Summary
Eleven groups of 8 pigs were vaccinated with different vaccinal strains of pseudorabies virus deleted or not for non-essential glycoproteins (gI, gX, gp 63), then were challenged 8–9 weeks later with a virulent strain. Antibodies against the major viral glycoproteins (gII, gIII, gp 50) were titrated at the day of challenge. Excretion of the challenge strain, growth performance of the pigs, and gI antibody responses from pigs vaccinated with a gI minus strain, were monitored after the challenge. The results demonstrated a strong association between gII and gIII antibody titres before the challenge, with the amount of the challenge strain excreted and clinical protection after the challenge. Furthermore, gI antibody titres after the challenge were negatively correlated with the level of gII and gIII antibodies at the day of challenge, the virus excretion and the clinical protection after the challenge. Implications of these results for vaccination of pigs and gI antibody screening for the infection are discussed.
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Eloit, M., Vannier, P., Hutet, E. et al. Correlation between gI, gII, gIII, and gp 50 antibodies and virus excretion in vaccinated pigs infected with pseudorabies virus. Archives of Virology 123, 135–143 (1992). https://doi.org/10.1007/BF01317144
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DOI: https://doi.org/10.1007/BF01317144