PATHOLOGY

Detailed explanation-1: -The arthropod vector of epidemic typhus is the body louse (Pediculus corporis). This is the only vector of the typhus group in which humans are the usual host. Rickettsia prowazekii, which is the etiologic agent of typhus, lives in the alimentary tract of the louse.

Detailed explanation-2: -Australian ticks can cause illness, including Rickettsial infections, Q fever, allergic reactions, paralysis and mammalian meat allergy.

Detailed explanation-3: -Endemic typhus fever is not spread from person-to-person. Disease is spread by rat fleas infected with the bacteria that cause endemic typhus fever. Rat fleas become infected when they feed on the blood of a rat with endemic typhus fever.