Do do you imply those studies were inconclusive ?? There is more than one study about mannan as the immune suppressor agent. I posted about 4. I have also read those papers about Th17, still don't think that Th17 is the problem because it looks like it is more implicated in fungemia cases. I have read many negative things about Th 17. In any form, it is candida what cause the immune suppression. It is an acquired immune deficiency most of the time caused by the same organism. The proof is people recover after a proper treatment that addresses the immunity and fungal elimination.
A classic test was done with rats. Rats infected with intestinal candidiasis were studied. Researches found candida glycoprotein mannan circulating in their blood and very low cell-mediated immune response in all them.
They managed to change those rats blood eliminating mannan, then an instantaneous immune restoration took place. This is a proof that changing contaminated blood restore cell-mediated immunity. The studies were done with animal models but are valid. The rats weren't treated with antifungals, and after several days, the cell-mediated immune suppression came back.