When it comes to ordering at a McDonald's, using a traditional counter over a touchscreen kiosk may be better for your health.

A study by U.K. newspaper Metro found gut and fecal bacteria on touchscreens in all of the chain's restaurants it surveyed. It took samples from the screens in eight branches and found that they contained coliform bacteria, a group of microorganisms found in people's intestines as well as in soil and on plants.