TABLE 1.

MIC distributions for various antimicrobials tested during the 2002 MYSTIC Program in North America

Species (no.) or antimicrobial agent% of isolates susceptible at MIC (μg/ml) of:
0.0080.0160.030.060.120.250.51248163264128256
E. coli (433)
    Meropenem61.77.220.82.82.12.31.91.400000000
    Imipenem00013.264.412.27.62.30.20000000
    Ceftazidime00048.56.525.27.65.31.20.50.90.53.50.20.20
    Cefepime00092.60.34.81.20.90.30000000
    Piperacillin-tazobactam00000.72.17.239.532.810.23.71.40.20.50.51.4
    Ciprofloxacin2.55.12.51.471.84.20.94.205.30.20.50.70.50.20
K. pneumoniae (288)
    Meropenem5.21.075.37.32.46.61.00.40.4000.40000
    Imipenem0004.256.627.410.800.40.40000.400
    Ceftazidime00049.35.218.18.77.61.000.40.48.70.400.4
    Cefepime001.890.80.53.20.50.50.50.91.400000
    Piperacillin-tazobactam00000.72.43.116.037.223.66.94.91.00.70.72.8
    Ciprofloxacin00.47.32.468.110.48.01.40.71.0000000.4
A. baumannii (109)
    Meropenem0003.76.423.022.016.510.16.42.81.85.50.900.9
    Imipenem000.9013.828.422.916.54.63.80.96.40.9000.9
    Ceftazidime0000000.911.011.020.217.47.331.2000.9
    Cefepime000001.32.711.512.812.814.119.224.41.300
    Piperacillin-tazobactam00.90019.35.55.53.76.44.611.94.68.35.59.214.7
    Ciprofloxacin0004.635.86.46.415.61.826.60002.800
P. aeruginosa (427)
    Meropenem0.20.21.65.414.117.122.717.85.96.62.82.11.21.21.20
    Imipenem0000.21.24.212.744.518.75.63.55.22.10.901.2
    Ceftazidime00000.20.72.815.037.719.28.74.98.0002.8
    Cefepime000000.92.417.428.621.217.76.85.0000
    Piperacillin-tazobactam00000.70.92.13.513.836.813.811.76.13.53.04.0
    Ciprofloxacin000.52.349.27.59.44.74.218.50.20.20.20.91.20.9