This site has alot of info. Please read it all. There are many things that you should do to keep your baby from getting reinfected. Besides cleaning everything with Lysol, bleach and ammonium (bedding, toys, bowls, their clothing and them) you shouldn't take them out until they are totally clear of this. They can pick it up again or give it to others. Plus, you need to make sure you pick up their poop - immediately. Please us plastic throw away gloves. Oh, and they need to be cleaned up after each time they poop or the cysts can "hang around" their bottoms. And yes, Mia had to have 2 treatments for this, too. Not uncommon. BTW she is very sensitive down there now (intestines). We really have to watch her diet as she can get bad diarrhea from almost anything. In fact, we've had to change both the kids to the prescription stuff "Hill's I/D". Good Luck and post again if you need any other help!
Giardia canis in Dogs