Fig. 5.

Effects of β-lactam–β-lactamase inhibitor combinations on bacterial length of E. coli. Reference strain E. coli, ESBL-producing E. coli, and a blood culture E. coli was treated with 4 different concentrations of either piperacillin alone (a–c) or with supplementation of tazobactam (d–f) as well as ticarcillin alone (g–i) or with supplementation of clavulanic acid (j–l). Bacterial length was measured repeatedly every 15 min for 10 h