Cross-contamination — Food Safety Glossary

The transfer of harmful bacteria, allergens or other hazards from one food, surface or person to another.

Frequently asked questions

What are the main types of cross-contamination?

Food-to-food (such as raw juices dripping onto cooked food), equipment-to-food (shared unwashed utensils or surfaces), and people-to-food (unwashed hands, hair or dirty clothing).

How do colour-coded chopping boards help?

Assigning different coloured boards to different food types, such as raw meat and salads, makes it easy for staff to avoid using the same board for raw and ready-to-eat foods, reducing the chance of transferring bacteria.

Is cross-contamination only about bacteria?

No. Allergen cross-contact is also a form of cross-contamination, where traces of a food allergen transfer to a dish meant to be free of it. This can cause a serious reaction in a sensitive customer.

How should raw and cooked food be stored to prevent cross-contamination?

Store raw meat, poultry and seafood in sealed containers on the lowest fridge shelves, below ready-to-eat foods, so juices cannot drip onto food that will not be cooked again.

Does washing hands really make a difference?

Yes. Hands are one of the most common ways bacteria and allergens move between foods. Washing hands thoroughly at the right times is one of the simplest and most effective controls.

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