Source
United States Environmental Protection Agency, National Exposure Research Laboratory, Cincinnati, Ohio 45268, USA. vesper.stephen@epa.gov
Abstract
OBJECTIVE:
The objective of this study was to establish a national relative moldiness index for homes in the United States.
METHODS:
As part of the Housing and Urban Development's American Healthy Homes Survey, dust samples were collected by vacuuming 2 m in the bedrooms plus 2 m in the living rooms from a nationally representative 1096 homes in the United States using the Mitest sampler. Five milligrams of sieved (300 mum pore, nylon mesh) dust was analyzed by mold-specific quantitative polymerase chain reaction for the 36 indicator species in 1096 samples.
RESULTS:
On the basis of this standardized national sampling and analysis, an "Environmental Relative Moldiness Index" was created with values ranging from about -10 to 20 or above (lowest to highest).
CONCLUSIONS:
The Environmental Relative Moldiness Index scale may be useful for home mold-burden estimates in epidemiological studies.