A parasitic infection known as cyclosporiasis is spreading uncontrollably across Michigan, with the state reporting a record surge of more than 600 new cases in a single day. The Michigan Department of Health and Human Services (MDHHS) confirmed on Tuesday, July 14, that 3,309 infection cases have been identified since June 22, with at least 44 patients requiring hospitalization[1][5]. This figure represents an unprecedented explosion compared to the state's typical annual average of roughly 50 cases[1].
The outbreak is heavily concentrated in southeastern Michigan, particularly in Wayne County where Detroit is located, with adults in their 30s accounting for the largest share of victims[1]. On Monday, state health officials identified **lettuce** and **salad greens** as the most likely source of the contamination, though they cautioned that the investigation remains ongoing[5]. Federal agencies, including the FDA and CDC, stated Tuesday that while they are tracking the lettuce-related clues, they have not yet officially pinpointed a single contaminated source, specific grower, or supplier[1][4].
The food industry is reacting with heightened caution; major fast-food chain Taco Bell announced it is temporarily removing certain ingredients as a preventive measure while epidemiological investigations continue[1]. Health officials warn that the outbreak could persist through late August, which is the peak activity season for the *Cyclospora cayetanensis* parasite[1]. The CDC notes that the parasite typically spreads through food or water contaminated with feces and does not usually spread from person to person[5].
Residents are urged to wash all fresh produce thoroughly under running water and consider cooking vegetables, as heating food to 158°F (70°C) or higher kills the parasite[1][2]. The infection is treatable with antibiotics, specifically trimethoprim-sulfamethoxazole (TMP-SMX), with symptoms typically resolving within one to two days of starting treatment[3][5]. Anyone experiencing sudden or ongoing diarrhea should contact a healthcare
