TABLE 1.

Virulence of Salmonella enterica serovar Typhimurium flagellar mutants

Bacterial strain	No. of dead mice/no. infecteda	Oral LD50b (CL)c
SL3201	10/10	1.5 × 105 (9 × 105–2.5 × 104)
SL3201 fljB::MudJ fliC::Tn10	10/10	1.0 × 105 (3.0 × 105–3.3 × 104)
SL3201 flhD::Tn10	10/10	1.4 × 104 (2.4 × 104–8.8 × 103)

^aIntraperitoneal injection of ∼700 CFU. The data are from two experiments. 

^bThe LD₅₀ values of each strain administered orally were determined at least twice by probit analysis (29, 40), and the mean values are presented in CFU. 

^cCL, 95% confidence limits.