Dictionary » G » Gamma hemolysis

Gamma hemolysis

Definition

noun

Nonhemolytic bacterial colony on blood agar plates.


Supplement

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 gamma hemolysis on blood agar plates.


Variant: γ-hemolysis.

Synonym: nonhemolysis
Compare: alpha hemolysis, beta hemolysis


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Re: NEED HELP WITH MY UNKNOWN GRAM POSITIVE ORGANISM PLEASE??

... looking medium-large sized colonies 3) on blood agar = beta hemolysis 4) on mannitol salt agar = growth (yellow looking colonies) because ... agar = white looking small-medium sized colonies. 3) on blood agar = gamma hemolysis (no hemolysis). 4) on mannitol salt agar = growth (pink looking ...

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by mariah000
Sun Mar 18, 2012 7:50 pm
 
Forum: Microbiology
Topic: NEED HELP WITH MY UNKNOWN GRAM POSITIVE ORGANISM PLEASE??
Replies: 1
Views: 17137

Classification of Haemolysins

I'm familair with classification of (bacterial) hemolysis based on observations of sheep blood agar cultures of bacteria where ... rbc lysis may not occur), beta for complete hydrolysis and clearing and gamma - effectively no observable effect.

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by JorgeLobo
Sat Nov 05, 2011 8:45 pm
 
Forum: Microbiology
Topic: Classification of Haemolysins
Replies: 1
Views: 1866

Horse blood agar

... on that page (scroll down to the differences between alpha, beta and gamma hemolysis): http://www.answers.com/topic/hemolysis

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by canalon
Sat Apr 18, 2009 2:24 am
 
Forum: Microbiology
Topic: Horse blood agar
Replies: 8
Views: 10022

blood agar hemolysis by gram negative bacteria?

... even i am working on hemolysins of leptospira ...u can also conform hemolysis not only by blood agar assay ..u can also conform by taking sheep ... of hemolysis...but blood agar assay gives u details abt alpha r beta r gamma....

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by hisunny4u
Mon Oct 01, 2007 11:56 am
 
Forum: Microbiology
Topic: blood agar hemolysis by gram negative bacteria?
Replies: 3
Views: 9669

blood agar hemolysis by gram negative bacteria?

... I can only find information on blood agar hemolyis for gram positive bacteria. Can I take this to mean that gram negative bacteria are generally gamma hemolytic? If so, are there any notable exceptions to this?

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by spirochete
Sun Sep 09, 2007 7:06 pm
 
Forum: Microbiology
Topic: blood agar hemolysis by gram negative bacteria?
Replies: 3
Views: 9669


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