Figure 2

MIC distributions of cefazolin and imipenem in Proteus mirabilis . Data for cefazolin and imipenem are from 786 and 1157 isolates, respectively (cefazolin was not tested in 2010 and 2012) in the Taiwan Surveillance of Antimicrobial Resistance (TSAR) 2002 to 2012 program. The susceptible, intermediate, and resistant breakpoints (2009 vs. current) are < = 8, 16, and > =32 vs. <= 2, 4, and > =8 mg/L for cefazolin; and < = 4, 8, and > =16 vs. <= 1, 2, and > =4 mg/L for imipenem. Numbers on top of the bars represent % of isolates with that MIC value.