Serological research of Salmonella on Belgian pig farms

Date
2003-01-01
Authors
Huysmans, K.
Nollet, Nathalie
Vandebroeck, M.
Desmedt, K.
Greers, Rony
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Abstract

Risk factors for Salmonellosis in pigs were investigated in a cross-sectional study on 144 Belgian farrow-to-finish herds belonging to one slaughterhouse co-operation. Herd data were collected using a questionnaire. The blood samples were serologically analyzed. Variables significantly related to the Salmonella prevalence in the univariate analyses were subsequently analysed in a multivariate model. Furthermore, the clustering of Salmonella infection within the herd, section and pen was studied. The average within-herd seroprevalence was: 73.4% when using OD 10%. In the multivariate analyses the structure of the feed seems to be the most important factor of the model with five factors. Feeding pigs meal instead of granulated or crumb is a protecting factor for Salmonella. Other risk factors in the multivariate model are natural ventilation, less then 3 days emptiness after wet cleansing, not dry cleansing of sows’ pen before wet cleansing and the absence of dogs in the pig houses.

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