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Pig Journal Volume: 54
Publication date: November 2004

Refereed Section

PORCINE PROLIFERATIVE ENTEROPATHY IN HIGH HEALTH HERDS
C.A. Corzo, R. Friendship, C. Dewey and T. Blackwell

Abstract
The objective of this study was to examine the presence of porcine proliferative enteropathy (PPE) in a group of high-health breeding-stock herds. Blood samples from 20 grower-finisher pigs in each 28 herds enrolled in the Ontario Swine Health Information Plan (OSHIP) were tested for Lawsonia intracellularis (LI) antibodies with an indirect immunofluorescent antibody test (IFAT). Based on the OSHIP criteria for evaluating biosecurity, each herd obtained a numerical score. The relationship between the biosecurity score and within-herd PPE prevalence was assessed. A total of 301 (53.7%) serum samples out of 560 tested positive and 21 (75%) out of 28 herds were classified positive. No association was found between biosecurity score and within-herd PPE prevalence. Antibodies against LI were observed in breeding-stock herds with both high or moderate biosecurity scores.

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