Lab method
Catalase test
Staph vs strep study branch
KAT-uh-lays
High-yield clue
Catalase positive points toward staphylococci; catalase negative points toward streptococci in basic algorithms.
Overview
A biochemical test concept that detects catalase activity and is commonly taught to separate staphylococci from streptococci.
Classification
- Biochemical test
- Enzyme activity
Lab & identification clues
- Bubble formation vocabulary
- Hydrogen peroxide substrate concept
Associations
- Staphylococcus
- Streptococcus
- Gram-positive cocci flowchart
Commonly confused with
- Coagulase test
- Oxidase test
Frequently asked questions
What is Catalase test?
A biochemical test concept that detects catalase activity and is commonly taught to separate staphylococci from streptococci.
What is the high-yield clue for Catalase test?
Catalase positive points toward staphylococci; catalase negative points toward streptococci in basic algorithms.
What is Catalase test associated with?
Catalase test is associated with Staphylococcus, Streptococcus, and Gram-positive cocci flowchart.
What is Catalase test commonly confused with?
Catalase test is commonly confused with Coagulase test and Oxidase test.
Original concept summary for coursework. Sources checked: OpenStax Microbiology 2e and NCBI Bookshelf Medical Microbiology; reviewed 2026-06. Describes vocabulary and interpretation concepts only; not a lab protocol and not for handling specimens or identifying patient isolates.