Sonar, as for your not wanting to get near trich - it isn't possible, it is one of the most numberous and pervasive molds out of doors (indoors I believe it is penicilium. I have done numbers of tests to see what sort of contams are around using petri dishes open for 1 minute 5 minutes and 20 minutes. I have done swabs from my body and clothing, from dirt outside, from kitchen sponges (very very nasty) and other places. I was going to get to that in my agar thread but it seems as though there is little interest).
Trich can easily be killed by pastureization but the main point always is to keep conditions from getting to the point where the trich takes hold. Moving air, high PH and low humidity are keys. But you know all this, it is just for the others who lurk around here.