Salmonella prevalence in pigs reared on farms with and without antimicrobials

Peter B. Bahnson, Wondwossen A. Gebreyes, Julie A. Funk, W. E. Morgan Morrow
2005 International Conference on the Epidemiology and Control of Biological, Chemical and Physical Hazards in Pigs and Pork   unpublished
A convenience sample of farms using antimicrobials (antimicrobial-using, AMU) postweaning for therapy and/or growth promotion (n=21) were contrasted to a convenience sample of farms not using antimicrobials post-weaning (antimicrobial-free, AMF, n=21) distributed across three US geographic areas. Fecal samples were screened for Salmonella enterica prior to slaughter and carcasses were tested after slaughter. Fecal samples were collected from 30 pigs per farm. At slaughter, 10 carcasses were
more » ... carcasses were swabbed at each of three locations on the processing chain. Salmonella spp. were isolated using conventional methods. The proportion of Salmonella positive fecal samples among AMF farms was higher (27.3%, CI 12.8-41.8%) when compared with AMU farms (12.3%, CI 5.0-19.5%). No differences were found among carcass swabs or antibiograms. It is concluded that AMF production may not enhance Salmonella food safety in the pork chain.
doi:10.31274/safepork-180809-758 fatcat:cyybpg3uj5fuvhgd7h6rdb62ki