Flashcards in 6.2 Staph aureus Deck (8):
What is the appearance of staph aureus?
Gram positive cocci in clusters
What is staph aureus positive for?
Coagulase and DNase
Where does Staph aureus colonise?
Anterior nares (axilla and perineum)
How does staph aureus differ from coagulase negative species?
Can be a colonizer
Coagulase and DNase positive
>20 adhesion genes
> 30 toxin genes
What does an adhesion do?
coordinates binding of the organism to a host tissue
What does an invasin do?
enable the organism to invade a host cell
What does an impedin do?
enables the organism to avoid one or most of the host defences