Filed under: Food and Nutrition, Health in the MediaIf someone told you that a hamburger could be the riskiest menu item at the next restaurant you go to, it would probably sound alarmist. Escherichia coliform (that's E. coli for the rest of us) is staying in the media, so it's not quite as crazy as it appears. Turns out less than a half of one percent of beef is even tested for the bacteria.With hundreds of varieties of E. coli, not all of them are harmful. As this article states, estimates sug