Figure 4

Deformation caused by antimicrobial action in five gram-negative bacilli species, Escherichia coli (ATCC 25922), Acinetobacter baumannii (ATCC 15151), Enterobacter cloacae (ATCC 13047), Klebsiella pneumoniae (ATCC 10031), Pseudomonas aeruginosa (ATCC 27853). Bacterial images when type 1 of low-bright was reduced to approximately 50% or less after the start of imipenem or colistin administration; for colistin-treated ATCC 15151 at the time of type 1 decrease (see Fig. 3). Arrowheads indicate examples of bacteria classified as type 1 (blue), type 2 (red), and type 3 (gray). Red arrows indicate bulging.