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Dictionary » H » Haemolysis

Haemolysis

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.


Word origin: from the Greek hemo-, meaning blood + -lysis, meaning to break open.

Also spelled as: hemolysis.
Related forms: haemolytic (adjective).

Synonym: hematolysis.
See also: hemolysin.


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Re: Horse blood agar

... stuff? Horse blood is more nutritious than sheep blood, which is why it is preferred in the UK. I used hourse blood on my MSc and it didn't affect haemolysis.

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by Sepals
Mon Apr 20, 2009 9:00 am
 
Forum: Microbiology
Topic: Horse blood agar
Replies: 7
Views: 904

Horse blood agar

Beta haemolysis is a clear area around the colonies. Alpha haemolysis is a greenish area around the colonies. There's also so called gamma, which is technically no haemolysis.

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by Sepals
Mon Apr 20, 2009 8:57 am
 
Forum: Microbiology
Topic: Horse blood agar
Replies: 7
Views: 904

Horse blood agar

I cultured an unknown bacteria on horse blood agar and got some colonies grown. But how do you know if there is haemolysis?

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by sdrc0708
Fri Apr 17, 2009 1:35 pm
 
Forum: Microbiology
Topic: Horse blood agar
Replies: 7
Views: 904

Re: Identifying bacteria?

I think sample B might be Bacillus as this produces B haemolysis, although it isn't motile. I think you need further testing to identify them for sure. Btw I assumed they are rods as you said they are motile, sure about that? You haven't mentioned what ...

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by Sepals
Mon Mar 23, 2009 11:01 am
 
Forum: Microbiology
Topic: Identifying bacteria?
Replies: 5
Views: 5774

Urea and membrane permeability of RBC

... polar molecule? I thought they would be impermeable to membranes (unless facilitated by channels). We had a lab experiment on this, recording the haemolysis time of different solutions ... I used two different concentrations of urea - 0.28M and 1.0M. It was found that 0.28M of urea caused faster ...

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by micco13
Mon Aug 18, 2008 5:22 am
 
Forum: Cell Biology
Topic: Urea and membrane permeability of RBC
Replies: 1
Views: 2137
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