Cyclospora Parasite Outbreak in US: Symptoms, Prevention and Food Safety Tips

Public health officials are investigating a rising number of cyclosporiasis cases across the United States as the Centers for Disease Control and Prevention (CDC) monitors an outbreak spanning 31 states. As of July 9, the CDC has confirmed 843 domestically acquired cases of the parasitic infection, though health authorities emphasize that the actual number of illnesses is likely higher due to reporting lags and asymptomatic infections.

The current cyclospora parasite outbreak, which began on May 1, has led to 86 hospitalisations, though no deaths have been reported. Investigations into potential common food sources remain ongoing, as officials work to identify whether specific produce or products are responsible for the clusters of illness. Hantavirus in US: Rat Disease Spreads to Humans, Kills 4 People; Know Symptoms, Treatment and Prevention.

What Is Cyclospora Parasite?

Cyclosporiasis is an intestinal illness caused by Cyclospora cayetanensis, a microscopic, single-celled parasite. The infection occurs when a person consumes food or water that has been contaminated with feces containing the parasite. Unlike many other foodborne pathogens, Cyclospora is not immediately infectious when shed in stool; it typically requires days or weeks in the environment to mature into an infectious state. Consequently, direct person-to-person transmission is considered unlikely. In the United States, outbreaks are most frequently linked to contaminated fresh produce, such as imported berries, leafy greens, or herbs.

Recognizing the Symptoms of Cyclosporiasis

Symptoms of cyclosporiasis typically develop about one week after consuming contaminated food or water, though they can appear anywhere from two days to two weeks later. The illness primarily affects the small intestine and can be debilitating. Common symptoms include:

• Watery diarrhea: Often described as frequent and explosive, this is the most common symptom.
• Gastrointestinal distress: Including bloating, increased gas, abdominal cramping, nausea, and loss of appetite.
• General fatigue: Many patients report feeling prolonged exhaustion.
• Weight loss: Resulting from the severity or duration of the illness.

Without treatment, symptoms can last from a few days to more than a month and may follow a relapsing pattern, where patients feel better only to experience a return of symptoms. Anyone experiencing these signs should contact a healthcare provider, as testing is often required to distinguish Cyclospora from other common causes of diarrhea.

How To Prevent Cyclosporiasis

While investigations into the source of the current outbreak are ongoing, the CDC and health experts recommend several practices to reduce the risk of infection:

• Practice Good Hygiene: Wash hands thoroughly with soap and water before handling food and after using the restroom. Note that alcohol-based hand sanitizers are not effective at killing the Cyclospora parasite.
• Safe Food Preparation: Thoroughly wash fresh fruits and vegetables under potable running water. Gently rubbing the surface of produce - such as leafy greens or berries - can help remove potential contaminants.
• Consider Cooking: Because the parasite is sensitive to heat, cooking vegetables is a highly effective way to eliminate the risk of infection. The parasite is killed at 158°F.
• Avoid Unsafe Water: Do not drink water directly from streams, lakes, or springs, and be cautious when consuming water in regions where the parasite is endemic.
• Discard Damaged Produce: When preparing fresh fruits or vegetables, cut away and discard any bruised or damaged areas where the parasite may be more difficult to wash away. Endemic, Epidemic, Pandemic: What's the Difference?

Health officials continue to update case counts as investigations proceed. Individuals who suspect they are ill are encouraged to monitor their symptoms and seek medical advice, particularly if they belong to high-risk groups such as children, the elderly, or those with compromised immune systems.

(The above story first appeared on LatestLY on Jul 14, 2026 08:53 AM IST. For more news and updates on politics, world, sports, entertainment and lifestyle, log on to our website latestly.com).