Listeria prevalence and Listeria monocytogenes serovar diversity at cull cow and bull processing plants in the UNITED STATES - (Journal of Food Protection®)
November 21, 2007 – 8:28 pmABSTRACT: Listeria monocytogenes , the causative agent of epidemic and sporadic listeriosis, is routinely isolated from many sources, including cattle, yet information on the prevalence of Listeria in beef processing plants in the United States is minimal. From July 2005 through April 2006, four commercial cow and bull processing plants were sampled in the United States to determine the prevalence of Listeria and the serovar diversity of L. monocytogenes .
Samples were collected during the summer, fall, winter, and spring. Listeria prevalence on hides was consistently higher during cooler weather (28 to 92% of samples) than during warmer weather (6 and 77% of samples). The Listeria prevalence data collected from preevisceration carcass ranged from undetectable in some warm season samples to as high as 71% during cooler weather.
Listeria on postintervention carcasses in the chill cooler was normally undetectable, with the exception of summer and spring samples from one plant […]
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