part 5 Flashcards
1
Q
Why are penicillins commonly used?
A
- active against a variety of bacteria
- direct toxicity is low
2
Q
What is the principal adverse effect of penicillins?
A
allergic reaction
3
Q
What categorie is penecillin in?
A
B-Lactam - contains a beta-lactam in their structure
4
Q
What is the mechanism of action B-Lactam/penicillins?
A
disruption of the bacterial cell wall
5
Q
Why are penicillins considered safe?
A
no direct effect on the cells of the host
6
Q
What is MRSA resistant to?
A
Methicillin a form of penicillin
7
Q
Is MRSA gram + or -?
A
gram positive
8
Q
Where does MRSA colonize?
What does it cause and infect?
A
- colonizes the skin and nostrils of healthy people
- causes abscesses, boils, cellulitis, and impetigo
- can infect lungs and bloodstream = fatal
- can cause serious infections: necrotizing fasciitis, necrotizing pneumonia, sepsis
9
Q
How is MRSA transmitted?
A
- skin to skin
- contaminated objects
10
Q
How do we prevent transmission of MRSA?
A
hand washing
