Field studies evaluating the direct, indirect, total, and overall efficacy of Streptococcus suis autogenous vaccine in nursery pigs.

Vaccine effectiveness (VE) was evaluated on a farrow-to-finish farm experiencing mortality due to Streptococcus suis. Direct, indirect, total, and overall vaccine effectiveness were analyzed by vaccinating only 75% of pigs in each litter. Cox's regression and logistic regression revealed total and overall VE to be 27% and 21%, respectively. [ABSTRACT FROM AUTHOR]

L'efficacité vaccinale (EV) a été évaluée dans une ferme de naissage-engraissage aux prises avec des mortalités causées par Streptococcus suis. L'efficacité vaccinale directe, indirecte, totale et globale ont été analysées en vaccinant seulement 75% des porcs dans chaque portée. La régression de Cox et la régression logistique ont révélé que l'EV totale et l'EV globale étaient de 27% et 21%, respectivement. [ABSTRACT FROM AUTHOR]

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