Study: Shopping cart handles have E. coli

About 50 percent of shopping cart handles have E. coli on them, as well as other bacteria, say U.S. researchers who tested shopping cart handles in four states, according to msnbc.com.

"That's more than you find in a supermarket's restroom," which tends to be cleaned more often, said lead researcher Charles Gerba, a professor of microbiology at the University of Arizona.

Gerba said parents should wipe shopping cart handles with a disinfecting wipe before they place their children in the shopping cart seat.