@n4seth & @kayskid - Here is what my ID doc (a gardener himself) had to say about MAC, soil, compost, etc.
"MAC is ubiquitous. So are many other nasty microrganisms. They are everywhere. The idea is to minimize your exposure & not be paralyzed by fear. Be sensible - wet things down to keep from inhaling dust particles, avoid being in the garden on windy, dusty days, or wear a mask & gloves."

So, that is the policy we follow, we also wear N-95 masks when mowing - the one not mowing stays in the house or a far part of the yard. We shower or at least wash our faces, arms & hands when we get in the house. We toss the garden clothes & gloves in the laundry. It has worked well for us so far.

When we are in dusty, windy South Texas (where I think I got MAC from the feral chickens that nest under our trees) we pay someone to do our yard work, stay away while he does, then he washes down the patio & waters the yard before we go out.

Sue