Ultrastructural Changes in Clinical and Microbiota Isolates of Klebsiella pneumoniae Carriers of Genes bla_SHV, bla_TEM, bla_CTX-M, or bla_KPC When Subject to β-Lactam Antibiotics

Table 2

MICs of K. pneumoniae isolates obtained of microbiota and sub-MICs used for analysis by electron microscopy.

Isolates	Ampicillin (μg mL^−1)			Amoxicillin (μg mL^−1)
	MICs	Sub-MICs		MICs	Sub-MICs
		TEM	SEM		TEM	SEM
K58.1-F	16	0.5; 2; 8	0.5; 8	32	0.5; 4; 16	0.5; 16
K21.1-F	128	0.5; 16; 32; 64	16; 32; 64	>128	0.5; 4; 16; 64; 128	0.5; 16; 128

MICs: minimum inhibitory concentrations; sub-MICs: sub-minimum inhibitory concentrations; TEM: transmission electron microscopy; and SEM: scanning electron microscopy.