Interpretive criteria of antimicrobial disk susceptibility tests with cefpodoxime

The interpretation of disk susceptibility testing with 30 micrograms cefpodoxime disks was evaluated on the basis of regression line analyses and preliminary MIC breakpoints of 2 and 4 mg/l. Using the DIN-58940 method, zone diameters up to 23 mm are resistant, 24 to 26 mm moderately susceptible, and 27 mm or more susceptible. The respective data for the NCCLS method are: up to 21 mm, 22 to 23 mm, and 24 mm or more.