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Detroit — More than a dozen patients at a Detroit hospital were sickened last week with salmonella from an unknown source, officials said.

There is no evidence the illness spread through food to infect 14 patients at Henry Ford Hospital, according to a statement from hospital officials.

Seven patients remain hospitalized but “are doing well,” officials said Wednesday. They are in isolation as a precaution.

No new patients have been identified this week, officials said.

“Michigan Department of Health and Human Services is working in partnership with Henry Ford Hospital to investigate this occurrence,” officials said in the statement. “Salmonella is not typically life-threatening and, in most cases, goes away in less than a week, even if untreated.”

Salmonella often is transmitted by food and can cause cause diarrhea, fever and abdominal cramps about 12 to 72 hours after infection and lasting 4 to 7 days, according to the Center for Disease Control. It also can be spread through contact with animal feces and reptiles.

An estimated 1 million people are infected each year, with around 19,000 hospitalizations and 380 deaths from the illness.

HFournier@detroitnews.com

(313) 223-4616

@HollyPFournier

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