People use mushrooms for food and medicine. Yeast is
a fungus that is used in baking bread. However, some mushrooms are poisonous, so
never eat a mushroom that you have picked in your backyard, or in a field or forest,
unless identified as safe to eat by a knowledgeable person. The mushrooms that your
parents buy in the store and cook are safe to eat. Some fungal diseases, such as Athletes
Foot, can grow on your body. Some can grow inside your body, causing hard to cure
infections. Two of the medicines made from fungi are penicillin, used to cure infections, and
cyclosporine, important for people who have had organ transplants.