U.S. health officials are investigating an outbreak of the Salmonella Dublin strain.
Of the 10 identified cases, three are in Colorado — more than any other state.
Eight people have been hospitalized with one reported death in California. The typical hospitalization rate for salmonella is about 20 percent, according to the Center of Disease Control and Prevention.
In half of the people infected, salmonella was found in samples of blood, which indicates that the illnesses were more severe.
Laboratory evidence indicates that the source is likely ground beef. A specific supplier has not been identified yet.
The illnesses started on dates ranging from Aug. 8 to Sept. 22. There may be more people infected that are not recorded yet because of the time it takes between when someone gets sick and when it is reported. That can take anywhere between two and four weeks.
The investigation is ongoing.
Most people with the illness stay sick for four to seven days, and most recover without treatment.
The CDC warns not to eat raw or undercooked ground beef.
Young children, older adults, and people with weak immune systems are more likely to get severely ill.