-Ovo at 18 days of embryo development against Marek’s Disease had better protection against virulent MD challenge carried out at 3 days of age as compared to those chicks vaccinated at hatch. At seven days of age, the both groups (vaccinated at hatch or In-Ovo) induced equivalent level of protection.
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