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Staphylococcus

Staphylococcus

(Science: bacteria) genus of nonmotile gram-positive bacteria that are found in clusters and that produce important exotoxins. Staphylococcus aureus (Staphylococcus pyogenes) is pyogenic, an opportunistic pathogen and responsible for a range of infections including severe sepsis, pneumonia, endocarditis and soft tissue infections. It has protein A on the surface of the cell wall. Coagulase production correlates with virulence: hyaluronidase, lipase and staphylokinase are released in addition to the toxins.


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Re: Re:

Actually, Staphylococci are not the same as Micrococci . Some species of Staphylococcus are important human pathogens, whereas Micrococci are opportunistic pathogens at best (or worst?) and normally cause disease only in immunologically compromised persons. ...

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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: 9889

Re:

He thinks these are a micrococci - perhaps Staphylococcus. Actually, Staphylococci are not the same as Micrococci . Some species of Staphylococcus are important human pathogens, whereas Micrococci are opportunistic pathogens at best (or worst?) ...

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by biohazard
Thu Dec 12, 2013 4:49 pm
 
Forum: Microbiology
Topic: What do you think these are, in my blood?
Replies: 16
Views: 9889

What do you think these are, in my blood?

... species of Bartonella and some can look quite different to others, but I value my vet friend's opinion. He thinks these are a micrococci - perhaps Staphylococcus. What do you think of that? EDIT: Oh, btw, he said the staining is with the Wright modified stain.

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by snowathlete
Thu Dec 12, 2013 1:14 pm
 
Forum: Microbiology
Topic: What do you think these are, in my blood?
Replies: 16
Views: 9889

Re: Re:

... dots in the smear still don't quite seem like bacteria in my opinion, but I cannot say for certain from the images you posted. After all, a common Staphylococcus looks pretty much like a dark violet dot under most staining conditions. Though now as you said, there is an erythrocyte in the last ...

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by biohazard
Tue Dec 10, 2013 2:02 pm
 
Forum: Microbiology
Topic: What do you think these are, in my blood?
Replies: 16
Views: 9889

Re: staphylococcus aureus and biofilm formation

A number of factors contribute to antibiotic resistance, genetic mutations can lead to the modification of the target for the antibiotic usually a protein (but not always) therefore making the antibiotic less effective. Other resistance factors include efflux systems that can pump the antibiotic bac...

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by stopherlogic
Wed Aug 21, 2013 3:00 pm
 
Forum: Microbiology
Topic: staphylococcus aureus and biofilm formation
Replies: 3
Views: 3281
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