While this process area was shut down, a large refrigerator unit was removed from the ceiling, cut into pieces due to its large size, and removed from the building. It is believed that this generated airborne dust particles contaminated with Listeria which ultimately contaminated production equipment. There are several strategies that food processors can implement to reduce the possibility of Listeria contamination. The design and operation of a processing plant should not allow the entrance of animals, insects, or dust, nor should it allow raw product to cross-contaminate finished product. Food preservatives, such as potassium sorbate and sodium benzoate have been recommended to inhibit the growth of L. monocytogenes .
Sanitation is also an extremely important component to the control of Listeria .
A comprehensive cleaning and sanitation program must be established within the processing plant facility. Finally, food processors must have a complete quality assurance program that includes microbiological monitoring of the products as well as the environment. At Biosan Laboratories, Inc., we offer a variety of microbiological testing services and products to support food processors in their endeavor to produce safe foods.