How to tell if Mold is Spreading

[Carl Moore]

I am looking at a purchase in the Amherst VA area and found Black mold in the kitchen. It looks to be confined to a single wall. I want to know how I can tell if the mold is still spreading. If it is spreading, how can if figure out what other areas might be affected? Since I found this mold, I will need to get it remediated. So, I am looking for a licensed Mold Remediation Contractor in the area too.