Question:
Endemic typhus is transmitted by which vector?
Endemic typhus is transmitted by which vector?
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Endemic (murine) typhus equals Rickettsia typhi, spread by the rat flea.
Updated On: Jun 24, 2026
- Louse
- Flea
- Tick
- Mite
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The Correct Option is B
Solution and Explanation
Step 1: The typhus group of rickettsial diseases is split by vector. Knowing the vector of each form lets you separate endemic from epidemic typhus.
Step 2: Endemic (murine) typhus is caused by Rickettsia typhi and is transmitted by the rat flea (Xenopsylla cheopis). This matches option b, Flea.
Step 3: The distractors map to other diseases. Epidemic typhus (Rickettsia prowazekii) is spread by the body louse, tick typhus or spotted fever by ticks, and scrub typhus (Orientia tsutsugamushi) by the trombiculid mite.
Step 4: Therefore the vector of endemic typhus is the flea, option b.
Step 2: Endemic (murine) typhus is caused by Rickettsia typhi and is transmitted by the rat flea (Xenopsylla cheopis). This matches option b, Flea.
Step 3: The distractors map to other diseases. Epidemic typhus (Rickettsia prowazekii) is spread by the body louse, tick typhus or spotted fever by ticks, and scrub typhus (Orientia tsutsugamushi) by the trombiculid mite.
Step 4: Therefore the vector of endemic typhus is the flea, option b.
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