Rickettsia causes which of the following diseases?

Rickettsia is a genus of bacteria known for causing a variety of diseases primarily transmitted by arthropod vectors such as ticks, fleas, and lice. The diseases associated with Rickettsia include typhus, which can manifest in different forms such as epidemic typhus and murine typhus, as well as Q fever and scrub typhus.

Typhus is characterized by fever and a distinct rash, while Q fever is caused by Coxiella burnetii, often grouped with Rickettsial diseases due to its similar transmission routes and pathogenic features but should not be confused as it is technically from a different genus. Scrub typhus is caused by a specific type of Rickettsial organism, Orientia tsutsugamushi, and is also characterized by fever and a rash.

This knowledge indicates that the correct answer encompasses all diseases related to Rickettsia, affirming choice B as accurate, given its acknowledgment of typhus and scrub typhus as Rickettsial diseases.

In contrast, pneumonia is generally caused by a range of bacteria, viruses, and fungi but is not specifically associated with Rickettsia. Gonorrhea is an infection caused by Neisser