ATLANTA—The U.S. Centers for Disease Control and Prevention is investigating a multistate outbreak of the parasitic illness cyclosporiasis after more than 140 domestically acquired infections were reported across 17 states, with investigators examining whether contaminated fresh produce is the source of the illnesses.
According to the CDC, 145 confirmed cases were reported in people who became infected in the United States between May 1 and June 16. Twenty people have been hospitalized, and no deaths have been reported. The agency said the illnesses have been identified in patients ranging from 5 to 86 years old, with most reporting no recent international travel, suggesting exposure occurred within the country.
The infection is caused by the microscopic parasite Cyclospora cayetanensis, which spreads through food or water contaminated with fecal matter. The CDC said local, state and federal health officials, including the U.S. Food and Drug Administration, are investigating several clusters of cases to determine whether they share a common source. Officials have not identified a single contaminated product linking all reported illnesses.
Cyclosporiasis typically causes watery diarrhea, which can be prolonged or recur, along with loss of appetite, abdominal cramping, nausea, fatigue and weight loss. The CDC said symptoms usually begin about one week after consuming contaminated food or water, although some infected people experience no symptoms.
Fresh produce has been implicated in previous U.S. Cyclospora outbreaks, including leafy greens, cilantro, basil and berries. Health authorities said they are conducting epidemiological interviews, traceback investigations and laboratory analyses to identify any products associated with the current illnesses.
Several states have reported increases in cases beyond the CDC's national surveillance period. Michigan health officials said the state had recorded about 170 infections by June 30, while Connecticut confirmed 23 cases as of July 1. Those state investigations are continuing in coordination with federal authorities.
The CDC advises consumers to wash fresh fruits and vegetables thoroughly before eating them, although the agency notes that rinsing alone may not completely remove the parasite from contaminated produce. People experiencing persistent diarrhea, dehydration or other severe symptoms are encouraged to seek medical care, as the illness can be treated with appropriate antibiotics in many cases.
Federal investigators said the source of the outbreak remains under investigation, and no recall or public warning identifying a specific food item had been issued as of Friday.
