7 - Staphylococcus Flashcards
1
Q
Is Staphylococcus gram positive or gram negative?
A
Gram positive
2
Q
What shape is Staphylococcus?
A
Coccoid
3
Q
How does Staphylococcus respire?
A
Facultative anaerobe
4
Q
What medium is used to isolate Staphylococcus?
A
Mannitol salt agar:
- S. aureus causes colour change from pink to yellow (ferments mannitol)
- S. epidermidis does not cause a colour change
Blood agar
Baird-Parker agar:
- Coagulase positive Staphylococci form black colonies
5
Q
Is Staphylococcus catalase positive or negative?
A
Catalase positive
6
Q
How is S. aureus differentiated from other Staphylococcus species?
A
S. aureus is coagulase positive
