ARS | Publication request: SALMONELLA SEROTYPES AND ANTIMICROBIC SUSCEPTIBILITY PATTERNS IN US DAIRY COWS ON-FARM AND AT MARKETS

Submitted to: Research Workers in Animal Diseases Conference Proceedings
Publication Type: Abstract Only
Publication Acceptance Date: October 13, 1999
Publication Date: November 7, 1999
Citation: Wells, S.J., Cray, P.J., Dargatz, D.A., Ferris, K. 1999. Salmonella serotypes and antimicrobic susceptibility patterns in us dairy cows on-farm and at markets. Research Workers in Animal Diseases Conference Proceedings. Abstract . 75.

Technical Abstract: The objective of this study was to compare serotype and antimicrobic susceptibility patterns of Salmonella isolates from milking cows on-farm and culled dairy cows at markets. Fecal samples were collected from cows from 91 dairy operations and 97 cull dairy cow markets across the U.S., as part of a National Animal Health Monitoring System study of the U.S. dairy cow population. Overall, Salmonella spp. isolates were recovered from 5% of milk cows and 15% of culled dairy cows at markets. The most common Salmonella serogroups were E, C1, K, C2, and B; the most common serotypes were S. Montevidoe, S. Cerro, S. Kentucky, S. Menhaden, and S. anatum. A majority of isolates were susceptible to all 17 antimicrobics evaluated, though variation by serotype was observed. These patterns differ from Salmonella isolates previously reported from dairy calves and those from diagnostic laboratory origin.