Timid Wild One wrote:
I guess it really just depends on what this specific mare was treated with. If they went the Marquis route, then it's likely she's 100%...if not, though, then there's a chance she might still have some latent infection. Marquis isn't the only treatment, but it is the most effective (and expensive) one.
Yeah, I wouldn't consider anything but Marquis "treatment." Seems like the less expensive options are not effective, and really only manage the infection.

The success of the DMSO/ Marquis treatment is heartening; hopefully it will reduce the length of treatment.