How does Salmonella get into foods?

Simply put—it gets into food through the poop of animals, such as cows, birds, and mice. Because the natural home for Salmonella bacteria is in the gut of these animals, their poop becomes a carrier of the germ if it gets into food or water. For example, if water used to irrigate a field has animal poop in it, the water can contaminate the food growing in the field.

Contamination can also occur where food is being made. For instance, a tainted ingredient can get on equipment, floors, storage bins, or someone’s hands and then spread to other food. In fact, a cutting board or knife that has germs on it can contaminate other foods and lead to food poisoning.