MRSA

Question 1

two subtypes of MRSA

Answer 1

CA MRSA
HA MRSA

Question 2

Definitions of MRSA

Answer 2

any strain of S aureus that has developed multiple drug resistance to beta lactam antibiotics. (e.g. oxacillin, penicillin, and amoxicillin)

Question 3

Definition of MSSA

Answer 3

any strain of S aureus susceptible (able to be killed by) beta lactam antibiotics

Question 4

most frequently reported clinical manifestations of MRSA

Answer 4

SSTI’s, furuncles, carbuncles, and abscesses.

Question 5

What sx should raise suspicion of a S Aureus infection?

Answer 5

“spider bite”

Question 6

key features of MRSA

Answer 6

localized erythema with induration and possible drainage
abcess (fluctuant mass)
positive MRSA culture

Question 7

Mainstay of MRSA treatment

Answer 7

incision, drainage, and irrigation followed by packing, dressing changes, and oral antibiotics

Question 8

wound treatment of MRSA

Answer 8

anything that tracks further than 1-1.5 inches should be sent to Gen Surg.
no fluctuant mass, ABX x2 days, F/U for I and D.

Question 9

Antibiotics for MRSA

Answer 9

TMP-SMX
Clinday
Doxy

Question 10

untreated MRSA leads to what conditions

Answer 10

sepsis, endocarditis, osteomyelitis, and necrotizing fasciitis.