Monitoring changes in association between salmonella-serology and microbiology over time
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The SafePork conference series began in 1996 to bring together international researchers, industry, and government agencies to discuss current Salmonella research and identify research needs pertaining to both pig and pork production. In subsequent years topics of research presented at these conferences expanded to include other chemical and biological hazards to pig and pork production.
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Abstract
We found a strong correlation between seroprevalence in finishing herds and the number of positive pen samples in pig herds in level 2 or 3 in the Danish Salmonella Surveillance program. Several times during the period we observed, that the association, although always present, changed from one month to the following month. We found indications of a seasonality in the association, indicating, that late winter we would isolate more Salmonella for a given seroprevalence compared to late summer. Herds using home-mixed meal feed had less positive pen faecal samples for a given seroprevalence than herds using pelleted, purchased feed.