TABLE 3

Comparison of 7 plate types regarding MIC versus E. coli ATCC 25922 in Mueller-Hinton broth in the presence and absence of Tween 80 (polysorbate 80)

PlateMediumMIC (µg/ml) by antibiotic
ColistinCiprofloxacinOxacillinTrimethoprimPolymyxin BPenicillin GRifampin
Nunc flat TC−T801–2≤0.03>640.25–0.5132–644
+T801–2≤0.03>640.25–0.52648
Nunc U TC−T800.5–1≤0.03>640.25–0.51–4324–8
+T802≤0.03>640.25–0.52–4648
Nunc PS−T800.125–1≤0.03>640.250.125–0.25324
+T80≤0.030.06–0.125>640.25–0.50.03–0.06644–8
Corning NBS−T80≤0.03≤0.03>640.25–0.5≤0.03644–8
+T80≤0.03≤0.03>641≤0.03648
Corning PS−T800.06≤0.03>640.25–0.50.0632–644–8
+T80≤0.03≤0.03>641–20.03–0.25648–16
Corning TC−T800.5–1≤0.03>640.25–0.51–2324–8
+T801≤0.03>640.5–12648
Trek PS−T80≤0.03≤0.03>640.5–10.06–0.125644
+T80≤0.03≤0.03>6420.03–0.0632–648–16