Transfer of antibodies elicited by baculovirus-derived VP2 of a very virulent bursal disease virus strain to progeny of commercial breeder chickens.

A baculovirus-derived recombinant VP2 (rVP2) subunit vaccine elicited anti-infectious bursal disease virus (IBDV) antibodies in commercial flocks. The induced antibody levels were similar to those evoked against IBDV by a commercial vaccine. The levels remained higher than that of the negative controls for at least four and a half months in commercial chickens.