Cyclosporiasis Outbreak: How to Protect Yourself at the Table
A cyclosporiasis outbreak has sickened roughly 6,700 people since May. Experts offer practical steps to reduce your risk.
A parasitic illness called cyclosporiasis has quietly spread across the United States since May, infecting approximately 6,700 people with its hallmark symptom: persistent, watery diarrhea. The scale of the outbreak has prompted food-safety experts to revisit everyday kitchen habits that many Americans take for granted, particularly around fresh produce.
The parasite behind the illness, Cyclospora cayetanensis, is typically transmitted through contaminated food or water. Unlike bacterial pathogens that can sometimes be neutralized by a quick rinse, this microscopic organism is resilient enough to survive on raw leafy greens — which is why health guidance has zeroed in on lettuce as a food to avoid during the outbreak's active phase.
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For greens that are not typically eaten raw, cooking remains the most reliable line of defense. Heat effectively destroys the parasite, making sautéed spinach or braised chard far safer options than their fresh counterparts during an active outbreak. The broader lesson is one food-safety professionals have long emphasized: cooking is among the most underutilized tools consumers have against foodborne pathogens.
The outbreak's duration — stretching across multiple months — underscores both the difficulty of tracing a single contamination source in a complex agricultural supply chain and the importance of consumer-level precautions when official investigations are still ongoing. Until a definitive source is identified and removed from circulation, individual vigilance at the grocery store and in the kitchen remains the most actionable form of protection available to the public.
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