Dictionary » N » Nonhemolysis




The lack of hemolytic activity in the area surrounding a bacterial colony on blood agar.


The hemolytic reactions of streptococci on blood agar plates can be used for their preliminary identification and classification. For instance, Streptococcus pneumoniae forms alpha hemolysis, Streptococcus pyogenes forms beta hemolysis, and Enterococcus faecalis displays nonhemolysis (or gamma hemolysis) on blood agar plates.

Synonym: gamma hemolysis
Compare: alpha hemolysis, beta hemolysis

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help identifying unknown bacteria

... I thought I had Bacillus cereus , but my confirmation test (Citrate) was negative. Not to mention that streak and incubation on a BA plate gave me nonhemolysis. I did test for acid from glucose, but I had to redo it (and am currently waiting on the results) since after a 2-day period, the indicator ...

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by creidesca
Sat Dec 01, 2007 7:20 pm
Forum: Microbiology
Topic: help identifying unknown bacteria
Replies: 6
Views: 106405

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