North Carolina health officials are investigating a cluster of more than 60 cases of cyclosporiasis, an intestinal illness caused by the microscopic parasite Cyclospora cayetanensis. The North Carolina Department of Health and Human Services (NCDHHS) confirmed the uptick in infections, which are primarily associated with the consumption of contaminated fresh produce, according to official state health guidance.
Cyclosporiasis is a gastrointestinal infection that typically manifests after a person ingests food or water contaminated with the parasite. Unlike some common foodborne pathogens, Cyclospora is not transmitted directly from person to person. The current caseload in North Carolina reflects broader seasonal trends, as outbreaks of the parasite are frequently identified during the warmer spring and summer months when demand for imported fresh fruits and vegetables is high, as noted by the Centers for Disease Control and Prevention (CDC).
Clinical Indicators and Patient Presentation
The primary symptom of a Cyclospora infection is watery, often explosive, diarrhea. Patients frequently report a sudden onset of symptoms that can persist for several weeks or even months if left untreated. According to the CDC clinical resource portal, other common signs include loss of appetite, significant weight loss, stomach cramps, bloating, increased gas, nausea, and fatigue. In some instances, infected individuals may experience low-grade fever and vomiting.
Because these symptoms mimic other gastrointestinal illnesses, such as norovirus or salmonella, health professionals emphasize that a definitive diagnosis requires specific laboratory testing. Physicians must request stool analysis specifically for Cyclospora, as standard stool cultures for common bacteria do not typically detect the parasite. The standard treatment for confirmed cases involves a combination of antibiotics, specifically trimethoprim-sulfamethoxazole, commonly known as Bactrim, Septra, or Cotrim, according to Mayo Clinic medical resources.
Transmission and Prevention Measures
The parasite spreads when an individual consumes food or water that has been contaminated with feces containing the parasite. In the United States, most cases are linked to imported fresh produce, particularly leafy greens, fresh herbs like cilantro and basil, and berries. The parasite does not grow on the food itself; rather, it is introduced through contaminated irrigation water or poor sanitation practices during the harvesting and packing process, according to the U.S. Food and Drug Administration (FDA).
Public health officials recommend several steps to mitigate the risk of infection:
- Thorough Washing: While washing produce can help remove some contaminants, Cyclospora can be difficult to eliminate entirely because the parasite can be embedded in the crevices of leafy greens.
- Safe Handling: Maintain strict hygiene in the kitchen, including washing hands before and after preparing fresh foods.
- Cooking: The parasite is sensitive to heat; cooking produce thoroughly is the most effective way to kill the parasite.
- Avoid Contaminated Sources: Stay informed regarding current FDA food safety alerts and recalls related to specific produce items linked to outbreaks.
Public Health Monitoring and Next Steps
The NCDHHS continues to monitor the situation through surveillance and epidemiological tracking. Local health departments work to interview patients about their food consumption history in the days leading up to their illness. This data is critical for identifying potential common sources of the parasite, such as specific grocery store chains, restaurants, or suppliers. The state agency coordinates its findings with federal partners at the CDC and the FDA to determine if the North Carolina cases are part of a larger, multi-state outbreak, according to the North Carolina Division of Public Health.
There is no vaccine available for cyclosporiasis. Individuals who suspect they have been infected—particularly those who have traveled recently or consumed raw produce—are encouraged to consult with their primary care provider and explicitly request testing for the parasite. As of the latest update, the investigation remains ongoing, with officials expected to provide further guidance if a specific food product is identified as the source of the contamination. Residents seeking the most current information or wishing to report suspected foodborne illness should contact their local county health department.
This is a developing situation. We will continue to update this report as official statements are released by the North Carolina Department of Health and Human Services. Share your questions or experiences regarding food safety in the comments section below.