Table I.

Bacterial strains used in this study

StrainsCharacteristicsSource/Ref. No.
S. typhimurium
 SL3201Wild-type; phase variable (fljB/fliC)11
 SL3201 fliCfliC::Tn1011
 SL3201 fljBfljB::MudJ11
 SL3201 fliC/fljBfliC::Tn10 fljB::MudJ11
flhDflhD::Tn10 from KK204011
 KK1004Wild-type of fliD13
fliDfliD::kan13
 SR11Wild-type of invA14
invAinvA::kan14
 TML-83Wild-type of invG15
invGinvG::kan15
 SL1344Wild-type of Δspi-1, mouse-virulent strain10
 Δspi-1Δspi-1::kan10
E. coli
E. coli 7Aflagellate E. coli commensal11
E. coli 4Flagellated E. coli commensal11
S. typhi
S. typhiWild typeClinical isolate