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TESTING ANTIMICROBIAL CLEANER EFFICACY ON GYPSUM WALLBOARD CONTAMINATED WITH STACHYBOTRYS CHARTARUM
MENETREZ, M. Y., K. K. FOARDE, T. D. WEBBER, T. R. DEAN, AND D. BETANCOURT. TESTING ANTIMICROBIAL CLEANER EFFICACY ON GYPSUM WALLBOARD CONTAMINATED WITH STACHYBOTRYS CHARTARUM. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH. Ecomed Verlagsgesellschaft AG, Landsberg, Germany, online(online):online, (2007).
Reducing occupant exposure to indoor mold growth is the goal of this research, through the efficacy testing of antimicrobial cleaners. Often mold contaminated building materials are not properly removed, but instead surface cleaners are applied in an attempt to alleviate the problem. The efficacy of antimicrobial cleaners to remove, eliminate or control mold growth on surfaces can easily be tested on non-porous surfaces. However, the testing of antimicrobial clean efficacy on porous surfaces, such as found in the indoor environment such as gypsum board can be more complicated and prone to incorrect conclusions regarding residual organisms. The mold Stachybotrys chartarum has been found to be associated with idiopathic pulmonary hemorrhage in infants and has been studied for toxin production and its occurrence in water damaged buildings. Growth of S. chartarum on building materials such as drywall has been frequently documented. Research to control S. chartarum growth using 13 separate antimicrobial cleaners on contaminated gypsum wallboard has been performed in laboratory testing. Popular brands of cleaning products were tested by following directions printed on the product packaging. A variety of gypsum wallboard surfaces were used to test these cleaning products at high relative humidity. The results indicate differences in antimicrobial efficacy for the six month period of testing. The U.S. EPA, through its Office of Research and Development, funded and managed the research described herein. It has been subject to an administrative review but does not necessarily reflect the views of the Agency. No official endorsement should be inferred. EPA does not endorse the purchase or sale of any commercial products or services.