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What is black mold?


Mold is a fungus. Black mold is not an official term, since it is impossible to tell with the naked eye what type of mold is present, and many of them appear black or dark gray.

Susan Stewart, in her article in the New York Times, writes, "There are 800 to 1,000 identified molds, according to L. Claire Macdonald, laboratory manager at San Air Technologies Laboratory, a microbial testing firm in Richmond, VA. . . . The most common geniuses of mold in homes are Aspergillus, Penicillium and Cladosporum, she said. Each also manifests in various species, as in Aspergillus parasiticus. Rarer but scarier is Stachybotrys, the mold that is often called 'toxic.'"

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