Antimicrobial activity of NZX. (a) NZXs impact on fast growing and slow growing bacteria. NZX showed potent activity on both fast growing (black) and slow growing (white) clinical NTM isolates, and clinical Gram-positive isolates (grey). We could not observe any clear-cut differences in MIC99 values between slow growing strains and fast growing NTM strains. The pie-chart is showing the concentrations of NZX needed to kill the different bacteria. (b) Heatmap showing the unique distribution profiles of resistance to NZX (MIC99) on three clinical isolates of each bacteria.