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Table 5 Fractional inhibitory concentration (FIC) index of the checkerboard procedure in 42 A. baumannii isolates

From: Effects of a combination of amlodipine and imipenem on 42 clinical isolates of Acinetobacter baumannii obtained from a teaching hospital in Guangzhou, China

Combination of compounds FIC index (N,%)
<0.5 Synergy 0.5 to 0.75 partial synergy 0.76 to 1.0 additive effect >1.0 to 4.0 indifference >4.0 antagonism
Imipenem + AML 6 (14.3%) 15 (35.7%) 10 (23.8%) 11 (26.2%) 0 (0%)
  1. The concentrations of imipenem and AML used in the checkerboard procedure depended on the MICs of each A. baumannii isolate tested.