Food Safety

The Prevalence of L. monocytogenes in Cull Sows

Authors
  • I. V. Wesley (United States Department of Agriculture)
  • S. T. Larsen (Iowa State University)
  • H. S. Hurd (United States Department of Agriculture)
  • James McKean (Iowa State University)
  • T. Frana (Iowa State University)
  • M. Cox (University of Arkansas at Fayetteville)
  • M. G. Johnson (University of Arkansas at Fayetteville)
  • R. Nannapaneni (University of Arkansas at Fayetteville)
  • A. Pinkerton-Hogness (United States Department of Agriculture)
  • F. Rivera (United States Department of Agriculture)

Abstract

The goal of this study was to determine the distribution of Listeria monocytogenes in cull sows and their pork. Two trials were conducted at a single packing plant in 2001 (n=179 cull sows) and in 2002 (n= 160 cull sows). Fecal samples collected antemortem (trial 1) as well as animal tissues, carcass, and environmental swabs, and meat block samples collected at the abattoir (trials 1 and 2) were analyzed. When results from both trials were combined, overall L. monocytogenes was detected in five or 0.17% of the total samples (n=2,858). Specifically, L. monocytogenes was confirmed in a tonsil sample (0.55% of tonsils positive) and in a carcass swab sample (0.56% of carcasses) before the organic acid rinse. L. monocytogenes was recovered in three (1.21%) meat block samples (n=213). These data indicate that L. monocytogenes is present in the cull sow and their pork.

Keywords: ASL R1809

How to Cite:

Wesley, I. V., Larsen, S. T., Hurd, H. S., McKean, J., Frana, T., Cox, M., Johnson, M. G., Nannapaneni, R., Pinkerton-Hogness, A. & Rivera, F., (2003) “The Prevalence of L. monocytogenes in Cull Sows”, Iowa State University Animal Industry Report 1(1).

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Published on
01 Jan 2003
Peer Reviewed