Lab method
Blood agar hemolysis
Alpha, beta, and gamma hemolysis vocabulary
HEE-mol-ih-sis
High-yield clue
Beta means complete clearing; alpha means partial greenish change; gamma means no hemolysis in study tables.
Overview
A differential-media concept used to describe red-blood-cell clearing patterns around colonies in coursework comparisons.
Classification
- Differential media concept
- Hemolysis vocabulary
Lab & identification clues
- Alpha/beta/gamma terms
- Streptococcal grouping context
- Pattern recognition without procedure steps
Associations
- Streptococcus pyogenes
- Streptococcus pneumoniae
- Streptococcus agalactiae
Commonly confused with
- MacConkey agar concept
- Chocolate agar X/V factors
Your notes
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.