Rickettsia typhi is transmitted by which vector?

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Fleas are the vector for Rickettsia typhi, specifically rat fleas such as Xenopsylla cheopis. The bacteria inhabit the flea and are transmitted to humans when an infected flea bites or its contaminated feces are scratched into the skin, allowing entry. This pathogen causes murine typhus and is classically linked to environments with rats and fleas. The other arthropods listed are vectors for different rickettsial diseases—lice for epidemic typhus, and ticks or mosquitoes for other rickettsiae—so they do not transmit Rickettsia typhi.