6.2 Staph aureus Flashcards Preview

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Flashcards in 6.2 Staph aureus Deck (8):
1

What is the appearance of staph aureus?

Gram positive cocci in clusters

2

What is staph aureus positive for?

Coagulase and DNase

3

Where does Staph aureus colonise?

Anterior nares (axilla and perineum)

4

How does staph aureus differ from coagulase negative species?

Can be a colonizer
Coagulase and DNase positive
Clumping factor
>20 adhesion genes
> 30 toxin genes

5

What does an adhesion do?

coordinates binding of the organism to a host tissue

6

What does an invasin do?

enable the organism to invade a host cell

7

What does an impedin do?

enables the organism to avoid one or most of the host defences

8

what does a modulin do?

induces damage to the host indirectly