CDC Cyclospora Season Surveillance Begins Amid Early Case Surge

CDC's routine May 1 start of annual domestic Cyclospora surveillance shows an unusually fast early case pace. By comparison, the CDC received just 1,180 domestically acquired cyclosporiasis case reports between May 1 and August 31, 2025 — a fraction of what would accumulate by mid-summer 2026, an early signal of an outsized season.