Health officials at both federal and local levels are currently investigating a seasonal rise in cases of Cyclospora, a foodborne parasitic illness linked to fresh produce. The parasite has been reported in 17 states, including Texas, where case numbers are in the low double digits.
The Centers for Disease Control and Prevention (CDC) has recorded 145 cases of Cyclospora across the United States, resulting in 20 hospitalizations, but fortunately, no fatalities. Investigators have noted that there is no evidence pointing to a large, single outbreak; rather, the increase appears to follow a typical summer trend associated with contaminated fresh produce, often imported from other countries.
Dr. Linda Yancey, an Infectious Disease Specialist at Memorial Hermann in Houston, emphasized that Cyclospora is primarily found in raw foods that are typically not cooked, such as salads and salsas. “This is caused by food, most commonly fresh food, like raspberries, cilantro, lettuce, and fresh basil,” she explained. “Cooking can eliminate the parasite, which is why it’s more commonly found in uncooked items.”
While washing produce under clean, running water is advisable, Dr. Yancey cautioned that it may not completely remove the risk of contamination. She noted that smooth-skinned fruits like blueberries can be washed easily, but complex fruits like raspberries and blackberries may harbor parasites within their intricate structures.
Dr. Yancey also warned against using harsh cleaning methods. “Definitely do not wash your produce with soap; that’s harmful,” she cautioned. “Even vegetable sprays are not effective in removing parasites.”
Symptoms of a Cyclospora infection typically manifest about a week after consuming contaminated food. Dr. Yancey described the initial signs as general malaise with flu-like symptoms, which may progress to abdominal pain, severe bloating, vomiting, and watery diarrhea. While most healthy individuals recover without medical intervention, the illness can pose serious risks to young children and those with compromised immune systems.
If left untreated, the infection can persist for up to six weeks and is known to frequently relapse. Dr. Yancey advised anyone experiencing prolonged gastrointestinal symptoms for more than a week to avoid popular wellness products and seek medical attention. “The parasite cleanses are pseudoscience,” she stated. “They are merely attempts to profit off individuals, and not only do they fail to remove parasites, they can be detrimental to your health.”
To confirm a diagnosis, a specific stool test ordered by a physician is necessary, as standard hospital cultures do not screen for Cyclospora. Once diagnosed, the condition can be effectively treated with common prescription sulfa medications, according to Dr. Yancey.
