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Table 3 Checkerboard assay of gentamicin and PACs against P. aeruginosa, showing the decrease (potentiation) of the gentamicin MIC by the addition of PAC

From: Cranberry proanthocyanidins have anti-biofilm properties against Pseudomonas aeruginosa

  [Gentamicin] (μg/mL)
[PAC] (μg/mL)   1.7 1.6 1.5 1.4 1.3 1.2 1.1 0
100 0.081 0.084 0.079 0.088 0.178 0.698 0.841 1.74
10 0.066 0.066 0.069 0.067 0.093 0.439 0.693 1.746
1 0.057 0.055 0.054 0.059 0.07 0.461 1.137 1.743
  0.1 0.108 0.056 0.053 0.06 0.056 0.903 1.687 1.774
  0.01 0.056 0.054 0.063 0.053 0.062 1.002 1.197 1.794
  0 0.054 0.061 0.055 0.241 0.647 1.267 1.727 1.806
  1. Bold value indicates point of synergy.