Age related Salmonella sera-prevalence in 4-7 month old breeding animals, gilts and sows from Danish breeding and multiplying herds

摘要

From July 1998 through Nov 1999, 15 groups of 30 pigs (450 total) were randomly picked (each total group size = 185 pigs), double ear-tagged, individually fecal and blood sampled, and placed into one of 5 separate finishing facilities (3 groups per facility) within a vertically integrated pork production system. Fecal and blood sampling was continued on individually identified animals at approximate monthly intervals for 3 or 4 times with the last pre-harvest samples being collected 2 to 18 days prior to slaughter (9 day avg.).