Food safety is an important part of overall health and wellness. While many people are familiar with bacteria such as Salmonella and E. coli, fewer have heard of Cyclospora cayetanensis, a microscopic parasite that can cause significant gastrointestinal illness. Understanding how it spreads and how to protect yourself can help reduce your risk.
What is Cyclospora?
Cyclospora cayetanensis is a parasite that causes an intestinal infection known as cyclosporiasis. Infection occurs when a person consumes food or water contaminated with the parasite.
Unlike some foodborne illnesses that spread directly from person to person, Cyclospora requires time in the environment before it becomes infectious. As a result, outbreaks are most commonly linked to contaminated fresh produce and untreated water sources.
Common Symptoms
Symptoms typically develop within approximately one week after exposure and may include:
- Frequent watery diarrhea
- Loss of appetite
- Weight loss
- Stomach cramps and bloating
- Nausea
- Fatigue
- Low-grade fever
- Muscle aches.
Symptoms can last for several days or even weeks and may come and go if left untreated.
How does Cyclospora spread?
Cyclospora is most commonly associated with consuming:
- Fresh fruits and vegetables that have been contaminated during growing, harvesting, or processing
- Untreated or contaminated water
- Imported produce from regions where the parasite is more common.
Foods historically associated with Cyclospora outbreaks include:
- Leafy greens
- Cilantro
- Basil
- Raspberries
- Peas
- Salad mixes.
Because the parasite can be difficult to remove completely once produce is contaminated, prevention measures throughout the food supply chain are important.
Prevention tips
Wash produce thoroughly
While washing may not remove all contamination, rinsing fruits and vegetables under running water can help reduce risk.
Practice good hand hygiene
Wash your hands with soap and water:
- Before preparing food
- Before eating
- After using the washroom
- After handling raw foods.
Drink safe water
When travelling, especially in areas where water quality may be uncertain:
- Drink treated or bottled water
- Avoid untreated water from lakes, rivers, or streams.
Stay informed about food recalls
Public health agencies regularly issue alerts and recalls when Cyclospora outbreaks are identified. Staying informed can help you avoid potentially contaminated products.
When should you seek medical attention?
Contact a healthcare provider if you experience:
- Severe or prolonged diarrhea
- Signs of dehydration (dry mouth, dizziness, or reduced urination)
- Significant weight loss
- Symptoms lasting more than a few days.
Cyclospora infections can be diagnosed through laboratory testing, and treatment may be prescribed when appropriate.
Foodborne illnesses can affect anyone. Practicing proper food handling, maintaining good hand hygiene, and staying informed about food safety alerts are simple but effective ways to protect your health.
A few extra moments spent washing produce and following safe food practices can help prevent days, or even weeks, of illness.
Sources
• Cyclosporiasis | Government of Canada
https://www.canada.ca/en/public-health/services/diseases/cyclosporiasis.html
• Canadian Food Inspection Agency
https://inspection.canada.ca
• Cyclospora | CDC
https://www.cdc.gov/cyclospora
• Food Safety | World Health Organization (WHO)
https://www.who.int/health-topics/food-safety
