Even death can occur. The Center for Disease Control estimates that about 9,000 people die each year as a result of foodborne pathogens. Certain people are at greater risk than others for food poisoning. Their immune systems, the body's way of fighting infections, are often weakened. Very young children.
Bacteria are very, very tiny organisms that can be seen only under a microscope.
Most bacteria don't make people ill. In fact, some are extremely useful. They are responsible for the unique taste and texture of such foods as sauerkraut, some cheeses, and yogurt. But all foods should be handled as if they could cause a problem. In the last few years, viruses have become a problem.