The Centers for Disease Control and Prevention (CDC) has reported that a cyclospora outbreak has now spread to 45 states, with 6,707 confirmed cases since May 1. More than 11,500 additional cases are pending laboratory confirmation or further investigation. The outbreak, which typically peaks in summer, has seen a significant increase in cases compared to previous years.
Key Developments
- The CDC confirmed cases in Delaware, Oregon, South Dakota, and Vermont, bringing the total affected states to 45.
- The U.S. Food and Drug Administration (FDA) is investigating six active cyclospora outbreaks, with only one source identified: iceberg lettuce from Mexico linked to 10,000+ cases in Michigan alone.
- A separate outbreak with 93 cases remains unsolved, with no confirmed source.
Symptoms and Impact
Cyclosporiasis, caused by the parasite Cyclospora, primarily causes explosive diarrhea. Patients range in age from 1 to 98, with a median age of 44. Over 400 people have been hospitalized, but no deaths have been reported.
Investigation and Prevention
The FDA is conducting traceback efforts to identify the source of the unsolved outbreak. Officials have linked some cases to contaminated lettuce from Taylor Farms, served at Taco Bell, while others suspect parsley and cilantro as additional sources. The CDC noted a 6-week reporting lag, meaning case counts are expected to rise.
Government Response
Health officials have emphasized that the U.S. food supply remains safe, despite the outbreaks. The FDA continues to investigate multiple sources, including produce contaminated with feces. The Oregon Health Authority reported cases linked to travel to states involved in the lettuce recall.
Background on Cyclospora
Cyclospora infections are often linked to contaminated produce, and investigations can take time due to the delay in symptom onset and challenges in sequencing the parasite. The FDA has identified nine states with cases tied to lettuce from Mexico.