TABLE 1.

Bacterial strains used in this study

StrainRelevant characteristic(s)Reference(s)
Y. enterocolitica 8081Biotype 1B, serotype O:8 23
Y. enterocolitica 8081u Y. enterocolitica 8081 ureF::Kmr 4
S. enterica serovar Typhimurium SL1344Resistant to streptomycin 11
C. rodentium ICC169Resistant to nalidixic acid 7, 37
C. perfringens JIR4472SM101(pJIR1841), spore forming, resistant to chloramphenicolV. Adams, D. Lyras, and J. I. Rood, unpublished