Distributions of MICs of tigecycline among 2,339 isolates of carbapenem-nonsusceptible A. baumannii (A) and 387 isolates of carbapenem-susceptible A. baumannii (B) as determined by the agar dilution method and interpreted using tigecycline MIC interpretive breakpoints for Enterobacteriaceae recommended by the FDA (susceptible [S], ≤2 μg/ml; intermediate [I], 4 μg/ml; and resistant [R], ≥8 μg/ml), 2008 to 2010.