CDC Stopped Requiring Cyclospora Reports; Illness Count Already Tops 800
The mandatory-to-optional switch took effect July 1, 2025; the parasite triggers explosive watery diarrhea across 31 states this year.
- CDC's surveillance page lists 843 confirmed and probable cyclosporiasis cases across 31 states, updated July 10.
- Reporting cyclosporiasis to CDC became voluntary on July 1, 2025, ending mandatory state notification.
- Only states choosing to report now feed the national Cyclospora count CDC publishes.
Why it mattersEnding mandatory reporting while cases climb turns a monitoring system into a volunteer tally.
CDC Cyclosporiasis Surveillance page ↗ · Jul 11, 20267/11/26 · ✓ Checked✓ Check