Table 2.

Antibiotic-resistance patterns of ESBL- and MBL-producing strains

	% Resistance
ESBL-producing P. aeruginosa (n=54)	MBL-producing P. aeruginosa (n=11)
Azlocillin	100	100
Amoxicillin– clavulanic acid	100	100
Ampicillin/sulbactam	100	100
Tobramycin	81.5	45.5
Aztreonam	83.3	54.5
Cefepime	100	72.7
Polymyxin B	74.1	54.5
Cefoperazone	90.8	54.5
Colistin sulfate	37	36.4
Levofloxacin	55.6	36.4
Amikacin	55.6	63.6
Ciprofloxacin	35.2	36.4
Piperacillin	51.9	54.5
Gentamicin	46.3	63.6
Imipenem	5.6	100
Meropenem	7.4	100
Carbenicillin	46.3	72.7
Tigecycline	42.6	45.5

Abbreviations: ESBL, extended-spectrum β-lactamase; MBL, metallo-β-lactamase; P. aeruginosa, Pseudomonas aeruginosa.