Why my kid's mouth is purple

I've gotten a curious reaction from a few other moms when I've mentioned that Karis has thrush: their eyes bug out, they gasp and/or groan, and then give me a pitiable look before saying, "Oh, I'm SO sorry! Thrush is SO HARD to get rid of!" Hmm. Well, during an impromptu trip to the UTC last Saturday when I brought Karis in for what I thought might be pink eye but was actually just a plugged tear duct, I asked the doctor to swab Karis' tounge and, sure enough, a little bit of yeast turned up on the culture. Her tounge has had a thick white coating since she was about 3 weeks old, but because it wasn't spreading in her mouth, she wasn't passing it to me, and she wasn't complaining, I figured I'd wait it out. But the white stuff hasn't gone away, so I've decided to tackle the problem with gentian violet. This stuff is EXTREMELY MESSY and will basically dye anything it touches, even after it's dry. Since Karis has had a diaper rash also for a few weeks, I've decided to let her go diaper-free for a few hours a day and expose the rash to sunlight (yeast hates sunlight, apparently) as well as using yogurt to treat the rash. Yummy. Hopefully, all these magic remedies will work and my baby will finally have a normal pink tonge. Until then, she'll look like this: