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bovine vibriosis vaccination: immunity conferred by a single biotype.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 ...1977612317
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