The CDC is issuing clinical alerts to healthcare workers across the country, warning them that a parasitic intestinal illness is circulating and that the standard test ordered for diarrheal illness will not detect it.
The Centers for Disease Control and Prevention has tracked 145 confirmed domestically acquired Cyclosporiasis cases in 17 states as of June 16, 2026. Michigan, not yet included in the federal count, has confirmed more than 300 cases in 7 Southeast Michigan counties as of July 3. The national case total is almost certainly substantially higher than any confirmed count, because most infected patients are never properly tested.
