What is the vector associated with Rickettsia typhi

What is the vector associated with Rickettsia typhi

• A. Flea
• B. Tick
• C. Louse
• D. Mosquito

Answer: (A)

Rickettsia typhi is transmitted by fleas, specifically rat fleas such as Xenopsylla cheopis. In murine typhus, rats serve as the main reservoir and fleas acquire the bacterium while feeding. Transmission to humans occurs when fleabeces infected with R. typhi are scratched into the skin or come into contact with mucous membranes, rather than through the bite itself. This makes fleas the correct vector. Other options align with other rickettsial diseases (lice for some typhus strains, ticks for spotted fever group, mosquitoes not typically a vector for R. typhi), but for R. typhi the flea is the key carrier.

Rickettsia typhi is transmitted by fleas, specifically rat fleas such as Xenopsylla cheopis. In murine typhus, rats serve as the main reservoir and fleas acquire the bacterium while feeding. Transmission to humans occurs when fleabeces infected with R. typhi are scratched into the skin or come into contact with mucous membranes, rather than through the bite itself. This makes fleas the correct vector. Other options align with other rickettsial diseases (lice for some typhus strains, ticks for spotted fever group, mosquitoes not typically a vector for R. typhi), but for R. typhi the flea is the key carrier.