ONce she started treating him and he got over it he hasn't been lame since. I don't know if she has asked the vet about long term effects. I'd say no. She doesn't like to hear things like that:). Just like she didn't like hearing about iodining the umbilical cord, or getting a pregnant mare off fescue. The year after she had this foal, she had another that she left the mare on fescue, because "there isn't that much out there". She had to bottle feed it, and it died at about 4 months. I think it's immune system wasn't strong. Just my guess. He got a cold, and died.
She is now a believer in iodine and no fescue:). Altho she hasn't breed anything since then either.
Becky
This is just a guess - since it is an infection and he survived (which is not common) he is probably okay. I think sometimes mares are predisposed to have foals with this, since he's not a mare that's not a concern.
However, the one foal we had with severe epiphysitis is now five and is not sound for any hard work.