Spectrum: Local Antimicrobial Stewardship, for Providence Health Care

Gentamicin - Antibiogram Data

Gram-Negatives
% of Isolates Susceptible

Serratia marcescens100%
n = 147

Organisms producing AmpC β-lactamases may develop resistance during prolonged therapy with 3° cephalosporins

Klebsiella aerogenes100%
n = 74

Organisms producing AmpC β-lactamases may develop resistance during prolonged therapy with 3º cephalosporins

Citrobacter koseri98%
n = 52
Pseudomonas aeruginosa95%
n = 564

Excludes isolates from patients with cystic fibrosis (CF)

Klebsiella oxytoca95%
n = 148
Acinetobacter baumannii95%
n = 93
Klebsiella pneumoniae93%
n = 619

11% of E. coli and 10% of K. pneumoniae isolates produce Extended Spectrum β-lactamases (ESBL)

Enterobacter cloacae92%
n = 215

Organisms producing AmpC β-lactamases may develop resistance during prolonged therapy with 3° cephalosporins

Proteus mirabilis90%
n = 281
Citrobacter freundii89%
n = 38

Organisms producing AmpC β-lactamases may develop resistance during prolonged therapy with 3° cephalosporins

Escherichia coli87%
n = 2745

11% of E. coli and 10% of K. pneumoniae isolates produce Extended Spectrum β-lactamases (ESBL)

Morganella morganii82%
n = 91

Organisms producing AmpC β-lactamases may develop resistance during prolonged therapy with 3° cephalosporins