Potomac horse fever in Alberta

Deadly horse fever outbreak declared in Alberta


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.


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