Stomach Bug Stumps CDC As Infection Spreads To More Than 275 People In Several States (UPDATE)

07/24/2013 04:34 pm ET | Updated Jul 30, 2013

UPDATE (Jul. 30, 5.25 p.m.): Prepackaged salad mix may be the culprit behind the stomach bug outbreak that has left health officials scratching their heads.

According to NBC News, health officials in Iowa and Nebraska said Tuesday that bagged salad mix may be the source of the cyclospora outbreak.

"The evidence points to a salad mix containing iceberg and romaine lettuce, as well as carrots and red cabbage as the source of the outbreak reported in Iowa and Nebraska," Steven Mandernach, chief of the Food and Consumer Safety Bureau of the Iowa Department of Inspections and Appeals, told the news outlet.

NBC notes that it's unclear at this point as to whether the salad mix is linked to other infections in other states.

As of Monday, the Centers for Disease Control and Prevention report that more than 370 cases of cyclospora infection have been reported in 16 states.

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UPDATE (Jul. 25, 2.45 p.m.): The number of U.S. residents who have come down with a mysterious stomach bug continues to rise this week as the Centers for Disease Control and Prevention announced Thursday that at least 285 people in 11 states have been diagnosed with a cyclospora infection. At least 18 people have reportedly been hospitalized.

The CDC says that it still does not know what's causing this belly bug but some experts suspect that some cases of the illness may be related.

"Because no food item has been implicated to date we're not yet sure the cases in the various states are related," said Dr. Barbara Herwaldt, a medical epidemiologist at the CDC, according to Reuters. "Though it's quite likely that the cases in the Midwest might be."

An earlier report continues below:

Nearly 300 people in several states were struck recently by a mysterious stomach bug, according to the Centers for Disease Control and Prevention.

In an update on its website Wednesday, the CDC wrote that at least 275 residents of multiple states, including Iowa, Nebraska, Texas, Wisconsin, Georgia, Connecticut and New Jersey, have been diagnosed with a cyclospora infection.

The stomach bug, which causes diarrhea and other flu-like symptoms, could be linked to a foodborne illness, according to The Associated Press.

From an earlier AP report:

The Food and Drug Administration is investigating the cyclospora infections, which are most often found in tropical or subtropical countries and have been linked to imported fresh produce in the past.

The illness is usually spread when people ingest food or water contaminated with feces. The agency says it isn't yet clear whether the cases from all the states are linked.

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