🔥 Trending Mysterious Diarrhea Outbreak Spreads: What You Need to Know

The "explosive diarrhea" outbreak currently affecting the United States is an ongoing public health concern caused by the Cyclospora cayetanensis parasite, leading to an illness known as cyclosporiasis ³⁴. As of July 2026, thousands of cases have been reported across more than half of U.S. states ⁵⁸¹⁰.

What is Cyclosporiasis?

Cyclosporiasis is an intestinal infection caused by the microscopic parasite Cyclospora cayetanensis ³⁸. This single-celled parasite is known to cause gastrointestinal illness, with its most prominent symptom being watery, often "explosive" diarrhea ⁴⁷.

Symptoms of Cyclosporiasis

The symptoms of cyclosporiasis typically include ⁴⁷:

• Explosive and watery diarrhea: This is the most characteristic symptom.
• Loss of appetite and weight loss: Due to persistent gastrointestinal distress.
• Stomach cramps or pain: Abdominal discomfort is common.
• Bloating and increased gas: Indicating digestive upset.
• Nausea: Though vomiting is less common.
• Fatigue: General tiredness and lack of energy.
• Low-grade fever: Some individuals may experience a slight fever.

Symptoms can appear anywhere from 2 to 14 days after exposure and, if left untreated, can last from a few days to a month or even longer, often with periods of improvement followed by relapse ⁴.

What is Causing the Outbreak?

The Cyclospora cayetanensis parasite is primarily transmitted through contaminated food or water ⁴⁷. The current outbreak is strongly linked to contaminated fresh produce ⁷. The Centers for Disease Control and Prevention (CDC) and public health experts are actively investigating to pinpoint the exact source of contamination ²⁶⁹.

Common Sources of Contamination

Cyclospora outbreaks have historically been associated with various types of fresh produce, including ⁴⁷:

• Berries (e.g., raspberries, blackberries)
• Leafy greens (e.g., lettuce, spinach)
• Herbs (e.g., basil, cilantro)
• Other fresh fruits and vegetables

The parasite is not spread directly from person to person ⁴. Instead, it is typically ingested when people consume food or water that has been contaminated with feces containing the parasite ⁴.

Current Status of the Outbreak

As of July 2026, the outbreak has spread significantly across the U.S., with reports indicating its presence in over 30 states ¹⁵¹⁰. The exact origin of the outbreak remains a challenge for public health experts to track ². Health officials are urging the public to take preventative measures to avoid infection ⁴.

Prevention and Treatment

Prevention Strategies

To protect yourself from cyclosporiasis, health experts recommend the following ⁴:

• Thoroughly wash all fresh produce: Rinse fruits and vegetables under running water before eating, cutting, or cooking. Even if produce is pre-washed, an additional rinse is advisable.
• Practice good hand hygiene: Wash hands thoroughly with soap and water before and after handling food, and after using the restroom.
• Avoid contaminated water: Do not drink untreated water from lakes, streams, or ponds.
• Cook produce when possible: Cooking can kill the parasite, but many affected foods are typically consumed raw.

Treatment

Cyclosporiasis is treatable with specific antibiotics ⁴. If you experience symptoms consistent with cyclosporiasis, especially explosive diarrhea, it is crucial to seek medical attention for proper diagnosis and treatment ⁴.