Almost always the food looks and smells good, but it may have enough bacteria or poison to make someone sick. Two examples of this are roast beef that has not been kept cold enough, and chicken soup that has not been kept hot enough. A virus is another kind of germ that causes illness. A virus can be in liquids and foods that a sick person touches. A virus can also be in raw or uncooked foods.
Parasites are tiny worms that live in fish and meat.
They die if they are frozen long enough or cooked long enough. Chemicals , such as rat bait or cleaners, can also cause food poisoning. You must be sure to keep all chemicals away from food. Examples of Food Borne Illness Salmonella Salmonella bacteria are often found in eggs and on poultry and meats, but can come from other sources. People handling raw poultry and meats can easily contaminate their hands, cutting boards and utensils with salmonella.