Cyclospora Outbreak: How to Stay Safe While Eating Fresh Produce

As summer temperatures climb and grocery store shelves stock up on seasonal favorites, health officials in the United States have issued warnings regarding a spike in cases of Cyclospora. This intestinal parasite, which causes a gastrointestinal illness known as cyclosporiasis, has once again become a point of concern for public health agencies and consumers alike.

Cyclospora cayetanensis is a microscopic parasite that infects the human small intestine. It is typically transmitted when a person consumes food or water that has been contaminated with feces containing the parasite. In the United States, outbreaks are most commonly linked to fresh produce, particularly leafy greens, herbs like cilantro and basil, and fresh berries. Because the parasite is resilient and difficult to remove, it remains a persistent challenge for food safety authorities during the warmer months.

Symptoms of cyclosporiasis can be uncomfortable and disruptive. The most common sign is watery, sometimes explosive, diarrhea. Other symptoms include loss of appetite, weight loss, severe stomach cramps, bloating, nausea, and fatigue. Some individuals may experience low-grade fevers. Unlike some foodborne illnesses that resolve in 24 to 48 hours, symptoms of Cyclospora can be long-lasting. If left untreated, the illness can persist for weeks or even months, with symptoms often coming and going in waves. This makes it particularly dangerous for individuals with weakened immune systems.

Health experts emphasize that the presence of the parasite does not mean consumers should stop eating fresh fruits and vegetables, which are vital for a healthy diet. Instead, the focus should be on proper preparation and food safety habits. Washing produce is a fundamental step, though it is important to note that washing alone may not always be 100% effective against Cyclospora because the parasite can cling to the textured surfaces of leaves or become embedded in the stems of herbs. Despite this, rinsing fresh fruits and vegetables thoroughly under running water remains a primary defense against various bacteria and pathogens.

In addition to washing, cross-contamination prevention is key. Kitchen surfaces, cutting boards, and knives should be cleaned thoroughly after handling raw produce. When possible, cooking produce can kill the parasite, though many popular items linked to outbreaks are typically served raw, such as in salads or as garnishes. For those concerned about specific outbreaks, the Centers for Disease Control and Prevention (CDC) and the Food and Drug Administration (FDA) regularly publish lists of recalled food items. Staying informed about these recalls is the most effective way to avoid contaminated products.

If you believe you have contracted an illness after eating fresh produce, do not ignore persistent symptoms. Medical providers can diagnose the condition through stool sample tests. Treatment typically involves a specific course of antibiotics, often a combination of trimethoprim and sulfamethoxazole. Because the illness can cause significant fluid loss, maintaining hydration is critical during recovery. As cases continue to be monitored across the country, practicing vigilance in the grocery aisle and diligence in the kitchen remains the best strategy for consumers to enjoy their produce safely this season.

Consult a healthcare professional for any medical concerns or symptoms of illness.