Merced County Confirms 1st Cyclosporiasis Case of 2026 as Fresno Reports Another

Q: With California cases unlinked to the main outbreak, what unknown food source is currently threatening the West Coast's produce supply?

There is no identified unknown food source currently threatening the West Coast’s produce supply based on these California cases. Merced and Fresno counties have each reported a cyclosporiasis case, but officials say the infections were not locally acquired and have not been linked to the main multistate outbreak. California health authorities also say the state is not experiencing an unusual surge, and current cases remain within expected levels. The only clearly identified produce source in the broader national outbreak is shredded iceberg lettuce from Mexico served at Taco Bell locations in several Midwestern states. FDA traceback work has pointed to Taylor Farms de Mexico as a possible supplier in that separate cluster, not to a California-specific or West Coast-wide produce threat. What remains unknown is the source of some other U.S. Cyclospora cases outside that Taco Bell-linked outbreak. Investigators have said multiple unrelated outbreaks may be occurring, but they have not identified a specific food item tied to the unlinked California cases or to a broader West Coast produce risk. In practical terms, the threat is uncertainty rather than a named product. Health officials are advising consumers to wash produce carefully, peel or cook it when possible, refrigerate cut items promptly, and seek testing if symptoms such as prolonged watery diarrhea develop after eating fresh produce.

Q: Beyond washing produce, what is the single most effective way households can destroy the Cyclospora parasite and ensure food safety?

The most effective step beyond washing produce is to **cook it to at least 158°F (70°C)**, which health experts say destroys the *Cyclospora* parasite. That matters because rinsing fruits and vegetables can reduce dirt and some contamination, but it does not reliably eliminate *Cyclospora cayetanensis*. Public health guidance tied to the current surge in cases says heat is the most dependable household control measure, making cooked produce a safer option than raw produce when contamination is a concern. For households, that means thoroughly heating vegetables and other produce that can be cooked, and promptly refrigerating cut or cooked items afterward. Washing hands with soap and water before and after handling produce, trimming damaged areas, and peeling when possible still help reduce risk, but they are secondary to adequate cooking if the goal is to kill the parasite. This is especially relevant as California reports new cases amid a broader national increase in cyclosporiasis and an ongoing investigation into contaminated shredded iceberg lettuce. If someone develops prolonged watery diarrhea, cramping, nausea, fatigue, or weight loss after eating fresh produce, health officials advise seeking medical care and asking about testing for *Cyclospora*, which often requires specific stool testing.

3 articles · Updated · KFSN-TV · Jul 17

Merced County health officials confirmed the county’s first cyclosporiasis case of 2026, a day after Fresno County reported its first case this year.
Officials said the Merced infection was not acquired locally and have not determined whether it is tied to broader U.S. outbreaks.
National investigators have linked some recent outbreaks to shredded iceberg lettuce from Mexico served at Taco Bell locations in the Midwest.
Health experts urged residents to take preventive steps when handling fruits and vegetables as case tracking continues.

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KFSN-TV3h ago

Merced County Health Officials Confirm First Cyclosporiasis Case of Year

WCJB3h ago

Health officials are tracking cases of Cyclospora, a parasite that has been identified in both Alachua and Columbia counties as part of a multi-state outbreak.

YourCentralValley.com3h ago

Merced County confirms non-local cyclosporiasis case, health officials say

8 Sources

A lettuce supplier is blamed for 1,600 illnesses. What's causing the other 5,000 cases in this national parasite surge?

With California cases unlinked to the main outbreak, what unknown food source is currently threatening the West Coast's produce supply?

Beyond washing produce, what is the single most effective way households can destroy the Cyclospora parasite and ensure food safety?

Merced County Confirms 1st Cyclosporiasis Case of 2026 as Fresno Reports Another

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