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  • Title: Effect of experimental infection with pseudorabies (Aujeszky's disease) virus on pigs with maternal immunity from vaccinated sows.
    Author: Andries K, Pensaert MB, Vandeputte J.
    Journal: Am J Vet Res; 1978 Aug; 39(8):1282-5. PubMed ID: 211882.
    Abstract:
    Live-virus and inactivated-virus vaccines were used to immunize sows against pseudorabies (Aujeszky's disease) virus. To test the efficacy of the vaccination, 53 pigs of different ages were taken from the 1st and the 2nd litters of vaccinated sows and placed separately in isolation units. The pigs were challenge exposed with virulent pseudorabies virus and examined for clinical signs, virus excretion, and serologic reaction. The challenge inoculum caused severe nervous or respiratory signs of disease in 12 of the 13 control pigs, with a mortality of 76%. The pigs from the 1st litters of sows vaccinated with the live-virus vaccine did not become sick, whereas 2 of the 9 pigs (22%) from the 2nd litters had clinical signs and died of pseudorabies. All pigs from sows vaccinated with the inactivated-virus vaccine remained healthy. The results of virus isolation from oronasal swabs, combined with the serotest results, indicated that challenge exposure of all except 1 of the pigs resulted in a subclinical infection with the formation of active immunity.
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