These bacteria could easily have been transferred to food. This points out the need for wearing clean clothes and clean aprons every day. If your clothes or apron get dirty during the day, change them. Cutting boards are another source of bacteria and should be washed thoroughly after each use. Do not use wooden cutting boards.
Bacteria can hide in the wood fiber, making their complete removal impossible.
If you use cutting boards or utensils on raw food, don't use them to hold, serve, prepare or carve cooked food before they are thoroughly cleansed and sanitized. Pests Flies, roaches and rats leave bacteria on everything they touch. To illustrate this, we let a cockroach walk on an agar plate. The photo, made after 24 hours, shows the number of bacteria the cockroach left on the plate. Rats, flies, roaches and other insects leave bacteria as they crawl on food, garbage and people.