my iguana has turned yellow after vet treatment

Question
First of all i would like to start by telling about my iguanas set up it(since its a 6 month old baby i dont know about its gender) has a 60 gallon water tank with Baskingglo (UVA and heat source) lamb on top of the tank, i use a UVB florecent to help him with the digestion, i bath him with hot water(drinking water) every day to keep him moist he has unused news paper and bamboo root as substrate i feed him with green beans,grapes,bananas etc with the stuff i read about on the greenigsociety.org page a few days ago it dewelopped wounds on its arms,legs and on its belly so i took him to 3 different vets(hard to find a reptile expert here) and than an exotic pet professor on a local university he said my iggy could have 1 of the two diseases one bacterial and one viral i dont know the names of the dieases. so he started him with 2 ointments and 1 oral anti bacaterial along with some vitamins(i donno if you use the same medicenes there but the names of the medicenes he gave is ;Panalog ointment,killoxacin and zovirax) he was doing fine till this morning but when i woke up this morning i saw that it has almost completely turned green and didnt have the strength to hold on to anything i am taking it to the vet again but i am afraid he wont be able to treat him so i would really appreciate some help from the real experts thank you

Answer
Hi Randy

I appreciate the vote of confidence but my area of "expertise" with iguanas is in the husbandry, that is diet, creating a suitable artificial environment and to some extent behaviour in capitivity. I am not a vet and try to avoid second guessing a trained vet who has actually examined the animal. I will offer an opinion in the rare situation when a vet seems to have stepped outside their own area of experience and actually may be causing harm with their treatment.
Your vet seems to be dealing with the situation fairly well and the treatment prescribed covers a broad range of potential infectious organisms . You did not mention if your vet is able to perform blood tests on your iguana which is a very important tool for diagnosing any health problem. The yellow skin colour can be a sign of liver failure which could be confirmed through blood tests.
Your cage and lighting sound fine. He should have a basking temperature in the 95 - 100 F range right under the basking light and a cooler area to move to as well. The proper temperature will help his immune system function to its full capacity.
I did notice that you said you bath him in "hot" water. I hope you just mis-spoke and actually meant warm. Obviously hot water can cause both skin burns and temperature shock and must be avoided. The water should be just slightly warm  or feel neither warm or cool when tested with your hand.
The greenigsociety.org site is a good source for diet info. The stomach contents of wild iguanas indicates that they are primarily folivores, that is leaf eaters. I would encourage you to increase the amount of leafy type salad greens in his diet in addition to the vegetables and try to keep the fruit to around 20% of the total.