Medical MCQ-A patient presented with interstitial pneumonia,denied being bitten by insects.Of the following rickettsial diseases, which could have been caused without an insect bite?

A patient presented with interstitial pneumonia,denied being bitten by insects.Of the following rickettsial diseases, which could have been caused without an insect bite?

Scrub typhus

Rickettsial pox

Brill-Zinsser disease

Q fever

Question Category:

Microbiology

Correct Answer:

Q fever

Description:

- Since the patient denied of being bitten by insects, the most likely rickettsial disease is Q fever. - Since out of 4 option only Q fever has no ahropod transmission . - It is transmitted by aerosol. - It is caused by Coxiella burnetti. - No rash occur in Q fever In scrub typhus vector is trombiculid mite In rickettsial pox the vector is mite. Caused by Rickettsia akari Brill Zinsser's disease / recrudescent typhus is reactivation of epidemic typhus in the human body

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