sentences:  "Rickettsia" species are transmitted by numerous types of arthropod, including chigger, ticks, fleas, and lice, and are associated with both human and plant diseases.Most notably, "Rickettsia" species are the pathogens responsible for typhus, rickettsialpox, boutonneuse fever, African tick-bite fever, Rocky Mountain spotted fever, Flinders Island spotted fever, and Queensland tick typhus (Australian tick typhus).The majority of "Rickettsia" bacteria are susceptible to antibiotics of the tetracycline group.