Also found in: Dictionary, Thesaurus, Medical, Wikipedia.
Related to rickettsialpox: Q fever
, any of an order (Rickettsiales) of very small microorganisms, many disease-causing, that live in vertebrates and are transmitted by bloodsucking parasitic arthropods such as fleas, lice (see louse), and ticks.
..... Click the link for more information. .
An acute febrile disease caused by the organism Rickettsia akari and transmitted from the mouse to humans by the mite Allodermanyssus sanguineus; characterized by rash, a primary ulcer, and often swelling of glands.