Testing for Molds

Can one buy kits in order to test for molds and fungi in a basement instead of hiring expensive professional help? I would prefer to test for the presence of harmful and unknown pathogens in the air. Thanks.

P.S. You may have heard of this: Greenville SC News and Weather - WYFF News 4
I haven’t been scared into testing; I am merely curious.

Yup.

Also, Hank Hill did it.