Fig. 6. Presence of porin defects and copy number effects amongst isolates with WT-assigned alleles with genomes tested against 3GCs. Violin plots show the distribution of susceptibility testing measures, coloured by copy number, for WT SHV alleles (n = 1659 isolates tested against ceftazidime and n = 1937 isolates tested against ceftriaxone). EUCAST (v13.0) or CLSI (M100 33rd edition) I/R breakpoints are indicated using orange and blue lines, respectively.