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Streptococci

streptococci --> Streptococcus

(Science: bacteria, organism) A genus of bacteria that are gram-positive cocci, often occurring in chains of varying length. Some pathogenic species produce exotoxins. In man, streptococcal species are responsible for numerous infections such as scarlet fever, tonsillitis, erysipelas (skin infection), endocarditis, rheumatic fever, glomerulonephritis, impetigo, pneumonia, meningitis, pharyngitis, lymphadenitis and wound infections. Streptococcus pneumoniae is the main culprit in lobar and bronchopneumonia.

streptococci have anti-phagocytic components (hyaluronic acid rich capsule and m protein) and release various toxins streptolysins O and s, erythrogenic toxin) and enzymes streptokinase, streptodornase, hyaluronidase and proteinase. Haemolytic streptococci (viridans streptococci) produce limited haemolysis on blood agar, include streptococcus mutans, streptococcus salivarius and streptococcus pneumoniae. Beta haemolytic streptococci, of which streptococcus pyogenes is the only species, though there are many serotypes, produce a broad zone of almost complete haemolysis on blood agar as a result of streptolysin O and S release. Alpha streptococci are nonhaemolytic (e.g. Streptococcus faecalis).


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Re: Re:

... pathogens at best (or worst?) and normally cause disease only in immunologically compromised persons. If you had Staphylococci (or similar-looking Streptococci ) in your blood, I think you would almost certainly be hospitalized by now as those cases can be life-threatening. The symptoms include ...

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by snowathlete
Thu Dec 12, 2013 6:57 pm
 
Forum: Microbiology
Topic: What do you think these are, in my blood?
Replies: 16
Views: 8632

Re: Re:

... faecium) 5=Streptococcus equi 17=Enterococcus durans (Strep. faecium var durans) 6=Streptococcus zooepidemicus 18=Streptococcus bovis 7=group E streptococci from swine 19=Streptococcus equinus 8=Streptococcus anginosus 20=Streptococcus uberis 9=Streptococcus pneumoniae 21=Streptococcus avium ...

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by microbiologyhelp
Thu Dec 12, 2013 6:12 pm
 
Forum: Microbiology
Topic: ID OF UNKNOWN?!?!
Replies: 5
Views: 3300

Re:

... pathogens at best (or worst?) and normally cause disease only in immunologically compromised persons. If you had Staphylococci (or similar-looking Streptococci ) in your blood, I think you would almost certainly be hospitalized by now as those cases can be life-threatening. The symptoms include ...

See entire post
by biohazard
Thu Dec 12, 2013 4:49 pm
 
Forum: Microbiology
Topic: What do you think these are, in my blood?
Replies: 16
Views: 8632

Re:

... designed to ID gram negative bacteria. In your earlier post you said that you got beta hemolysis, so you can say that it's "beta hemolytic streptococci" or you can do additional tests to determine which one. See flow charts: http://loudoun.nvcc.edu/vetonline/vet132/micro/flowchartGposcocci2.gif ...

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by microbiologyhelp
Mon Dec 02, 2013 9:12 pm
 
Forum: Microbiology
Topic: URGENT HELP IDENTIFYING UNKNOWN BACTERIA!!!
Replies: 6
Views: 5287

URGENT HELP IDENTIFYING UNKNOWN BACTERIA!!!

... designed to ID gram negative bacteria. In your earlier post you said that you got beta hemolysis, so you can say that it's "beta hemolytic streptococci" or you can do additional tests to determine which one. See flow charts: http://loudoun.nvcc.edu/vetonline/vet132/micro/flowchartGposcocci2.gif ...

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by Cat
Sun Dec 01, 2013 8:02 pm
 
Forum: Microbiology
Topic: URGENT HELP IDENTIFYING UNKNOWN BACTERIA!!!
Replies: 6
Views: 5287
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