- Catalase is an enzyme that converts hydrogen peroxide into water and oxygen. The presence of catalase can be easily detected by the slide method. A drop of 3% hydrogen peroxide is put on a slide and the bacteria is emulsified in the drop. The presence of bubbles is evidence of the production of oxygen.
- Staphylococcus, Micrococcus and most aerobic organisms produce catalase, while Streptococcus and most anaerobic bacteria are unable to produce catalse.

