noun
germs; microorganisms; saprophytic bacteria
Refers to various microorganisms, often with a negative connotation of unwanted or harmful germs. In biological contexts, it can specifically denote saprophytes or saprophytic bacteria that feed on dead organic matter.
手には雑菌がたくさん付いている。
There are many germs on your hands.
食品に雑菌が繁殖しないように冷蔵庫で保存する。
Store food in the refrigerator to prevent germs from multiplying.