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Penicillium: The Good, Bad & Ugly of this Common Indoor Contaminant

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Published on Apr 27, 2012

There are over 300 species of Penicillium. It is perhaps best known as the fungus (P. Chrysogenum) that produces penicillin, a molecule that has saved countless lives as an antibiotic.

Many species of Penicillium can thrive in low humidity environments which allows them to colonize not only stored food products, but also often grow in indoor environments. According to the Centers for Disease Control and Prevention (CDC), "The most common indoor molds are Cladosporium, Penicillium, Aspergillus, and Alternaria." Penicillium spores are often present in the air and dust found in indoor environments.

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