In this week's CDC MMWR, an article about a 2023 outbreak of cyclosporiasis. "In June 2023, a total of 47 cases of cyclosporiasis were associated with consumption of food from a Mexican-style restaurant in Alabama. Analysis of case-control data identified cilantro as the likely food source. Collaboration among multiple states and their respective agencies enabled successful traceback of cilantro to a source in Mexico."
Interesting items from the article:
- "C. cayetanensis, the parasite that causes cyclosporiasis, is resistant to routine chemical disinfection or sanitizing methods, limiting the ability for restaurant operators and food distributors to eliminate risk for contamination through effective sanitation practices (3). Because the restaurant’s environmental assessment report included no substantial findings, contamination likely occurred before arrival at the restaurant."
- "Through this investigation, a domestic distributor without an identified manufacturing license who sourced produce from an international supplier was discovered, presenting an opportunity for regulatory intervention and education to prevent the future sale and distribution of potentially contaminated product through improper supply channels."
Cyclospora is a single cell parasite that causes an intestinal infection called cyclosporiasis. Cyclospora is spread by people ingesting food or water that was contaminated with feces from an infected individual. Humans are the only known host (unlike other parasites that have other animals hosts). It is not unlikely, however, to be passed from person-to-person, because it needs time (days to weeks) after being passed in a bowel movement (pooped) to become infectious for another person.
It is seen mainly in tropical or subtropical regions of the world but makes its way into the United States, via contaminated food, primarily imported fresh produce, or from people who travel to these areas. The symptoms take about a week to show up, and it is in the form of watery diarrhea, with frequent, sometimes explosive, bowel movements. (Other symptoms include loss of appetite, weight loss, stomach cramps/pain, bloating, increased gas, nausea, and fatigue. Vomiting, body aches, headache, fever, and other flu-like symptoms may be noted.) Some people who are infected can be asymptomatic (no symptoms).
https://www.cdc.gov/mmwr/volumes/74/wr/mm7413a1.htm
Outbreak of Cyclosporiasis Among Patrons of a Mexican-Style Restaurant — Limestone County, Alabama, May–June 2023Weekly / April 17, 2025 / 74(13);217–221
Justine Goetzman, MPH1; Adyneshia Carter, MPH1; Ana Oliveira, DrPH1; L. Amanda Ingram, MPH1