The vast majority of shopping carts have dangerous bacteria on them.
A new study from University of Arizona professor Charles Gerba shows that nearly three quarters of American shopping carts, where people buying groceries put their food and babies, have fecal matter on them. According to Gerbar, that's more fecal matter than found in a typical public bathroom.
Gerbar and his team swabbed 85 carts in four different states to yield their results: 72 percent of carts tested positive for fecal matter and half were laced with E.coli. As you might imagine, much of the bacteria was found on the carts' handles.