Cyclospora: The Parasitic Outbreak Spreading Across the U.S. — What You Need to Know
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What Is Cyclospora?
Cyclospora cayetanensis is a microscopic, single-celled parasite that infects the small intestine and causes a gastrointestinal illness called cyclosporiasis. Unlike common stomach bugs, Cyclospora is not spread person-to-person — it requires time outside the body to become infectious, which is why contaminated produce and water are the primary culprits.
Why Is It Spreading Now?
Outbreaks of Cyclospora in the U.S. tend to peak in late spring through summer, often linked to imported fresh produce — particularly herbs, leafy greens, berries, and pre-packaged salads. Health authorities are currently tracking a wave of cases across multiple states, with investigations ongoing into the source of contamination.
Symptoms to Watch For
Symptoms typically begin 1–2 weeks after exposure and can include:
- Watery, sometimes explosive diarrhea
- Stomach cramping and bloating
- Nausea and loss of appetite
- Fatigue and low-grade fever
- Weight loss with prolonged illness
Without treatment, symptoms can last weeks to months and may cycle — improving then worsening. Immunocompromised individuals are at higher risk for severe illness.
How Is It Diagnosed and Treated?
Cyclospora is diagnosed via stool testing — specifically a modified acid-fast stain, which is not part of routine stool panels. If you suspect infection, ask your doctor specifically for Cyclospora testing. The standard medical treatment is a course of trimethoprim-sulfamethoxazole (TMP-SMX), an antibiotic combination.
How to Reduce Your Risk
- Wash all fresh produce thoroughly under running water
- Avoid pre-washed bagged salads during active outbreak periods
- Be cautious with fresh herbs (cilantro, basil, parsley) sourced from high-risk regions
- Drink filtered or boiled water when traveling internationally
- Follow any active FDA or CDC recall notices on implicated produce
Supporting Gut Health During and After Illness
Whether you're recovering from a parasitic illness or simply looking to maintain a resilient gut, foundational gut support matters. Staying hydrated, replenishing electrolytes, and supporting the gut lining are key priorities during recovery. Certain herbs have a long history of traditional use for digestive and immune support — always consult a qualified healthcare provider before using herbal remedies alongside medical treatment.
Herbs with a History of Antiparasitic & Digestive Support
Traditional herbal medicine has long turned to specific botanicals for gut and antimicrobial support. Two worth knowing about:
Cloves (Syzygium aromaticum)
Cloves contain eugenol, a potent phenolic compound studied for its antimicrobial and antiparasitic properties. Traditionally used to support digestive health and combat intestinal pathogens, cloves have been a staple in herbal protocols aimed at gut resilience. They are also carminative — meaning they help ease gas and bloating that often accompany GI distress.
Learn more about our Cloves tincture →
Black Walnut Hulls (Juglans nigra)
Black walnut hulls are rich in juglone, a compound with well-documented antimicrobial and antiparasitic activity in traditional herbalism. Historically used in cleansing protocols, black walnut is often paired with other botanicals to support the body's natural defenses against intestinal invaders. Our Ol' Number 11 formula includes black walnut hulls alongside complementary herbs like green ginger and marshmallow root for broader digestive support.
Important: Herbal supplements are not a substitute for medical treatment. If you believe you have been exposed to Cyclospora or are experiencing symptoms, please seek care from a licensed healthcare provider. These herbs are shared for educational purposes only.
Disclaimer: This article is for informational purposes only and does not constitute medical advice. If you suspect you have a parasitic infection, please consult a licensed healthcare provider.