I have a 10 yo SWCAH son that had alot of "thrush" as an infant.  It is my understanding that this is a form of a yeast infection/candidiasis.  I do know that many people can get candidiasis, even those not on steroids.  It does make you wonder if people with CAH are at a higher risk of developing Candidiasis.  You might checking at a good health food store for natural ways to treat it.  I know there is information out there...good luck.

Mary