TABLE 1.

Bacterial strains and plasmids used in this study

L. monocytogenes strain or plasmidRelevant genotype or characteristicsReference or source
Strains
    EGD-eWild-type serotype 1/2a strain17
    ΔsigB mutantEGD-e ΔsigB9
    EGD-e:Pr.sigB-EGFPEGD-e: genomic expression of EGFP from the sigB promoter using plasmid pIMK-Pr.sigB-EGFPThis study
    sigB-c mutantEGD-e ΔsigB: genomic complementation of sigB using plasmid pIMK-sigBThis study
Plasmids
    pIMK2-EGFPKanr; pIMK2 derivative containing EGFP46
    pIMK-Pr.sigB-EGFPKanr; pIMK2-EGFP derivative containing the sigB promoter in front of EGFPThis study
    pIMK-sigBKanr; pIMK2-EGFP derivative containing the sigB geneThis study