Organism that does NOT need vector for transmission:
Coxiella burnetii causes Q fever. Q fever transmission differs from other rickettsial infection in that there is no ahropod involved in its transmission to man. Transmission results from inhalation, ingestion, abrasion or directly in conjunctiva. Ref: Park 21st edition, page 276.
Rickettsia prowazekii
Rickettsia rickettsii
Coxiella burnetii
Borrelia recurrentis