CDC Alerts Doctors to Cyclosporiasis Outbreak and Challenges in Diagnosis

The Centers for Disease Control and Prevention (CDC) is issuing clinical alerts to healthcare workers nationwide regarding an ongoing Cyclosporiasis outbreak. As of June 16, 2026, 145 domestically acquired cases have been confirmed across 17 states, with Michigan reporting over 300 cases by July 3. The CDC emphasizes that standard stool tests for diarrheal illness do not detect *Cyclospora cayetanensis*, requiring specific modified acid-fast stain or PCR testing for accurate diagnosis and effective antibiotic treatment.