Hi @sam595, Mayo Clinic does have physicians that treat chronic systemic candidiasis. They also have several clinical trials regarding fungal infections. I have linked that below so you can check those out.
https://www.mayo.edu/research/clinical-trials/diseases-conditions/fungal-infections
I thought you might be interested in reading this article as well.
- Systemic candidiasis: https://rarediseases.info.nih.gov/diseases/1076/systemic-candidiasis#:~:text=Summary,-Listen&text=Systemic%20candidiasis%20includes%20a%20spectrum,other%20parts%20of%20the%20body.

In addition, here is a study that Mayo published in Mayo Clinic Proceedings that may provide some more information.
https://www.mayoclinicproceedings.org/article/S0025-6196(11)60608-3/abstract
@sam595, where are you located?