This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Communicable diseases, Subject name: Social & Preventive Medicine
Which of the following statements is true about endemic typhus - 
Select and explain. 
A. Is caused by R. Rickettsii, B. Is transmitted by the bite of fleas, C. Has no mammalian reservoir, D. Can be cultured in chemically defined culture medium
B: Is transmitted by the bite of fleas
Answer: B: Is transmitted by the bite of fleas 
Explanation: <p> Endemic or flea-borne typhus or murine typhus is transmitted by bite of flea. Rats are the reservoir. Causative agent is Rickettsia typhus. Park&;s textbook of preventive and social medicine,K.Park,23rd edition,page no:300 <\p>