ERMI is an acronym for Environmental Relative Moldiness Index and it was developed by the U.S. Environmental Protection Agency (EPA), Office of Research and Development (ORD) as a research tool to investigate mold contamination in homes. The EPA designed the test as a ranking system based on dust samples collected from homes, to predict the moldiness of homes. The ERMI is a tool used to predict the potential risk of indoor mold growth and associated health effects to occupants.
The ERMI is a DNA based method of testing, using mold-specific quantitative polymerase chain reaction (MSQPCR), that identifies and quantifies 36 molds and calculates an index number for comparison with a database of reference homes.
The ERMI uses the analysis of settled dust in homes and buildings to determine the concentrations of the DNA of the different species of molds.
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