TABLE 1.

Mean major axis dimension of K. pneumoniae cells in TEM images

Treatment (h)	β-Lactamase	Major axis length (μm) ± SD
		Air interface	Middle	Membrane
Control (0)	+	1.10 ± 0.28	1.30 ± 0.41	1.52 ± 0.42
Control (12)	+	1.06 ± 0.28	1.11 ± 0.34	1.29 ± 0.34
Control (12)	−	0.98 ± 0.22	1.13 ± 0.31	1.36 ± 0.31
Ciprofloxacin (12)	+	1.53 ± 0.57	1.08 ± 0.30	1.44 ± 0.83
Ampicillin (12)	+	0.91 ± 0.30	1.10 ± 0.58	1.32 ± 0.43
Ampicillin (12)	−	3.23 ± 1.40	2.08 ± 0.61	2.90 ± 0.94