A preliminary investigation by the U.S. Food and Drug Administration suggests fresh onions that are served raw on McDonald's Quarter Pounder hamburgers were a likely source of contamination.
The Centers for Disease Control and Prevention traced an ongoing E. coli outbreak to the Central Coastal region of California. If you're sure your lettuce was grown elsewhere, you can eat it.
A new outbreak of E. coli has hit dozens of people in 11 states. No deaths have been reported, but the CDC says consumers should not eat any romaine lettuce until more is learned about the outbreak.
Vegetable farmers in Yuma, Ariz., are asking whether they can co-exist in the same valley with a large cattle feedlot. Those cattle are blamed for contaminating Romaine with toxic E. coli bacteria.
Rinsing foods doesn't always prevent foodborne illness and can sometimes make the risks worse. Here's what the science says about which foods you should run water over and why.
Just to be safe, the CDC is telling consumers to "throw out" all romaine lettuce, including whole heads, because of an E. coli outbreak that has infected at least 61 people and hospitalized 31.