Oklahoma health officials are sounding the alarm this summer as cyclosporiasis cases climb across the state, with dozens of illnesses and several hospitalizations now under active review. Clinics and public health labs are stepping up testing while investigators work with federal partners tracking a larger national uptick. In the meantime, officials are telling residents to be extra careful with fresh produce and to call a clinician if watery diarrhea drags on instead of clearing up.
Cyclosporiasis cases have increased. Knowing the symptoms, how it spreads, and practicing safe food handling can help reduce your risk. Visit https://t.co/Er9Ytsb7SI to stay informed. Any recalled food items associated w/illnesses will be announced at https://t.co/sgFfndTzHp. https://t.co/fnHJ1YjxUZ
— Oklahoma State Dept. of Health (@HealthyOklahoma) July 21, 2026
State Counts And Local Response
As of mid July, the Oklahoma State Department of Health had confirmed 56 cyclosporiasis cases and six hospitalizations, according to figures cited by KGOU. The outlet and other local reporters note that the department is coordinating with county health jurisdictions on testing and detailed patient interviews to help map out where exposures might be happening.
What Cyclospora Is And How It Spreads
Cyclospora cayetanensis is a microscopic parasite that causes an intestinal illness called cyclosporiasis. People typically get sick after eating or drinking food or water contaminated with feces. The parasite has to spend time in the environment before it becomes infectious, which is why outbreaks in the United States are most often tied to fresh produce rather than direct person to person spread. The CDC notes that the usual season for U.S. cases runs from May through August.
Symptoms To Watch For
The hallmark symptom is frequent, watery diarrhea, often joined by stomach cramps, nausea, loss of appetite and bloating. Problems usually begin about a week after exposure. Some people recover without medication, but infections can relapse or drag on for weeks if untreated, and the resulting dehydration can be severe enough to require a hospital stay. Local coverage has urged clinicians to keep Cyclospora on the radar for patients with prolonged gastrointestinal illness and to consider specific testing. KSWO
How To Reduce Your Risk
State officials recommend thorough handwashing before preparing food, rinsing all fruits and vegetables under running water, and scrubbing firm produce with a clean brush to cut down the chance of exposure. They also ask anyone who is sick to stay out of the kitchen when it comes to cooking for others. The Food and Drug Administration has found that fresh produce is the most common vehicle in past U.S. outbreaks and notes that routine chemical sanitizers may not reliably kill Cyclospora on every type of item. The Oklahoma State Department of Health and the FDA both offer consumer guidance and links to state surveillance updates.
For Clinicians: Testing And Treatment
Health officials are asking clinicians to consider Cyclospora in patients with prolonged or relapsing watery diarrhea and to specifically request testing, since many standard stool panels do not reliably pick up the parasite. According to the CDC, the recommended treatment is trimethoprim sulfamethoxazole (TMP SMX), typically one double strength tablet twice daily for 7–10 days for immunocompetent adults. Public health partners are also urging prompt reporting of confirmed cases so investigators can connect the dots on exposures and track potential food sources.
