WEDNESDAY, JULY 15, 2026|No. 7271
Health · Outbreak · US

Cyclosporiasis Outbreak Sickens Over 3,000, Source Remains Unknown

A parasitic outbreak of cyclosporiasis has infected over 3,000 people across 31 states since May, with health officials still searching for the contaminated produce source.

A microscopic view of Cyclospora cayetanensis parasites, the cause of the outbreak.
A microscopic view of Cyclospora cayetanensis parasites, the cause of the outbreak.
2 sources
Pipeline ingest
3 reads
Positive / Neutral / Negative
1 countries
Related coverage

ROCKY HILL, Conn. (WFSB) – People like Dena Pizzoferrato are changing what they put in their grocery carts after hearing about a cyclosporiasis outbreak.

“I’m kind of a little nervous so I’m looking to see what I buy right now,” Pizzoferrato said. “Today I didn’t buy any lettuce. I said I’m OK for now.”

Doctors say the illness is spread through parasites that make their way onto fresh produce. There have been 23 reported cases in Connecticut since May, but the CDC says the number is likely higher. Across the country, more than 840 cases and 86 hospitalizations have been reported in 31 states.

Symptoms include diarrhea and nausea that can last days to weeks. Doctors have not identified a source for the outbreak.

Dr. Ulysses Wu, chief epidemiologist at Hartford HealthCare, said a range of produce could be contaminated.

“Typical things you would think are vegetables or fruits. In the past, it’s been raspberries, basil, cilantro. You may find it in lettuces, bagged salads. So it’s a variety of things that can be contaminated, but they have not found it at this time,” said Wu.

Wu said residents should take precautions with their produce. “Take precautions with your fruit and your produce. We give the same advice when people go overseas that you should always peel something. You should always boil something,” he said.

Doctors also recommend washing produce thoroughly if boiling is not an option, and washing hands regularly.

Copyright 2026 WFSB. All rights reserved.

PAN's pipeline reviewed approximately 2 open sources for this article. No human editor reviewed this article before publication.

Related Reads

Show on timeline →