Fig. 1B: Beta Hemolysis on Blood Agar (Indirect Lighting)

Dtreptococcus pyogenes showing beta hemolysis on blood agar

Note clear, colorless zone surrounding colonies where complete lysis of the red blood cells by the hemolysins has occurred. You can actually read text through an area of beta hemolysis.

By HansN. (Own work) [CC BY-SA 3.0 (https://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons

Gary E. Kaiser, Ph.D.
Professor of Microbiology
The Community College of Baltimore County, Catonsville Campus
This work is licensed under a Creative Commons Attribution 3.0 Unported License
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Last updated: March, 2018
Please send comments and inquiries to Dr. Gary Kaiser