gamma hemolysis


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gamma hemolysis

[‚gam·ə hi′mäl·ə·səs]
(microbiology)
The absence of activity in the area surrounding a bacterial colony growing on blood agar. Also known as nonhemolysis.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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Hemolysis pattern No hemolysis was observed (Gamma hemolysis) Colony appearance Dry and gray-white, size 0.5 mm Colony count -100 cfu S.
In Table 2, Staphylococcus epidermidis created gamma hemolysis. White raised colonies were observed and recorded, which correlated with the expected culture characteristics for the said test isolate (Delost 2004).
In unwashed fresh blood agar, gamma hemolysis was observed probably because the ATP level was still high, which means most of the cells were still intact.