Depending upon the type of bacteria, the food it has been transferred to and the conditions, the bacteria could start to multiply. If they are spoilage organisms, they will make the food spoil faster. If they are pathogens, they could make someone sick when the food is consumed.
celery
Stomach acid also kills most bacteria that you might swallow with you food.
It takes the moisture out of the food or air therefor killing most bacteria!
Food spoilage happens when bacteria in the food is allowed to grow. The food heats up to room temperature or hotter and the bacteria grow allowing it to spoil.
The bacteria in frozen food die. This is because bacteria need food, water, and a warm temperature in order to survive.
cross-contamination
Mostly on the skin around your nose and mouth. Poor hygiene can transfer the bacteria to food where in can grow and cause food poisoning.
Bacteria in food reaching a temperature of no more than 63c is very dangerous. Bacteria thrive at this temperature. Food is in what can be referred to as a 'high risk or danger zones'. Food should not be consumed and should be destroyed.
Bacteria and germs have an opportunity to settle on the left out food. They will try and invade the food and this causes rotting.
Cellular respiration is the process in which organisms transfer energy from food into ATP.
Contamination.
a cross contamination is the transferring of bacteria from one substance to another. or the spreading of the bacteria between food.