agriculture has released a list of stores in nine states that may have received shipments of the beef contaminate with e. coli. >> e. coli bacteria produces a toxin that causes terrible abdominal pain, kidney damage, and in some cases death. none of the 11 people sickened by this latest outbreak died, officials say. investigators trace the bad meat back to wolverine packing company in detroit. ten out of the 11 people who got sick ate at a restaurants supplied by wolverine. but federal officialses are not naming the restaurants. this consumer watchdog thinks that's got to change. >> this is going to make things a little more dicey in terms of consumers who may get sick and don't know what to do or not following this issue closely enough to make the connection between their illness and where they ate. >> reporter: but a top-ranking usda official says it's against regulations to disclose restaurant names. >> people who are exposed have already been exposed. so it doesn't help the public to