Plasmids used in this study.

*Abbreviations and nomenclature: OSA for O-specific antigen. eYFP for enhanced yellow fluorescent protein. msfGFP for monomeric superfolder green fluorescent protein. mKate is a red fluorescent protein. CamR for chloramphenicol resistant. AmpR for ampicillin resistant. SacB is the Bacillus subtilis levansucrase gene. TetR for tetracycline resistant. KmR for kanamycin resistant, and GmR for gentamycin resistant.