Spectrum: Local Antimicrobial Stewardship, for Providence Health Care

Ampicillin - Antibiogram Data

Gram-Negatives
% of Isolates Susceptible

Proteus mirabilis61%
n = 281
Escherichia coli45%
n = 2745

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

Acinetobacter baumanniiR
n = 93
Citrobacter freundiiR
n = 38

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

Citrobacter koseriR
n = 52
Enterobacter cloacaeR
n = 215

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

Klebsiella aerogenesR
n = 74

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

Klebsiella oxytocaR
n = 148
Klebsiella pneumoniaeR
n = 619

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

Morganella morganiiR
n = 91

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

Pseudomonas aeruginosaR
n = 564

Excludes isolates from patients with cystic fibrosis (CF)

Serratia marcescensR
n = 147

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