Air Quality Test Kits
The following Air Quality Test kit is a petri dish test for microbials (molds, yeast, bacteria and viruses):
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Air Quality Test Kit (2 per kit)
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This test kit will give you a good idea of general air quality in your home or allow you to conduct a before and after test. Each test kit contains two petri dishes, two bottles of Easygel , color brochure on air quality and detailed instructions. After exposing the test kit to air for 1 hour you place it in a room temperature and low light space for 3 days or more.  A dresser works good.  After 3 days view the test to see how much bacteria,  mold, yeast, fungus etc. has grown.