Diversity of Salmonella serotypes in cull (market) dairy cows at slaughter

John C. Galland, H. Fred Troutt, Robert L. Brewer, Bennie Osburn, R. Kenneth Braun, Phil Sears, John A. Schmitz, Asa B. Childers, Ed Richey, Kris Murthy, Edward Mather, Michael Gibson

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

Objective - To determine the diversity of Salmonella serotypes isolated from a large population of cull (market) dairy cows at slaughter. Design - Cross-sectional study. Sample Population - Salmonella organisms isolated from the cecal-colon contents of 5,087 market dairy cows. Procedure - During winter and summer 1996, cecal-colon contents of cull dairy cows at slaughter were obtained from 5 US slaughter establishments. Specimens were subjected to microbiologic culturing for Salmonella spp at 1 laboratory. Identified isolates were compared with Salmonella isolation lists published by the Centers for Disease Control and Prevention (CDC) and the National Veterinary Services Laboratory (NVSL) for approximately the same period. The Simpson diversity index was used to calculate the likelihood that Salmonella isolates selected randomly by establishment were different Results - Of 58 Salmonella serotypes identified, Salmonella ser. Montevideo was the most prevalent. Two of the top 10 CDC serotypes identified from humans in 1996, Salmonella ser. Typhimurium and S Montevideo, appeared on our top 10 list; 8 of the top 10 were found on NVSL listings. Thirty-one of 59 S Typhimurium isolates were identified as DT104 and found at a west slaughter establishment, 30 during the winter and 1 during the summer. The greatest diversity of serotypes was at a southeast establishment during the summer; the least diversity was at a central establishment in the winter. Conclusions and Clinical Relevance - 58 Salmonella serotypes were isolated from market dairy cows at slaughter and could pose a threat for food-borne illness. Salmonella Montevideo was the most frequently isolated serotype and may contribute substantially to salmonellosis in dairy cattle.

Original languageEnglish (US)
Pages (from-to)1216-1220
Number of pages5
JournalJournal of the American Veterinary Medical Association
Volume219
Issue number9
DOIs
StatePublished - Nov 1 2001

ASJC Scopus subject areas

  • veterinary(all)

Fingerprint Dive into the research topics of 'Diversity of Salmonella serotypes in cull (market) dairy cows at slaughter'. Together they form a unique fingerprint.

Cite this