beta hemolysis


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beta hemolysis

[′bād·ə hə′mäl·ə·səs]
(microbiology)
A sharply defined, clear, colorless zone of hemolysis surrounding certain streptococci colonies growing on blood agar.
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References in periodicals archive ?
The observation of colonial, morphological and biochemical characters of Staphylococcus aureus revealed medium to large colonies, large, convex, white colonies with a narrow zone of beta hemolysis on blood agar.
Strain VI exhibited beta hemolysis, whereas V2 exhibited alpha hemolysis.
Colonies will exhibit beta hemolysis and need to be differentiated from other beta-hemolytic organisms.
The pathogenic organisms were identified by gross colony morphology and types of hemolysis (yellowish halo around the colony beta hemolysis or turbid halo with greenish cast around colony alpha hemolysis) on culturemedia.