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Coagulase

Coagulase

Any bacterial component or product which causes coagulation in plasma containing an anticoagulant such as citrate, heparin or oxalate. Coagulases are produced by certain staphylococci and by yersinia pestis. Staphylococci produce two types of coagulase: staphylocoagulase, a free coagulase that produces true clotting of plasma, and staphylococcal clumping factor, a bound coagulase in the cell wall that induces clumping of cells in the presence of fibrinogen.


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Microbiology HELP QUICK!

HI guys, could someone help me identify my bacteria here please: Catalase test postive coagulase test negative msa agar changed to yellow Purple cocci clusters Blood agar with neomycin in in and i observed nothing on this i wasnt sure what this meant? Thanks!

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by Goldendog232
Wed Nov 07, 2012 7:08 pm
 
Forum: General Discussion
Topic: Microbiology HELP QUICK!
Replies: 0
Views: 668

Re: unknown: s. aureus vs s. epidermidis

Repeat coagulase and use + and - controls.

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by JorgeLobo
Sat Apr 21, 2012 11:18 am
 
Forum: Microbiology
Topic: unknown: s. aureus vs s. epidermidis
Replies: 3
Views: 1977

unknown: s. aureus vs s. epidermidis

... unknown to S. Aureus and S. Epidermidis. I suspect that it is S. Aureus because my MSA plate turn yellow after incubation. However, when I did a coagulase test, it resulted in a gelatin like substance (not solid or liquid). Since it is not completely solid, I can't say that it is positive. This ...

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by thuydeebird
Sat Apr 21, 2012 1:39 am
 
Forum: Microbiology
Topic: unknown: s. aureus vs s. epidermidis
Replies: 3
Views: 1977

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

... salt concentrations and the medium turns from pink to yellow because s.aureus ferments mannitol. 5) catalase positive because it produces o2 6) coagulase positive because it has the protein coagulase that converts fibrinogen to fibrin (the clump looking clot that forms). if your unknown organism ...

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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: 16924

Re: What kind of organism could this be?

... of more confusing for me. But will try to look it up) Do you by any chance remember the test or what page it would be on? I wonder if it could be Coagulase test maybe? I haven't performed that one yet but I know it's for Staph, though is it also for micrococci? or could it be something else...hmmmm....

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by SweetSarah
Mon Feb 27, 2012 3:27 am
 
Forum: Microbiology
Topic: What kind of organism could this be?
Replies: 2
Views: 1541
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