From search of external encyclopedias:
Spotted fever rickettsiosis (Biology) [Tick-borne diseases] [Zoonoses] [Rickettsioses] Group of bacterial diseases ...
Louse-feeder (Biology) [Bioethics] [Rickettsioses] Human fed to typhus-infected lice ...
Orientia tsutsugamushi (Biology) [Rickettsioses] [Rickettsiaceae] Species of bacterium ...
Robert Edmund Scoresby-Jackson (Medicine) [Rickettsioses] British physician and historian ...