Removal or reduction of bacteria to make something safe. Overlaps with disinfection/sterilization, but generally refers to reducing bacterial presence.
食器は洗ってから除菌スプレーを使うと安心だ。
It's reassuring to use a disinfectant spray after washing the dishes.
病院では器具の除菌が徹底されている。
In hospitals, instruments are thoroughly disinfected.
除菌剤は用途に応じて正しく希釈して使用してください。
Please dilute disinfectants correctly according to their intended use.