I take a lot of that mold work with a figurative grain of salt. I'll confess I'm not familiar with the aspergillus literature, but stachybotrys risks are way overblown. The concerns are driven by courts rather than the medical literature.
The last time I had a deep dive into it there was a single case of stachybotrys poisoning which occurred when a farmhand fell into a silo of moldy hay. He had a complete recovery within 10 days. That ~~was~~ deep dive was 15 years ago so maybe something else has come up?
All of these molds are present in the environment. If you spend any time hiking in the woods or around hay or barns you are exposed to reasonably high levels.
Lawrence "Crash" Davis.