Final answer:
When you don't wash your hands after using the restroom, various viruses and parasites can be transferred to food, such as norovirus, hepatitis A virus, Giardia, and Trichinella. To prevent contamination, it is important to wash your hands thoroughly.
Step-by-step explanation:
When you don't wash your hands after using the restroom, you can transfer various viruses to food. One example is norovirus, which is the leading cause of foodborne disease in the United States. Norovirus can contaminate food when infected people get stool or vomit on their hands and then handle food without washing their hands.
Another example is hepatitis A virus, which causes inflammation of the liver. Parasites such as Giardia and Trichinella can also be transferred if food preparers who are infected with parasites do not thoroughly wash their hands after using the bathroom.
To avoid transferring viruses and parasites to food, it is important to wash your hands after using the restroom and before handling food.