Phonetic: Pen-uh-sill’-ee-um cry-soh-gee-num

This species, formerly known as Penicillium notatum, was one of the first known producers of penicillin. It is found on damp building materials, including paints, chipboards, and wallpaper found often in moist homes. It is an agent of food spoilage as it is in household dust and indoor air. It can also act as a food source for some types of dust mites. P. chrysogenum has been identified as a significant allergen in the indoor environment and as a rare causative agent of opportunistic human mycosis. Penicillium chrysogenum is often found growing as a dark green colony and can produce the mycotoxins Roquefortine C, Chrysogine, and Meleagrin. (A_w-0.79) Culture - Potato dextrose agar or Malt extract agar, 20° – 25°C, 7 – 10 days.