Fig. 7: Streptococcus pyogenes Growing on Blood Agar (Indirect Lighting)

Note small, white opaque colonies, beta hemolysis (complete lysis of the red blood cells around the colonies; see arrows), and sensitivity to the antibiotic bacitracin in the Taxo A® disc. (See close up image.)
Creative Commons License
Microbiology Laboratory Manual by Gary E. Kaiser, PhD, Professor of Microbiology
is licensed under a Creative Commons Attribution 4.0 International License.
Last updated: September, 2017