Researchers at Penn State have found that more than 350 kinds of bacteria can be found on the bodies of houseflies, including nasty stuff like E. coli and salmonella. Houseflies are linked to at least 65 diseases in humans, including typhoid fever, leprosy and tuberculosis. The worst news? Flies regurgitate and excrete wherever they come to rest. That’s right. They’re not just walking around with their little fly feet on your food. They’re pretty much throwing up on it. (Vice)