Aprylla
I want to scream reading this and also seeing something we have dreaded for a few years.
I am the person who wrote the article on Yellow Fungus Disease in Bearded Dragons and have been collecting data and doing studies on this for 4 years, also working with a researcher at University of Wisconsin regarding it.
When I looked at the pictures several pages back, my first thought was this was YFD and after reading more and seeing more, I am fairly certain that is what this is.
YFD is not one thing, it is several types of fungus, one type (the worst and mostly highly contagious one) is a mold fungus called Chryosoporium anamorph of Nannizziopsis vriesii (CANV) for short. It has very distinct traits, including the waxy type build up, failing off, they animal will eat and appear fine as far as that goes for awhile.
It is not only the pictures and your description, that makes me feel it is this fungus........ we have traced the origin of this fungus for 4 years and know that the majority of cases trace back to a breeder that is CLOSELY associated with Reptibid and many of the infected animals have come from them.
I want to put you and your vet in touch with the researcher in Wisconsin that is the foremost knowledgeable expert on this fungus and others in Lizard species in North America. The only way to know for sure if it is, is through a biopsy and it being cultured and read by someone that has vast experience with mold fungi. I know he will work with you and your vet to determine that.
*If it is what I think, this is the first time we have known it to jump to a URO species, it is in many other lizard species, mostly bearded dragons and chameleons (who the breeder I think this one came from has both that are infected)
It is highly contagious to other reptiles and you can pass it from one to another by hands. Please for now, use stick quarantine with all your reptiles, if you do not have Nolvasan, get some it wash your hands with it.... that can also be sprayed right on the URO, left for 20 minutes and rinsed off....we know that is does debrief the dead tissue and also kills the underlying active fungus.
If you want to provide me your Vets name in private PM or email, I will contact him and go over what can be done to try and save this animal, its going to take a lot more than nolvasan or the meds you are using. Please get your email to me and I will respond back with more info, that I can not at this time put on a public board.
I am so sorry, we dreaded that this would show up in other lizard species that are popular as some of the breeders that have it in their colonies also have other species and we know how highly contagious it is. Chances are high also that Ms Shelia has it throughout her entire collection also now