1887

Abstract

serovar Typhi (. Typhi) is the etiological agent of typhoid fever. To establish an infection in the human host, this pathogen must survive the presence of bile salts in the gut and gallbladder.

. Typhi uses multiple genetic elements to resist the presence of human bile.

To determine the genetic elements that . Typhi utilizes to tolerate the human bile salt sodium deoxycholate.

A collection of . Typhi mutant strains was evaluated for their ability to growth in the presence of sodium deoxycholate and ox-bile. Additionally, transcriptomic and proteomic responses elicited by sodium deoxycholate on . Typhi cultures were also analysed.

Multiple transcriptional factors and some of their dependent genes involved in central metabolism, as well as in cell envelope, are required for deoxycholate resistance.

These findings suggest that metabolic adaptation to bile is focused on enhancing energy production to sustain synthesis of cell envelope components exposed to damage by bile salts.

Funding
This study was supported by the:
  • Dirección General de Asuntos del Personal Académico, Universidad Nacional Autónoma de México (Award IN203621)
    • Principle Award Recipient: IsmaelHernández-Lucas
  • Dirección General de Asuntos del Personal Académico, Universidad Nacional Autónoma de México (Award IN203618)
    • Principle Award Recipient: IsmaelHernández-Lucas
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/content/journal/jmm/10.1099/jmm.0.001461
2022-01-10
2022-01-27
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