myco pn is very very likely. hard to test for, and hard to treat.
since anti fungals helped you might try to test for mold species such as
Aspergillus fumigatus
Aspergillus niger
Cryptococcus
Coccidioides immitis. (if you have ever lived in arizona/california)
list from merck on all the possible fungal infections in humans
https://www.merckmanuals.com/home/infections/fungal-infections/overview-of-fungal-infections
EDIT: since you mention encephalopathy you really should look at both Cryptococcus neoformans and Staph Aureus, both of which can cause that.
https://en.wikipedia.org/wiki/Cryptococcus_neoformans#Serious_complications
Post Edited (Lapis_29) : 11/23/2017 10:09:57 PM (GMT-7)