Phenotypic characterization of the Egyptian isolates “extensively drug-resistant Pseudomonas aeruginosa” and detection of their metallo-β-lactamases encoding genes

Bulletin of the National Research Centre

Table 5 MIC distributions for piperacillin/tazobactam antibiotic against 59 carbapenem resistant P. aeruginosa isolates

Antibiotics			No (cumulative%) of isolates at MIC (μg/ml)						MIC₅₀	MIC₉₀	Range
Antibiotics	4/4	8/4	16/4	32/4	64/4	128/4	256/4	512/4	MIC₅₀	MIC₉₀	Range
Piperacillin/tazobactam	1(1.6)	1(1.6)	7(11.8)	9(15.2)	18(30.5)	19(32.2)	2(3.3)	2(3.3)	64/4	128/4	16/4–512/4