Table 2.

MICs of antibiotic substances and swimming motility and virulence of S. enterica serovar Typhimurium strain χ3761 and its derivatives

Strain	Genotype	MIC (mg/ml)		Motility (mm)b	LD50 (CFU)c
		DOCa	Polymyxin B
χ8573	ΔmsbB48	6.25	<0.032	41.5 ± 2.5	4.5 × 105
χ11165	ΔmsbB48 ΔpagL7	6.25	<0.032	42 ± 2	7 × 105
χ9908	ΔmsbB48 ΔpagP8	6.25	<0.032	32 ± 2	2.4 × 105
χ9949	ΔmsbB48 ΔlpxR9	3.1	<0.032	38.5 ± 2.5	1.4 × 105
χ11065	ΔmsbB48 ΔpagL7 ΔpagP8 ΔlpxR9	6.25	<0.032	36 ± 1	1.4 × 105
χ3761	Wild-type UK1	6.25	0.59	40.5 ± 0.5	1.3 × 104

^aDOC, deoxycholate (bile salt).

^bColony diameter in mm after 7 h of growth on the LB agar plate.

^cThe data are based on probit analysis.