Infection: Steptococcus pyogenes Flashcards
1
Q
What is the classification of streptococcus pyogenes?
A
Gram positive cocci (appear as a string of beads)
2
Q
Where is strep pyogenes usually found on the body?
A
Part of the normal skin flora
3
Q
What are the methods of transmission of strep pyogenes?
A
Via respiratory droplets
Direct contact with skin
From cattle to humans via contaminated food
4
Q
What infections are caused by strep pyogenes?
A
Upper resp tract infections eg pharyngitis
Skin and soft tissue infections
Acute glomerulonephritis
Scarlet fever - throat infections which release toxins
5
Q
What are some of strep pyogenes virulence factors?
A
- Has a hyaluronic acid capsule which protects the bacterium from phagocytosis
- M protein in the cell wall prevents opsonisation
6
Q
How are strep pyogenes infections treated?
A
Sensitive to penicillin
if allergic give erythromycin
