🔥 Trending Cyclospora Outbreak: Latest Updates and Affected Regions

The United States is currently experiencing a significant outbreak of cyclosporiasis, a diarrheal illness caused by the microscopic parasite Cyclospora cayetanensis ³⁵⁷. As of July 2026, this outbreak has spread to at least 34 states, with thousands of cases reported ³⁴⁸⁹.

Current Status and Scope of the Outbreak

The outbreak, which involves a surge in cases of this intestinal illness, was first reported in early May 2026 ³. Since then, it has rapidly expanded, affecting more than half of U.S. states ⁶.

• Geographic Spread: The illness has been detected in at least 34 states ³⁸. Michigan and Ohio alone have reported over 3,000 cases ⁴.
• National Notifiable Disease: Cyclosporiasis is a nationally notifiable disease and is reportable in 47 states, the District of Columbia, and New York City, allowing for tracking of its spread ¹.
• Ongoing Investigation: Health officials, including the Centers for Disease Control and Prevention (CDC) and state health departments, are actively investigating the outbreak to identify the exact source and prevent further spread ⁴⁹.

Suspected Sources

While the specific source of the current outbreak is still under investigation, several reports suggest a link to certain fresh produce items.

• Lettuce and Salad Greens: Investigations have frequently pointed to contaminated fresh produce, particularly lettuce or salad greens, as a likely source ³⁴.
• Taco Bell Link: Some reports, including from CBS News, suggest a possible link to shredded iceberg lettuce served at Taco Bell, with the outbreak first reported in early May ³¹⁰. However, official sources continue to investigate all potential sources.
• Previous Outbreaks: Past cyclosporiasis outbreaks have often been linked to fresh produce such as raspberries, basil, cilantro, and various leafy greens ⁷.

Symptoms of Cyclosporiasis

The infection is acquired by consuming food or water contaminated with the Cyclospora parasite ⁷. Symptoms typically include:

• Frequent, watery diarrhea or explosive bowel movements: This is the most common and prominent symptom ⁵⁷.
• Nausea ⁵
• Cramps ⁵
• Bloating ⁵
• Low-grade fever ⁵
• Fatigue ⁸
• Loss of appetite ⁷
• Weight loss ⁷
• Dehydration ⁷

Symptoms can appear anywhere from 2 to 11 days after exposure, with an average of 7 days ⁷. If left untreated, the illness can last for weeks or even months, and symptoms may return ⁷.

Prevention and What to Do

Preventing cyclosporiasis primarily involves careful food handling and hygiene, especially when dealing with fresh produce.

• Wash Produce Thoroughly: Rinse all fresh fruits and vegetables under running water, even if they are pre-washed or organic ⁸.
• Avoid Cross-Contamination: Keep raw produce separate from other foods and surfaces to prevent contamination ⁸.
• Cook Produce (where appropriate): Cooking can kill the parasite, but many affected foods are consumed raw ⁷.
• Seek Medical Attention: If you suspect you have cyclosporiasis due to experiencing symptoms like prolonged diarrhea, it's crucial to consult a healthcare provider. Diagnosis usually involves a stool sample test ⁸. Treatment typically involves specific antibiotics ⁸.
• Stay Hydrated: Due to diarrhea, staying well-hydrated is important ⁷.

Public health officials are urging individuals to be vigilant about food safety practices and to seek medical advice if they experience symptoms consistent with cyclosporiasis ⁹.