Our relationship with Penicillium is often beneficial. Varieties of Penicillium have been synthesized to produce life-saving antibiotics, and these molds assist us in producing cheese and meat products. When Penicillium is left to grow unchecked in our homes this relationship can become problematic.

In our homes we find Penicillium most often as that fuzzy green, white, or blue fuzz that grows on the bread in our cupboards or the fruit forgotten in the back of the crisper. It isn’t a good idea to consume Penicillium; if you eat food with Penicillium you may experience severe gastric irritation. Penicillium’s airborne spores can cause allergic reactions such as nasal congestion, watery eyes, and coughing.

Penicillium does not restrict its appetite to the organic matter we call food. It can just as easily thrive in damp wood, clothing fibers, cellulose, or fiberglass. Penicillium mold is often found on furniture in humid basements and when leaky roofs or plumbing leaks are left unfixed it can form on wood, carpets, upholstery, and insulation.

To prevent Penicillium from becoming a problem in your home, be vigilant in throwing away food when it starts to spoil. Carefully and routinely clean out your cupboards and refrigerators. Also, you should be attentive to any areas of your house where water gathers and moisture can form. When spills or leaks occur be attentive and dry them carefully. If you have a persistent water problem, check with a professional to remedy the problem.