Submitted to: United States Animal Health Association Proceedings
Publication Type: Proceedings
Publication Acceptance Date: 10/18/1996
Publication Date: N/A
Technical Abstract: The USDA:APHIS:Veterinary Service conducted a study of the health and management of grower/finisher swine as part of the National Animal Health Monitoring System's (NAHMS) Swine 95 Survey. A stratified random sample of producers from the 16 major swine producing states was selected for the study. Of the 418 farms participating in the 95 study, 152 farms participated in the fecal collection and 300 farms participated in the fee collection for Salmonella. A total of 6,655 fecal samples were cultured for Salmonella. The sample and herd prevalence rates were 6.0% (398/6,655 positive) and 38.2% (58/152 positive), respectively. The five most common serotypes recovered were S. derby (32.3%), S. agona (13.0%), S. typhimurium (copenhagen) (11.3%), S. brandenburg (7.7%), and S. mbandaka (7.7%). Among the positive farms (n=58), 15.8% were positive for S. derby while 6.6% were positive for S. agona. The most common serogroup recovered was B (72.7%) followed by C1 (11.1%). A total of 1,477 feed samples were cultured for Salmonella. The sample and herd prevalence rates were 1.5% (22/1,477 positive) and 5.7% (17/300 positive), respectively. The four most common serotypes recovered were S. amsterdam (12.0%), S. infantis (8.0%), S. senftenberg (8.0%), and S. untypable (8.0%). The most common serogroup recovered was C1 (28.0%) followed by E1 (20.0%). Eight of the 20 serotypes recovered from the feed matched those serotypes recovered from the feces and included S. havana, S. infantis, S. livingstone, S. mbandaka, S. seftenberg, S. tennessee, S. typhimurium (copenhagen), and S. untypable.