Salmonella linked to onions

(CNN) -- A salmonella outbreak has infected 640 people from 43 states -- including Colorado. At least 85 of the infected people have been hospitalized.

The Food and Drug Administration warned consumers not to eat onions from Thomson International Inc. The Onions were sold at several stores, including: Walmart and Kroger (the parent company of King Soopers) and include red, white, yellow and sweet onions.

The CDC are asking people to check their homes and throw away any of the recalled onions. "If you don't know where your onions are from, don't eat, serve, or sell them or any food prepared with them," the CDC said Friday.

Signs of salmonella infection include diarrhea, fever, and stomach cramps within six hours to six days after exposure. In some cases, the infection can spread from the intestines or other parts of the body and require hospitalization.