A cyclospora outbreak in Michigan may have peaked following a recall of lettuce linked to the parasitic infection, according to NBC News. Health officials are monitoring case numbers as they assess whether the worst of the outbreak has passed.
Cyclospora is a microscopic parasite that causes intestinal illness. People become infected by consuming food or water contaminated with the organism. Symptoms typically include watery diarrhea, stomach cramps, nausea, and fatigue. The illness can last for weeks if not treated.
The Michigan outbreak was connected to romaine lettuce, which was subsequently recalled. Lettuce has been linked to cyclospora outbreaks in previous years, and the parasite is difficult to eliminate through standard washing. Contamination often occurs in the field or during processing and handling.
After the recall was issued, the number of new cases in Michigan appeared to slow. Public health officials described the trend as a sign the outbreak may have peaked, though they stopped short of declaring it over. Surveillance of new cases was continuing.
Cyclospora outbreaks in the United States are not uncommon during warmer months. The parasite is more prevalent in tropical and subtropical regions, but contaminated produce can introduce it into the food supply anywhere. Outbreaks have previously been traced to fresh herbs, berries, and leafy greens imported from regions where the parasite is endemic.
Treatment for cyclospora infection involves a course of antibiotics. People who suspect they may have been infected after consuming recalled lettuce were advised to contact a healthcare provider. The recall remained in effect as of the report.
