Table 1.

Involvement of the environment and the industrial surfaces on the cross-contamination of food-products by Listeria monocytogenes.

Implicated Food Product	Type of Industry	Country	Surface x	Reference
Pasteurized milk cheese	Cheese retailers and cheese processing plant	Canada	Knives, cutting boards, counters, cheese plates, packers, refrigerator handles, brine solution	[25]
Raw and cooked meat of blue crab	Meat processing plants	USA	Floor drain, raw crab cooler, receiving dock, gloves, table	[26]
Whole whitefish, whole salmon and salmon fillet	Smoked fish processing plant	USA	Floors, drains, cutting table, fork truck bars, carts, coolers, trash can, slicer	[26]
Cantaloupe	Cantaloupe farm and processing plant	USA	Cooler, truck, downstream equipment	[27]
Ice cream	Ice cream facilities	USA	Floor, drain	[28]
Pecorino Romano PDO and ricotta salata cheese made from pasteurized or thermized sheep milk	Sheep’s cheese making plants	Italy	Molds, filters, floors, drains, tables, conveyor belts, shelves, washing machines	[29]
Ricotta salata made from pasteurized sheep’s milk	Semi-finished cheeses processing plant	Italy	Washing machine’s brush, manhole, knife, cutting machine, table, floor, trolley shelf	[30]
Raw pork pieces and minced meat samples	Open meat markets	China	Meat mincers, cutting tables and weighing scales.	[31]
Raw pork	Meat retail market	China	Chopping boards and knives, the inner and outer surfaces of chest freezers, meat mincers, hands of people, floors and walls	[32]
Chilled roasted pork meat	Minced meat factory	Spain	Oven cart, larding needles	[33]
Plastic-packaged RTE Meatballs	RTE meat production facility	Germany	Conveyor belts, pulleys, freezers, condensate lines or cable ducts, gullies	[34]

^x The type of material that surfaces were made of was included in the search but was not found in the studies analyzed.