Cleaning floor drains is a traditionally unpleasant and complex task that tends to be neglected by cleaning staff.
Drains that remain uncleaned or that are poorly cleaned can become more unpleasant over time, making it almost certain that they will be ignored. As a result of this cycle of neglect, Listeria is frequently found in floor drains. Listeria present in drains may migrate from drains onto machinery and surfaces where food is processed and handled, thus contaminating the food itself.
Therefore,it needs to be eliminated from wet areas such as drains and refrigeration as it is capable of growth even at 5°C, andif present will repeatedly recontaminate connected rooms and equipment.