top of page

Potomac horse fever

A disease that kills in up to 30 per cent of cases


Potomac horse fever is a disease that kills in up to 30 per cent of cases

CBC 2020-09-28 -- Sue McIntosh thought her horse, Finnegan, looked a bit off, so she rushed him to a veterinary clinic a couple of weeks ago. The 13-year-old horse was diagnosed with Potomac horse fever, a disease that kills in up to 30 per cent of cases. An outbreak of the illness has been declared in Alberta <read more>


American Association of Equine Practitioners

Potomac Horse Fever (PHF) is a seasonal, sporadic, but acute and potentially fatal typhlocolitis of horses caused by infection with an obligate intracellular gram-negative bacteria, Neorickettsia risticii (formerly known as Ehrlichia risticii). A novel species of Neorickettsia, N. findlayensis, has recently been isolated from PHF cases and shown experimentally to be capable of causing disease.


Recent Posts

See All

Equine disease alerts

The Canadian Animal Health Surveillance System Disease Alerts Tool provides a nationally accessible inventory of animal health disease alerts from across Canada. Disease alerts can be submitted by gov

Tick Control in Horses

Ticks are becoming an increasingly significant parasite of horses Written by: Thomas Lenz, DVM., M.S., DACT Ticks are becoming an increasingly significant parasite of horses across the United States.

bottom of page