This product has been shown to be effective for the vaccination of healthy ewes against Ovine Genital Campylobacteriosis (vibriosis) caused by Campylobacter fetus and Campylobacter Jejuni. Inject 5 ml subcutaneously in the fold of the skin behind the axillary space, shortly before breeding. Repeat in 60 to 90 days. Historically, annual revaccination is recommended.