Federal health officials identified a new cyclospora outbreak linked to an unspecified product, the U.S. Food and Drug Administration said Thursday.
The agency said the source had “not yet identified.” An FDA spokesperson told CBS News the agency had started a traceback investigation to follow a potentially contaminated food product through the supply chain and identify the source of the outbreak.
The announcement came as North Carolina health officials said they were investigating more than 560 cases since May 1 that may be linked to parsley, cilantro, and lettuce.
The FDA has opened investigations into multiple cyclospora outbreaks nationwide, including one linked to iceberg lettuce from Taylor Farms that has been blamed for thousands of illnesses in nine states, including Michigan, Ohio, Indiana, and Kentucky.
That investigation led Taylor Farms to voluntarily recall all of its iceberg lettuce sourced from central Mexico.
A separate outbreak resulted in at least 10 cases, the FDA said, while another outbreak had ended but remained under investigation.
Cyclospora is a microscopic parasite that typically infects people through contaminated food or water. It causes cyclosporiasis, a gastrointestinal illness that can include severe diarrhea.
Cooking can kill the parasite, but health officials said washing fruits and vegetables alone is not enough.
The Centers for Disease Control and Prevention (CDC) said it had received reports of 4,173 lab-confirmed domestic cases of cyclosporiasis since May 1 and was aware of more than 7,400 additional cases that required further analysis to confirm.
The CDC has confirmed 1,947 illnesses linked to the iceberg lettuce outbreak from June 22 through July 20.
State health departments have reported higher totals in some places. Michigan health officials said Thursday there were 7,664 confirmed cases of cyclosporiasis in that state alone, CBS News Detroit reported.
