The Salmonella enterica serotype Typhi Vi capsular antigen is expressed after the bacterium enters the ileal mucosa.

@article{Tran2010TheSE,
  title={The Salmonella enterica serotype Typhi Vi capsular antigen is expressed after the bacterium enters the ileal mucosa.},
  author={Quynh T Tran and Gabriel Gomez and Sangeeta Khare and Sara D Lawhon and Manuela Raffatellu and Andreas J B{\"a}umler and Dharani K. Ajithdoss and Soma S. Dhavala and Leslie Garry Adams},
  journal={Infection and immunity},
  year={2010},
  volume={78 1},
  pages={527-35}
}
Salmonella enterica serotype Typhi, the etiological agent of typhoid fever, produces the Vi capsular antigen, a virulence factor absent in Salmonella enterica serotype Typhimurium. Previous studies suggest that the capsule-encoding viaB locus reduces inflammatory responses in intestinal tissue; however, there are currently no data regarding the in vivo expression of this locus. Here we implemented direct and indirect methods to localize and detect Vi antigen expression within polarized… CONTINUE READING
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