Table 2.

Broth microdilution susceptibilities and MIC distributions for all 107 single-patient A. baumannii-calcoaceticus complex isolates and for isolates by the presence or absence of the bla_OXA-23-like gene

Agent	Result for isolatesa:
	Total			With the blaOXA-23-like gene			Without the blaOXA-23-like gene
	MIC (μg/ml)		% S	MIC (μg/ml)		% S	MIC (μg/ml)		% S
	50%	90%		50%	90%		50%	90%
Imipenem	≥16	≥16	37.4	≥16	≥16	0	4	≥16	78.4
Meropenem	≥16	≥16	35.5	≥16	≥16	0	4	≥16	72.5
Doripenemb	≥16	≥16	3.7	≥16	≥16	0	4	≥16	3.7

^aAmong the total number of isolates, 56 (52.3%) had the bla_OXA-23-like gene and 51 (47.7%) lacked it. S, susceptible.

^bFDA breakpoints were applied (≤1 μg/ml).