Bacteria need warmth and moisture to grow – that’s why we need to keep certain foods nice and cold in the fridge. Bacteria reproduce by dividing themselves, so one bacterium becomes two, two become four, and so on.
In the right conditions, one bacterium could become several million in eight hours and thousands of million in twelve hours.
This means that if a food is contaminated with a small number of bacteria and you leave it out of the fridge overnight, it could be seriously contaminated by the next day. Then just one mouthful could make you ill. If you put food in the fridge it will stop bacteria from multiplying.
Since you can't see, taste or smell bacteria, the only way you can be sure that food is safe is to follow good food hygiene at all times.
In the right conditions, one bacterium could become several million in eight hours and thousands of million in twelve hours.
This means that if a food is contaminated with a small number of bacteria and you leave it out of the fridge overnight, it could be seriously contaminated by the next day. Then just one mouthful could make you ill. If you put food in the fridge it will stop bacteria from multiplying.
Since you can't see, taste or smell bacteria, the only way you can be sure that food is safe is to follow good food hygiene at all times.
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