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  • Equine
  • Equine infectious anemia;
  • Equine piroplasmosis (Babesia caballi or Theileria equi)
  • Parasite;
  • Virus
  • United States Government
  • United States
  • N/A
  • Report
  • Annually

Document Date: Jun/30/2022

United States Equine Piroplasmosis 2021 Annual Report

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Report on the epidemiology of equine piroplasmosis in the United Sates for 2021. 

Summary: There were 35,493 domestic U.S. horses tested for EP from January to December 2021 and a total of 36 new T. equi-infected horses identified in 7 states. Thirty-one of these horses were Quarter Horse racehorses with iatrogenic transmission involved in the epidemiology of the infection and 5 horses  were suspected or confirmed to have been illegally moved from Mexico. Fifteen of the 36 EP-positive horses were found to be dual infected with equine infectious anemia.