Spectrum: Local Antimicrobial Stewardship, for UCLA Health

Penicillin G - Antibiogram Data

Gram Positive - Pooled
% of Isolates Susceptible

Streptococcus pyogenes / Group A Strep100%
n = 40
Streptococcus Group B100%
n = 109
Streptococcus anginosus group99%
n = 79
Streptococcus, Viridans group69%
n = 117

Resistant includes 29% Intermediate (MIC 0.25-2 μg/ml) and 2% High-level (MIC >2 μg/ml) resistance

Excluding Streptococcus anginosus

Staphylococcus lugdunensis50%
n = 382

S. lugdunensis is best treated with a Beta-lactam agent

Staphylococcus aureus<10%
n = 2639

See "General Susceptibility" for more information.

Staphylococcus epidermidis<10%
n = 469
Staphylococcus pseudintermedius<10%
n = 66
Staphylococci, coagulase negative<10%
n = 169

See "General Susceptibility" for more information.

Streptococcus pneumoniae92%*
n = 52

*Patients with meningitis. In patients without meningitis, %S = 62