Fig. 2: Cumulative MIC distribution for antibiotics alone or combined with potentiators (38 µM PAβN, 2.5 µM NV731 and NV716) against clinical isolates.

The vertical dotted line shows the human Cmax values for each antibiotic75,76 (a doxycycline; b chloramphenicol; c rifampicin; d ciprofloxacin). The table e shows the proportion of isolates for which MICs are below this Cmax value, and thus falls in the range of therapeutically-achievable concentrations. All MICs were determined in at least 2-3 independent experiments (if values differing of 1–2 dilutions were obtained, the most frequent one was considered).