So, yes indeed we are now seeing more outbreaks and fewer cases per outbreak, but what we didn’t expect to see was such a long span of time of illness onset. This could mean that some meat processing facilities have harborages of Listeria monocytogenes in equipment or infrastructure and that its periodically getting into product. Some people like to call these, “house pets,” but they are not the friendly kind, as there’s nothing good about persistent Listeria monocytogenes in food processing plants and the same strain can reside in plants for years if not eliminated.
There are tried and true techniques to mitigate such contamination and provide effective measures to control this pathogen in meat processing plants. Get your people trained at the Listeria Control Workshop by the North American Meat Institute, and get help from experts if needed.