Need advice for sick snake

[bcr229]

Glass tank, was on reptibark when it started, has been on newspaper ever since. Heat pad under tank regulated with dimmer switch and temp gun. I do a thorough clean whenever he makes a mess. I did the full course of injections starting immediately after seeing the vet. Also rubbed betadine and flamazine on his belly every day for two weeks as instructed by the vet. The culture came in a week later which is when they wanted to give me the parasite medicine.

When you measured the temp over the heat mat was it on top of the Reptibark or was it on the glass? Same with the paper - it can "float" a bit over the glass, creating a thin air gap which will give you a falsely low temp reading.

Does the ambient temp in the room fluctuate, or did it when the problem first showed up? A dimmer doesn't keep the heat mat at a constant temp, it just limits how much electricity goes to the appliance, so they only should be used if your room temp is stable. If your room was 70*F and the heat mat was 90*F initially, if the room temp happened to increase to 80*F for some reason then the heat mat would be 100*F.