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Hemolysis

Definition

noun

The lysis or the breaking open of red blood cell (erythrocyte) causing the release of hemoglobin into the surrounding fluid.


Supplement

Hemolysis has several causes: examples are exposure of erythrocytes to toxins and poisons, bacterial haemolysins, immune reactions like specific complement-fixing antibodies, hypotonicity, alteration of temperature, treatments such as hemodialysis, etc.

In microbiology, the hemolytic reactions of certain microorganisms such as streptococci on blood agar plates can be used to identify or classify them. For instance, Streptococcus pneumoniae forms alpha hemolysis, Streptococcus pyogenes forms beta hemolysis, and Enterococcus faecalis displays gamma hemolysis on blood agar plates.


Word origin: from the Greek hemo-, meaning blood + -lysis, meaning to break open.
Related forms: hemolytic (adjective).

Also spelled as: haemolysis.

Synonym: hematolysis.
See also: hemolysin.


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Re: ID OF UNKNOWN?!?!

Lacking in the list of largely useless and wasted testing is the observation of hemolysis on sheep blood agar.

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by Cepacia
Fri Dec 27, 2013 11:33 am
 
Forum: Microbiology
Topic: ID OF UNKNOWN?!?!
Replies: 5
Views: 1358

Re: Streptococcus sanguis??

Don;t understand why you wasted so much media and time with irrelevant tests. Please determine if this isolate shows alpha hemolysis on blood agar.

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by Cepacia
Sat Dec 21, 2013 1:22 pm
 
Forum: Microbiology
Topic: Streptococcus sanguis??
Replies: 1
Views: 806

Re:

I already gave you the answer in the other thread. It's beta-hemolytic streptococcus (provided that your previous post correctly identified hemolysis). Look at the links bellow: http://loudoun.nvcc.edu/vetonline/vet13 ... cocci2.gif http://img.docstoccdn.com/thumb/orig/9217067.png hey cat im ...

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by microbiologyhelp
Fri Dec 20, 2013 10:07 pm
 
Forum: Microbiology
Topic: ID OF UNKNOWN?!?!
Replies: 5
Views: 1358

Re: Re:

I already gave you the answer in the other thread. It's beta-hemolytic streptococcus (provided that your previous post correctly identified hemolysis). Look at the links bellow: http://loudoun.nvcc.edu/vetonline/vet13 ... cocci2.gif http://img.docstoccdn.com/thumb/orig/9217067.png page cant ...

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by microbiologyhelp
Thu Dec 12, 2013 6:12 pm
 
Forum: Microbiology
Topic: ID OF UNKNOWN?!?!
Replies: 5
Views: 1358

Re:

I already gave you the answer in the other thread. It's beta-hemolytic streptococcus (provided that your previous post correctly identified hemolysis). Look at the links bellow: http://loudoun.nvcc.edu/vetonline/vet13 ... cocci2.gif http://img.docstoccdn.com/thumb/orig/9217067.png page cant ...

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by microbiologyhelp
Sun Dec 08, 2013 10:35 pm
 
Forum: Microbiology
Topic: ID OF UNKNOWN?!?!
Replies: 5
Views: 1358
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