Do Ticks Transmit Epidemic Typhus? No—Lice Do

Epidemic Typhus Transmission

Ticks do not transmit epidemic typhus. The disease is caused by Rickettsia prowazekii and spread through contact with infected body lice or their feces (rubbed into bite wounds or mucous membranes).

Key Distinctions

• Epidemic typhus – Louse-borne; associated with overcrowding, poor hygiene.
• Endemic (murine) typhus – Flea-borne (R. typhi).
• Tick-borne rickettsioses – e.g., Rocky Mountain spotted fever (R. rickettsii), different pathogens.

Prevention: delousing, improved sanitation, insecticide-treated clothing in outbreak settings.