Clinically important Gram + pathogens

Question 1

Staphylococcus aureus

Answer 1

Gram + in clusters, coagulace +
Nose and Skin
MSSA- oxacillin, cefazolin
MRSA- Vancomycin, daptomycin or linezolid

Question 2

Staphylococcus epidermidis

Answer 2

Gram + clusters
skin. Coagulase -
MSSE- oxacillin, cefazolin
MRSE- vancomycin, daptomycin, linezolid with or without rifampin

Question 3

Staphylococccus saprophyticus

Answer 3

G ram + clusters, Coagulase -
genital, perineum
Bactrim, nitrofurantoin

Question 4

Viridians streptococci

Answer 4

Gram + in chains/pairs
alpha hemolytic
oral
penicillin, amoxicillin

Question 5

Streptococcus pneumoniae

Answer 5

Gram + chains and pairs
alpha hemolytic
URT
penicillin, azithromycin, ceftriaxone, respiratory fluoroquinolones, vancomycin

Question 6

Streptococcus agalactiae

Answer 6

Gram + chains and pairs
beta-hemolytic
vagina/GI
Penicillin, amoxicillin

Question 7

Streptococcus pyogens

Answer 7

Gram+ chains and pairs
Beta-hemolytic
Skin/throat
penicillin, amoxicillin

Question 8

Enterococcus

Answer 8

Gram + chains and pairs
y-hemolytic
GI
ampicillin, vancomycin with or without aminoglycoside.
VRE- daptomycin, linezolid.