Authors: Wesley, Irene V.¹; Larsen, Steven²; Hurd, H. Scott³; McKean, James D.³; Griffith, Ronald³; Rivera, Fernando⁴; Nannapaneni, Ramakrishna⁵; Cox, Mandy⁵; Johnson, Michael⁵; Wagner, Dean⁶; de Martino, Mary⁷

Source: Journal of Food Protection®, Volume 71, Number 3, March 2008 , pp. 545-549(5)

Publisher: International Association for Food Protection

Abstract:

The goal of this study was to determine the prevalence of Listeria monocytogenes in sows slaughtered at a single Midwestern plant on two occasions (trial 1, n = 179 sows; trial 2, n = 160 sows). Fecal samples collected antemortem (trial 1) as well as animal tissues, and carcass swabs collected at the abattoir (trials 1 and 2) were analyzed. Eight isolates of L. monocytogenes were recovered from five samples that represented 0.18% of the total samples (n = 2,775). In trial 1, L. monocytogenes was detected in a tonsil sample (0.6%; 1 positive of 181 tonsils), in a carcass (0.6%; 1 positive of 179 carcasses), which was sampled prior to the organic rinse, and in two chopped meat block samples (1.2%; 2 positive of 165 samples). In trial 2, L. monocytogenes was only detected in a single chopped meat block sample (0.15%; 1 positive of 688 total samples). These data indicate the low prevalence of L. monocytogenes in the cull sow.

Document Type: Research article

Affiliations: 1: U.S. Department of Agriculture-Agricultural Research Service-National Animal Disease Center, Ames, Iowa 50010, USA 2: National Pork Board, Des Moines, Iowa 50306, USA 3: College of Veterinary Medicine, Iowa State University, Ames, Iowa 50011, USA 4: College of Veterinary Medicine, University of Zuila, Maracaibo 4002-a, Venezuela 5: Food Science Department, University of Arkansas, Fayetteville, Arkansas 72701, USA 6: Minnesota Department of Agriculture, St. Paul, Minnesota 55107, USA 7: University Hygienics Laboratory, University of Iowa, Iowa City, Iowa 52242, USA

Publication date: 2008-03-01

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• By this author: Wesley, Irene V. ;  Larsen, Steven ;  Hurd, H. Scott ;  McKean, James D. ;  Griffith, Ronald ;  Rivera, Fernando ;  Nannapaneni, Ramakrishna ;  Cox, Mandy ;  Johnson, Michael ;  Wagner, Dean ;  de Martino, Mary

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