Table 5.

Resistance and susceptibility of 105 Gram-negative bacteria.

A. baumannii

p < 0.0001 * (C)

Colistin ***, p < 0.0001 (Z)

Tigecycline ***, p = 0.0002 (Z)

C. freundii

p = 0.52 (C)

E. aerogenes

p = 0.92 (C)

E. cloacae

p = 0.0094 * (C)

Amoxicillin

clavulanic acid **, p = 0.0039 (Z)

E. coli

p < 0.0001 *(C)

Ampicillin **, p < 0.0001 (Z)

Cefotaxime **, p = 0.0015 (Z)

Ciprofloxacin **, p = 0.0002 (Z)

Amikacin ***, p = 0.0105 (Z)

Imipenem ***, p = 0.0318 (Z)

Meropenem ***, p = 0.0105 (Z)

Ertapenem ***, p = 0.0416 (Z)

K. oxytoca

p = 0.33 (C)

K. pneumoniae

p < 0.0001* (C)

Amoxicillin clavulanic acid **, p = 0.021 (Z)

Ampicillin **, p = 0.0391 (Z)

Piperacillin tazobactam **, p = 0.021 (Z)

Cefotaxime **, p = 0.0058 (Z)

Ceftazidime **, p = 0.0058 (Z)

Ciprofloxacin **, p = 0.0058 (Z)

Colistin ***, p < 0.0001 (Z)

Fosfomycin ***, p = 0.0238 (Z)

Tigecycline ***, p < 0.0001 (Z)

Trimethoprim-sulfamethoxazole ***, p < 0.0001 (Z)

P. mirabilis

p = 0.37 (C)

P. aeruginosa

p = 0.49 (C)

S. marcescens

p = 0.0142 * (C)

Amoxicillin clavulanic acid **, p = 0.0181 (Z)

Colistin **, p = 0.0181 (Z)

* = Significant test; ** = most frequent bacteria; C = multicomparison chi-squared test; Z = post-hoc Z-test; ** antibiotic more resistant; *** antibiotic more susceptible.