By Maytal Imani, Staff Writer
In spite of its size, a parasite that can only be detected under a microscope has created a major food-safety concern for thousands of people across America. Cyclosporiasis, an intestinal illness, is caused by Cyclospora cayetanensis, a microscopic parasite transmitted through contaminated food and water. As cases continue to rise, the illness has gained an alarming nickname across social media platforms: the “explosive diarrhea parasite.” Behind the nickname, however, is a severe and exhausting infection, causing patients relentless gastrointestinal distress.
What began at the start of this May has now developed into a growing national outbreak. According to the Centers of Disease Control and Prevention (CDC), over 1,600 cases were concentrated in Indiana, Kentucky, Michigan, Ohio, and West Virginia, with investigators linking the cause to shredded iceberg lettuce from Taylor Farms de Mexico.
Symptoms usually begin about one week after ingesting contaminated food and water, with the most common symptom being frequent, watery diarrhea. Other symptoms include increased gas, nausea, bloating, unintended weight loss, loss of appetite, stomach cramping, fatigue, and bloating.
With frequent updates in the number of cases reported, additional states have also seen an increase in affected individuals. Since May 1, 2026, more than 400 cases have been reported in New York City alone, although the source of these cases has not yet been confirmed by the New York City Department of Health. Individuals are now fearful of consuming fresh produce, opting out of salads or anything that might contain lettuce. Cooking food to at least 158 degrees Fahrenheit (70 degrees Celsius) kills Cyclospora; however, this tactic proves useless for foods normally eaten raw, such as fresh produce or salads.
In Michigan alone, health officials have now reported 11,234 cases as of August 3rd, making it the state most heavily affected by the outbreak. The Michigan Department of Health and Services (MDHHS) also confirmed two deaths linked to cyclosporiasis. According to medical records, both patients had significant underlying health conditions that may have made them more vulnerable to complications from the infection, including severe dehydration. Although deaths from cyclosporiasis are extremely uncommon in America, these fatalities emphasize the risks the illness can pose to vulnerable patients and the importance of contacting a healthcare provider as soon as symptoms develop.
Diagnosing the parasite can be quite difficult as well. Before testing, healthcare providers review a patient’s symptoms, medical history, recent diet, and travel history. Cyclosporiosis is identified through stool testing, which may require several samples collected on different days to ensure accurate detection. Because routine stool tests do not always screen for Cyclospora, physicians must specifically request the test.
In addition to washing fruits, vegetables, and herbs thoroughly, people can take preventative measures by avoiding pre-packaged salad mixes and drinking only bottled or boiled water when the safety of the water supply is uncertain. However, washing produce does not guarantee that the parasite will be completely removed.
Fortunately, cyclosporiasis can be treated. The primary treatment is an antibiotic combination called trimethoprim-sulfamethoxazole (TMP-SMX), commonly sold under trade names such as Bactrim, Septra, or Cotrim. People with allergies, underlying health conditions, or weakened immune systems should reach out to their health care providers for the best course of action. Receiving treatment early is especially important because symptoms may return or even persist for months if the infection is left untreated.
Although the outbreak has inspired jokes and viral posts online, physicians warn that the illness should not be taken lightly. Ekta Gupta, MD, Chief of Gastroenterology at the University of Maryland Medical Center Midtown Campus, stated, “This parasite is not a weight loss hack. This is a health crisis that we need to take seriously.”
An ordinary bowl of salad may seem harmless, but this outbreak proves that the greatest dangers can be hidden in the most familiar foods. With more than 6,000 confirmed cases now spanning 45 states, the spread of Cyclospora has disrupted the nation’s food supply, raised concerns about everyday produce, and sent hundreds of people to the hospital. Though the parasite may be invisible to the human eye, it serves as a powerful reminder to pay attention to what is on your plate and seek medical care when symptoms persist.
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