The vector which transmits trench fever -: (A) Tick, (B) Mite, (C) Flea, (D) Louse
Answer is C. Trench fever is caused by Rickettsia quintana. The vector being lice. Other diseases transmitted by lice include epidemic typhus, dermatitis, relapsing fever. REFERENCE: PARK'S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICINE, 25TH EDITION, PG NO. 837