How long does Salmonella typhi (S typhi) survive in asymptomatic carriers?

Updated: Aug 19, 2019
  • Author: John L Brusch, MD, FACP; Chief Editor: Michael Stuart Bronze, MD  more...
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Answer

Chronic carriers are responsible for much of the transmission of the organism. While asymptomatic, they may continue to shed bacteria in their stool for decades. The organisms sequester themselves either as a biofilm on gallstones or gallbladder epithelium or, perhaps, intracellularly, within the epithelium itself. [7] The bacteria excreted by a single carrier may have multiple genotypes, making it difficult to trace an outbreak to its origin. [8]


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