The US Centers for Disease Control and Prevention (CDC) is investigating a multistate outbreak of cyclospora infections that has caused explosive diarrhea and other severe gastrointestinal symptoms in at least 210 people across 15 states. The agency has identified contaminated fresh produce as the likely source, though the specific type of produce has not yet been confirmed.
Outbreak Scale and Symptoms
As of July 14, 2026, the outbreak has resulted in 210 laboratory-confirmed cases of cyclosporiasis, a parasitic infection caused by Cyclospora cayetanensis. The CDC reports that 15 people have been hospitalized, but no deaths have been recorded. Symptoms include watery diarrhea, often described as explosive, along with loss of appetite, weight loss, stomach cramps, bloating, nausea, and fatigue. The illness can last from a few days to several weeks and may relapse.
Investigation and Traceback Efforts
The CDC, in collaboration with the US Food and Drug Administration (FDA) and state health officials, is conducting traceback investigations to identify the contaminated food item. Preliminary interviews with affected individuals indicate that many consumed fresh produce, such as salads, herbs, or berries, in the week before becoming ill. The agency has not yet recalled any products but advises consumers to practice safe food handling.
“We are working diligently to trace the source of this outbreak and prevent further illnesses,” said Dr. Sarah Park, a CDC epidemiologist leading the investigation. “In the meantime, people should thoroughly wash all fresh produce and be aware of the symptoms of cyclosporiasis.”
Geographic Distribution
Cases have been reported in: California, Colorado, Florida, Georgia, Illinois, Iowa, Massachusetts, Michigan, Minnesota, New York, Ohio, Pennsylvania, Texas, Virginia, and Washington. The majority of cases are concentrated in the Midwest and Northeast. The CDC notes that the true number of illnesses is likely higher, as some cases may go unreported or undiagnosed.
Prevention and Treatment
Cyclospora is spread by ingesting food or water contaminated with the parasite. To reduce risk, the CDC recommends washing fruits and vegetables thoroughly under running water, especially those eaten raw. The infection is treatable with antibiotics, typically trimethoprim-sulfamethoxazole. Individuals experiencing prolonged diarrhea should seek medical attention and request testing for cyclospora.
Context and Previous Outbreaks
This is not the first cyclospora outbreak in the US. In 2018, a large outbreak linked to salad mixes sickened over 250 people. The parasite is commonly found in tropical and subtropical regions and often contaminates imported produce. The CDC continues to monitor the situation and will provide updates as more information becomes available.
