They can be carried by water, wind, insects, plants, animals and people.
Bacteria survive well on skin and clothes and in human hair.
They also thrive in scabs, scars, the mouth, nose, throat, intestines and room-temperature foods. Cleaning The removal of visible soil and debris. The unintended presence of potentially harmful substances, including microorganisms in food. A disease that is carried or transmitted to humans by food containing harmful substances. Examples are the disease salmonellosis, which is caused by Salmonella bacteria and the disease botulism, which is caused by the toxin produced by the bacteria Clostridium botulinum.