Penicillin G

Background

Types

Antibiotic Sensitivities[1]
Group Organism Sensitivity
Gram PositiveStrep. Group A, B, C, GS
Strep. PneumoniaeS
Viridans strepI
Strep. anginosus gpS
Enterococcus faecalisS
Enterococcus faeciumI
MSSAR
MRSAR
CA-MRSAR
Staph. EpidermidisR
C. jeikeiumR
L. monocytogenesS
Gram NegativesN. gonorrhoeaeR
N. meningitidisS
Moraxella catarrhalisR
H. influenzaeR
E. coliR
Klebsiella spR
E. coli/Klebsiella ESBL+R
E coli/Klebsiella KPC+R
Enterobacter sp, AmpC negR
Enterobacter sp, AmpC posR
Serratia spR
Serratia marcescensX1
Salmonella spR
Shigella spR
Proteus mirabilisR
Proteus vulgarisR
Providencia sp.R
Morganella sp.R
Citrobacter freundiiR
Citrobacter diversusR
Citrobacter sp.R
Aeromonas spR
Acinetobacter sp.R
Pseudomonas aeruginosaR
Burkholderia cepaciaR
Stenotrophomonas maltophiliaR
Yersinia enterocoliticaR
Francisella tularensisX1
Brucella sp.X1
Legionella sp.R
Pasteurella multocidaS
Haemophilus ducreyiS
Vibrio vulnificusX1
MiscChlamydophila spR
Mycoplasm pneumoniaeR
Rickettsia spX1
Mycobacterium aviumX1
AnaerobesActinomycesS
Bacteroides fragilisR
Prevotella melaninogenicaS
Clostridium difficileX2
Clostridium (not difficile)S
Fusobacterium necrophorumI
Peptostreptococcus sp.S

Key
  • S susceptible/sensitive (usually)
  • I intermediate (variably susceptible/resistant)
  • R resistant (or not effective clinically)
  • S+ synergistic with cell wall antibiotics
  • U sensitive for UTI only (non systemic infection)
  • X1 no data
  • X2 active in vitro, but not used clinically
  • X3 active in vitro, but not clinically effective for Group A strep pharyngitis or infections due to E. faecalis
  • X4 active in vitro, but not clinically effective for strep pneumonia

See Also
  1. Sanford Guide to Antimicrobial Therapy 2014
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