For example, some E. coli strains produce a capsule called the K30 antigen (or K30 group I capsule) using the Wza multimeric protein translocon, which spans all the layers of the cell envelope (Fig. 9.15).
Kirby-Bauer disk diffusion susceptibility testingn.
p. 655
Kirby-Bauer disk diffusion susceptibility testing. Coagulase-negative S. aureus and E. coli were cultured on Mueller-Hinton agar with disks infused with different antibiotics ([...]).