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The study examines the role of typhoid toxin in enteric fever and its impact on immunovascular health.

April 29, 2026Microbiology and Molecular Biology Reviews0 citations

Typhoid toxin: reframing enteric fever

Key Points

The study examines the role of typhoid toxin in enteric fever and its impact on immunovascular health.
Analyzed the mechanism of typhoid toxin secretion via the type 10 secretion system.
Investigated the relationship between typhoid toxin and various health conditions including leukopenia and intestinal perforation.
Explored the implications of modular B-subunit exchange on receptor usage and tissue tropism.
Typhoid toxin is linked to immune dysfunction and leukopenia.
Demonstrated that typhoid toxin contributes to blood-brain barrier disruption and encephalopathy.
Identified new therapeutic targets in neutralizing antibodies and barrier protection.

Abstract

-containing vacuole (SCV), secreted across the bacterial envelope into the SCV lumen by a phage-derived pathway now classified as type 10 secretion system, sorted for export by the host CI-M6PR/COPII trafficking machinery, and then re-enters distant target cells via retrograde transport to the endoplasmic reticulum (ER). Recent work has linked typhoid toxin to leukopenia, blood-brain barrier disruption causing encephalopathy, gut-vascular and immune dysfunction leading to intestinal perforation, and hepatobiliary injury. The discovery of an alternate B-subunit (PltC) established a paradigm of modular B-subunit exchange that diversifies receptor usage, tissue tropism, and biology. Collectively, these insights redefine typhoid fever as a toxin-driven immunovascular disease and identify actionable targets for neutralizing antibodies and barrier-protective therapies.

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