Many people get concerned if the black mold fungus called Stachybotrys appears in lab results even if only a few spores were reported. Some people conclude the results are okay if Stachybotrys was not present even when counts of other mold spores are relatively high. But is Stachybotrys the most dangerous indoor mold? Possibly not. Species of Aspergillus such as Aspergillus fumigatus, Aspergillus flavus and Aspergillus niger (A. niger is a black mold too) are well known health hazards. Personally I would not be concerned if a few spores of Stachybotrys are reported in air samples especially immediately after mold remediation.