The health department issued a warning as they investigate a more than five times increase in cyclosporiasis cases in McHenry County recently, with no identifiable source so far. The McHenry County Department of Health said Friday it is investigating an increase in reported cases of cyclosporiasis in McHenry County. The health department has identified 61 cases of cyclosporiasis since June 25, more than five times the number of cases reported during the same timeframe in 2025. The McHenry County Department of Health said there is no specific source that has been identified in the current investigation, which is ongoing. The McHenry County Department of Health said they will continue to monitor the situation and provide updates when available.