Some disease-causing rickettsiae

rickettsia arthropod vector vertebrate host human disease

Genus Rickettsia

typhus group

R. prowazekii body louse humans epidemic typhus, Brill-Zinsser disease

R. typhi (or mooseri) rat flea rats murine typhus

spotted fever group

R. rickettsii tick rodents Rocky Mountain spotted fever

R. conorii tick dogs boutonneuse fever

scrub typhus group

R. tsutsugamushi chigger mite rodents scrub typhus

Genus Coxiella

C. burnetii usually airborne or contact livestock, small mammals Q fever

Genus Rochalimaea

R. quintana body louse humans trench fever