Submitted to: International Virtual Conference on Infectious Diseases of Animals
Publication Type: Abstract Only
Publication Acceptance Date: 5/2/1997
Publication Date: N/A
Citation: Interpretive Summary:
Technical Abstract: The USDA:Animal and Plant Health Inspection Service (APHIS):Veterinary Service (VS) 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 with grower/finisher pigs from the major swine producing states were selected for the study. Of the 418 farms participating in the 95 study, 300 farms participated in the feed collection for Salmonella. From each farm, a maximum of 7 100-gram samples of finisher feed were collected from bins prior to presentation to the finishing hogs. Approximately 10 g of feed from each of 5 samples (2 samples were used for mycotoxin testing) were cultured for Salmonella. A total of 1,477 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 total number of isolates recovered was 25 (3 kits had 2 serotypes). Twenty different serotypes were identified. 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%). Recovery from all other serogroups was 8% or less. 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.