One of the most common indoor molds, known for its rapid spread on water-damaged materials.
Penicillium colonies are typically blue-green or gray-green with a velvety or powdery texture. They often have a white border at the growing edge. Under a microscope, the spore-bearing structures resemble a paintbrush (the Latin word "penicillus" means paintbrush), with chains of spores branching from a central stalk.
Penicillium is found virtually everywhere. Indoors, it is extremely common on water-damaged building materials including wallpaper, carpet, fiberglass insulation, and wet drywall. It also grows on leather, fabrics, and food. It spreads easily through the air due to its lightweight spores.
Penicillium is a major indoor allergen that can cause allergic reactions, asthma, and hay fever. Some species produce mycotoxins including ochratoxin A, which can affect the kidneys and immune system. While the genus is famous for producing the antibiotic penicillin, the indoor species commonly found after water damage are not beneficial and should be treated as health hazards.
Penicillium is one of the most common molds found after water damage. It can begin growing within 24-48 hours of water exposure and spreads extremely quickly. Its lightweight spores become airborne easily, allowing it to colonize areas far from the original water damage site. Thorough drying and remediation are essential.
If you suspect mold growth in your home or business, contact us for a professional assessment.
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