This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Social & Preventive Medicine
Rickettia prowazaki causes: 
Select and explain. 
A. Epidemic typhus, B. Endemic typhus, C. Scrub typhus, D. Trench fever
A: Epidemic typhus
Answer: A: Epidemic typhus 
Explanation: (A) Epidemic typhus # R.prowazekii named after von Prowazek, who had contracted fatal typhus fever while investigating the disease.> Other diseases caused by Ricketisis are: Endemic typhus - R. typhi (mooseri) Tick typhus - R.rickettsii Scrub/CHIGGER Typhus - Borne -R. tsutsugamushi, R.orientalis Trench/five day fever - R. Quintana (Bartunella quintana)> Epidemic typhus is caused by R. prowazekii.