News from Germany and Spain about large outbreaks of E. coli food poisoning is raising a question that researchers can help answer: Where is this coming from? Despite conjecture that manure is driving outbreaks of the deadly bacteria, in this NewsWatch video, UC Davis food-borne disease expert Rob Atwill says in the U.S., wildlife, not domestic animals, may be the biggest source of contamination.

Read more about UC Davis experts on E. coli and food safety.