My leaf chams have had a parasitic mite. I used food grade diatomaceous earth to take care of them, and it worked well. However, a word of caution... I am the only person that I know of that has used it directly on a chameleon, and it may not be entirely safe. I dusted each of the chameleons carefully, with the exception of the face. Breathing the dust isn't a great thing, so I removed all of the chameleons from their tanks and sifted the diatomaceous earth into the soil and over the furnishings and plants. I let the dust settle for a couple of hours before placing the chameleons back into them. Because diatomaceous earth doesn't work as well when it is wet, I misted a seperate enclosure, placed the chameleons into that enclosure, and then put them back into the tanks after an hour. It takes about 2 days of this to kill the mites. I am not sure if it is related to the treatment or not, but about two weeks later, one female developed a URI. I treated her with baytril and she recovered. I felt it was a better option than the poisons that are sold to treat mites.
Heika