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.
Low Prevalence of Listeria monocytogenes in Cull Sows and Pork
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IRENE V. WESLEY, STEVEN LARSEN, H. SCOTT HURD, JAMES D. McKEAN, RONALD GRIFFITH, FERNANDO RIVERA, RAMAKRISHNA NANNAPANENI, MANDY COX, MICHAEL JOHNSON, DEAN WAGNER, MARY de MARTINO; Low Prevalence of Listeria monocytogenes in Cull Sows and Pork. J Food Prot 1 March 2008; 71 (3): 545–549. doi: https://doi.org/10.4315/0362-028X-71.3.545
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