Abstract
An adjuvant vaccine was prepared from an Australian isolate of Campy-lobacter fetus subsp fetus biotype intermedius and injected into 23 virgin Guernsey heifers. Ten nonvaccinated animals served as controls. When challenged by the intravaginal route with a culture of either the homologous strain or biotype venerealis, weekly swabs from the anterior vagina continued to yield either biotype in 8 of 10 nonvaccinates at 6 weeks as compared with 3 of 23 vaccinates. Serology in vaccinated heifers and rabbits showed that the vaccine produced high titres of antibody against both homologous and heterologous strains.
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