KG349 wrote:
Krisly7 wrote:
So another question. Even isf the mare is treaded and has no outward sign she will be positiv for EPM her whole life and it could flare up at any time?
Yes.  Stress causes flare-ups

Just to be clear, stress cannot cause a flare up if there is no longer an active infection. In horses with latent (untreated) infection, stress can cause flare ups.