Table 1.

Bacterial strains

Strains	Relevant characteristics‡‡
DH5α	Laboratory strain derived from E. coli K-12, NM
EMO*	Plasmid-free E. coli from human colon flora, M
ATCC14028†	Virulent S. typhimurium strain, M
SB856‡	sopE∷aphT mutation in S. typhimurium SL1344, M
TH714§	fljB5001∷MudJ mutation in S. typhimurium LT2, M
VV341¶	hilA∷kan-339 mutation in SL1344, M
SIN14	hilA∷kan-339 in ATCC14028, M
SIN18	sopE∷aphT in ATCC14028, M
SIN20	fliC∷aphT from SEFK32 strain in ATCC14028, M
SIN22	fljB5001∷MudJ in ATCC14028, M
SE857‖	Virulent S. enteritidis strain, M
SEFK32‖	fliC∷aphT mutation in SE857, NM
B. vulgatus*	Gram− anaerobe from human colon, NM
B. bifidum*	Gram+ anaerobe from human colon, NM
LO28**	Virulent L. monocytogenes strain, M

Strains were obtained from  

^*V. Gaboriau-Routhiau,  

^†American Type Culture Collection,  

^‡J. Galan,  

^§K. Hughes,  

^¶C. Lee,  

^‖F. Van Asten, and  

^**P. Berche. 

^‡‡ kan, MudJ, and aphT encode cassettes for resistance to kanamycin; M, motile; NM, nonmotile.