Here's just about the last thing you want to find out now that the summer grilling season is in full swing ...

Men's Health reports that leaving a burger exposed to insects for as little as 30 minutes (which is very possible during a backyard BB-Q) can make it susceptible to E. faecalis, a nasty bacteria that's responsible for the majority of intestinal infections. Even worse, this specific type of bacteria is resistant to antibiotics, so don't expect any immediate reprieve, either.

Evidently, this risk is not limited to our backyard cookouts; 97 percent of flies, collected by Kansas State University researchers from major fast-food restaurants, also tested positive for the bacteria. Hungry yet?