Although no cases of cyclosporiasis have been reported in the Eastern Upper Peninsula, a large outbreak is affecting people across Michigan and other parts of the country. As of July 24, Michigan has reported 8,176 cases of cyclosporiasis, including 160 hospitalizations. The LMAS District Health Department is monitoring the situation closely and wants residents to know what cyclosporiasis is, how to prevent it, and what to do if they become ill.

Cyclosporiasis is an intestinal illness caused by the microscopic parasite Cyclospora cayetanensis. People become infected by eating fresh produce or drinking water contaminated with the parasite. Unlike many stomach illnesses, Cyclospora is not usually spread directly from one person to another because the parasite must spend time in the environment before it becomes infectious.

Symptoms usually begin about one week after eating contaminated food. The most common symptom is frequent, watery diarrhea. Other symptoms may include stomach cramps, bloating, nausea, loss of appetite, fatigue, weight loss, and occasionally a low-grade fever. Without treatment, symptoms may improve and then return over several weeks or even months.

The current outbreak has been linked to contaminated lettuce. Public health officials continue to investigate the source and identify additional products that may be involved. Most people recover completely with appropriate treatment, but young children, older adults, and people with weakened immune systems may be at greater risk for more severe illness.

While it is not possible to eliminate all risk, following good food safety practices can help reduce your chances of becoming ill. The Michigan Department of Health and Human Services recommends:

• Store fresh produce separately from ready-to-eat foods.
• Keep lettuce and salad greens in sealed bags or containers.
• Wash your hands thoroughly with soap and water after handling raw produce.
• Clean cutting boards, countertops, knives, and utensils after preparing salads or fresh vegetables.
• Wash any fruits or vegetables that may have come into contact with potentially contaminated lettuce before eating them.

It is important to know that simply rinsing lettuce under running water may not completely remove the Cyclospora parasite. However, these food safety practices can help reduce cross-contamination in your kitchen and lower the risk of other foodborne illnesses as well.

If you develop diarrhea that lasts more than a few days, especially if it is severe or accompanied by dehydration, contact your healthcare provider. Be sure to tell them about any recent travel or foods you have eaten, particularly fresh salads or leafy greens. Cyclosporiasis can be diagnosed through specialized laboratory testing and is usually treated successfully with a prescription antibiotic.

At this time, no cases have been identified in our local community, but the LMAS health department continues to work closely with the Michigan Department of Health and Human Services to monitor the outbreak. Staying informed, practicing safe food handling, and seeking medical care when needed are the best ways to protect yourself and your family.

For the latest information about this outbreak, visit the Michigan Department of Health and Human Services or the Centers for Disease Control and Prevention websites, or contact your local health department with any questions at (906) 293-5107.