The Parasite Behind This Summer’s “Explosive Diarrhea” Outbreak — And What NOT to Do If You Get It
You may have already seen the headlines. A parasitic infection called cyclospora is spreading fast across the U.S. right now >over 4,000 cases nationally as of this week, with more than 30 states reporting cases. Michigan is seeing its largest outbreak in state history, and health departments in Ohio, New York, Illinois, and North Carolina are tracking clusters too.
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The parasite is typically linked to fresh produce exposed to contaminated water — historically things like berries, basil, and cilantro, and the CDC describes the illness as causing watery diarrhea “with frequent and sometimes explosive bowel movements.”
Given how many of you are asking me about this, I want to walk through the practical side: what NOT to do if you find yourself dealing with sudden, severe GI symptoms right now — and what actually helps your body get through it.
→ What NOT to do
1. Don’t reach for loperamide (Imodium) right away.
This is the one people get wrong most often, and it makes sense — explosive diarrhea is miserable and your instinct is to shut it down immediately. But anti-motility medications work by slowing your gut down. When there’s an active infectious process happening, slowing transit can mean the organism (or its toxins) stays in contact with your gut lining longer, which may prolong symptoms rather than resolve them.
This isn’t a blanket rule for every type of diarrhea, and it’s absolutely a conversation to have with your pharmacist or physician first — but with a suspected infectious cause circulating like this one, don’t self-treat with an anti-diarrheal as your first move.
2. Don’t lean on raw produce right now — yes, even the “healthy” stuff.
I know salads and berries are usually my answer to almost everything. Not this week. Cyclospora spreads through fecal contamination of irrigation water, and fresh fruits and vegetables eaten raw have historically been the source of outbreaks. Until a source is identified, I’d rather you temporarily lean on cooked produce than risk raw greens, salad mixes, and fresh berries.
3. Don’t assume it’ll “just pass” if it’s dragging on.
If diarrhea hasn’t resolved on its own within a few days, that’s your sign to see a healthcare provider and specifically ask about cyclospora testing, it’s typically treated with antibiotics once confirmed, some integrative practitioners choose herbal antimicrobials as an alternative when appropriate , so this isn’t something you want to try to just “gut out” (no pun intended) for weeks.
→ What TO do
1. Cook your produce whenever possible. And wash with mixture of water and distilled vinegar. Or buy an organic wash for vegetables/fruits.
Heat neutralizes the parasite. Swap raw salads for roasted, sautéed, or steamed vegetables for the time being, and hold off on fresh berries until the outbreak source is identified and contained.
2. Support your gut with probiotics.
A quality, multi-strain probiotic can help support your gut lining and microbial balance while your system deals with an infectious insult. This isn’t a treatment for the parasite itself — it’s supportive care alongside whatever your provider recommends.
3. Consider a binder.
Binders (like activated charcoal or specific clay-based binders) can help support the body’s natural process of clearing out unwanted material from the gut. Always take these away from food, medications, and supplements — timing matters, so this is worth discussing with your practitioner or pharmacist so it doesn’t interfere with anything else you’re taking.
4. Apple cider vinegar shots.
Diluted ACV (always diluted — straight ACV can damage your esophagus and tooth enamel) is a simple, low-risk addition many people use to support digestion and gut pH. Think of it as a small supportive habit, not a cure.
5. Oil of oregano — cooked into food, not straight.
Oregano oil has long been discussed for its properties that may support the gut environment during times of microbial imbalance. I prefer using it cooked into food rather than as a concentrated standalone dose, especially for anyone sensitive to it.
6. Hydration and electrolytes, always.
This is the one people forget in the middle of GI chaos. Severe or prolonged diarrhea can deplete fluids and electrolytes fast. Water alone isn’t enough — you need sodium, potassium, and magnesium (glycinate is my preferred form) to actually rehydrate at the cellular level.
The bottom line: if you’re dealing with sudden, severe GI symptoms this summer, don’t reach for the anti-diarrheal reflexively, ease off raw produce for now, and see a provider if it doesn’t resolve in a few days. Supportive tools like probiotics, binders, diluted ACV, and cooked oregano can help your body along — but they support your care team’s plan, they don’t replace it.
Have you or anyone you know been dealing with this? Drop a comment — I want to know what’s actually happening on the ground right now.
Dr. Inna Melamed, PharmD, is a functional/integrative medicine practitioner, a pharmacist with close to 3 decades of clinical experience and a two-time bestselling author. She helps people with chronic gut conditions — including Crohn’s, colitis, and IBS — find root-cause solutions at DigestiveReset.com.
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