The U.S. Centers for Disease Control and Prevention (CDC) has documented 843 confirmed cases of cyclosporiasis across 31 states as of July 9, with 1,500 more cases awaiting confirmation. This microscopic parasite, commonly transmitted through fresh produce such as salads, cilantro, basil, and berries, often exhibits a lag of 1–2 weeks between infection and symptoms, complicating source tracking.

Michigan at the Epicenter

Michigan, in the Midwest, has reported 1,562 cases by July 10, making it the focal point of the outbreak. State health officials urge consumers to wash produce thoroughly or cook it to temperatures above 158°F (70°C) to neutralize the parasite.

Reporting Variability and CDC’s Stance

Differences in state reporting practices—some combining confirmed and probable cases, others waiting until investigations conclude—have clouded the true scale of the outbreak. In 2025, under President Trump’s health secretary, the CDC reduced the Foodborne Diseases Active Surveillance Network, rendering state reporting of cyclosporiasis optional.

Projected Trends and Public Health Guidance

The CDC notes a significant rise in cases over the past two weeks compared to the same period in 2025. Public health officials emphasize the importance of thorough washing or cooking of fresh produce to mitigate dehydration risks and prevent prolonged illness.

Prevention and Public Awareness

All states’ health departments recommend washing fresh produce or cooking it to 158°F to kill the parasite. Food safety agencies are calling for stricter inspections across the supply chain to avert future outbreaks.