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SESK: Stuff Everyone Should Know · sesk.info/horse-eia-positive

What happens to a horse that tests positive for equine infectious anemia?

Permanent quarantine or euthanasia to protect other horses.

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  1. It is treated and returns to shows
  2. It must be isolated for life or euthanized ✔
  3. It is simply retested yearly and kept in the herd

Why: EIA infection is lifelong, so APHIS says infected horses must be permanently isolated and quarantined or euthanized. They cannot stay with the herd.

Huh, didn't know that: EIA is found nearly worldwide, and the AAEP lists Iceland and Japan as free of it.

The dad joke
A little horse borrowed some money from his big brother and couldn't pay him back for quite a while. So one day his brother told him, pony up!
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References

Answer: It must be isolated for life or euthanized. EIA infection is lifelong, so APHIS says infected horses must be permanently isolated and quarantined or euthanized. They cannot stay with the herd.

  1. Equine Infectious Anemia (USDA APHIS) www.aphis.usda.gov/livestock-poultry-disease/equine/infectious-anemia
    they must be permanently isolated and quarantined or euthanized.
    Checked 2026-10-10.
  2. Equine Infectious Anemia (EIA) Disease Guidelines (AAEP) aaep.org/resource/equine-infectious-anemia
    Countries free of EIA include Iceland and Japan.
    Checked 2026-10-10.

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