FAILURE OF VACCINES TO PROTECT SALMON FROM VIBRIOSIS ENZOOTIC IN PUGET SOUND, WASHINGTON

Abstract

Juvenile chinook salmon in fresh water were vaccinated orally or parenterally with heat- or formalin-killed bacterins prepared with Vibrio anguillarum. Subsequent exposure to naturally occurring vibriosis in the marine waters of Puget Sound (Washington State [USA]) indicated that no protection resulted. Protection could be achieved with the passive transfer of immune serum.