Though some bacteria are used beneficially in making cheese and yogurt, there are disease-causing bacteria called “pathogens which enter the food supply and can cause food-borne illness. Bacteria may be present on products such as raw meat, poultry, seafood, and eggs when you purchase them. Even produce such as lettuce, tomatoes, sprouts, and melons are not sterile and can catty bacteria.
 What are the causes of food-borne illnesses?
Raw food is the most common source of food-borne bacteria, Raw meat and poultry may get contaminated during slaughter.