The problem was discovered through microbiological testing by the Canadian Food Inspection Agency. A traceback investigation and follow-up testing by FDA at the facility determined there was potential cross contamination of products with listeria monocytogenes from product contact surfaces.
FSIS and the company have not received reports of illnesses due to consumption of these products. The products were distributed to retailers and distributors in Alabama, Arkansas, Colorado, Florida, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Michigan, Minnesota, Mississippi, Missouri, Nebraska, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Pennsylvania, Tennessee, Texas, Virginia, Wisconsin, and Wyoming.
(Story from myhighplains.com)