Dr. Ritchie Shoemaker developed this test by looking at the ERMI scores of thousands of patients suffering from mold illnesses and determining which species of mold seemed to be most problematic for them.
The HERTSMI-2 is the same basic DNA test as the ERMI, except that it looks for the presence of only five particularly dangerous species of mold – Aspergillus penicilloides, Aspergillus versicolor, Chaetomium globosum, Stachybotrys chartarum, and Wallemia sebi. Testing for the HERTSMI-2 is offered by Mycometrics at a cost that is slightly lower than the ERMI. A HERTSMI-2 score also can be calculated by looking at the scores of a regular Mycometrics ERMI test.
Dr. Shoemaker suggests this test for people who already know that mold is a problem for them, rather than using it to determine whether a residence is unsafe in general.
The use and research for this test is in its early stages.