Table 1.

Phenotypes of resistance of 146 strains of P. aeruginosa, as defined by clinical categories, to ceftazidime and ticarcillin, imipenem, meropenem, and ciprofloxacina

PhenotypeCAZ, TICIPMMEMCIPNo. (%) of strains
Basal resistanceSSSS48 (32.9)
CIPrSSSR26 (17.8)
CAZrRSSS19 (13.0)
IPMrSRS, I, RbS22 (15.1)
CAZ-IPMrRRS, I, RcS, Rd21 (14.4)
Not namedRSSR7 (4.8)
Not namedSRSR3 (2.0)
  • a Abbreviations: CAZ, ceftazidime; TIC, ticarcillin; IPM, imipenem; MEM, meropenem; CIP, ciprofloxacin; CIPr, ciprofloxacin resistant; CAZr, ceftazidime resistant; IPMr, imipenem resistant; S, susceptible; I, intermediate; R, resistant.

  • b Susceptible, n = 7 ; intermediate, n = 11 ; resistant, n = 4 .

  • c Susceptible, n = 2 ; intermediate, n = 10 ; resistant, n = 9 .

  • d Susceptible, n = 10 ; resistant, n = 11 .