The growth of Penicillium in crackes will bring musty odor and bitterness in liquor, which causes serious damage on liquor production. 裂縫中滋生的青黴會對釀酒生產產生危害，給白酒帶來霉苦味。
Fleming proceeded to isolate an extract from the mould, correctly identified it as being from the Penicillium genus, and therefore named the agent penicillin. 弗萊明繼續從黴菌中分離出它的提取物，然後確定它是青黴屬中的一種，從而把這種提取物命名為青霉素。
