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a bacterial species, the agent of Rocky Mountain spotted fever, South African tick-bite fever, São Paulo exanthematic typhus of Brazil, Tobia fever of Colombia, and spotted fevers of Minas Gerais and Mexico; transmitted by infected ixodid ticks, especially Dermacentor andersoni and D. variabilis.
Rick·ett·si·a rick·ett·si·i(ri-ket'sē-ă ri-ket'sē-ī)
The bacterial agent of Rocky Mountain spotted fever and its geographic variants; transmitted by infected ixodid ticks, especially Dermacentor andersoni and D. variabilis.
Ricketts,Howard T., U.S. pathologist, 1871-1910.
Rickettsia akari - a species causing human rickettsialpox.
Rickettsia australis - a species causing a spotted fever.
Rickettsia conrii - an African species probably causing boutonneuse fever.
Rickettsia prowazekii - a species causing epidemic typhus.
Rickettsia rickettsii - the agent of Rocky Mountain spotted fever.
Rickettsia sibirica - the agent of Siberian or North Asian tick typhus.
Rickettsia tsutsugamushi - a species causing tsutsugamushi disease and scrub typhus.
Rickettsia typhi - a species causing murine or endemic typhus fever.
rickettsial - pertaining to or caused by rickettsiae.
rickettsialpox - an acute disease caused by Rickettsia akari; transmitted by the mite.
rickettsiosis - infection with rickettsiae.
rickettsiostatic - an agent inhibitory to the growth of Rickettsia.
a genus of small, rod-shaped, round to pleomorphic microorganisms in the order Rickettsiales. They are true bacteria, gram-negative, and cultivable only in living tissues. Transmitted by lice and ticks, they cause disease in humans and domestic animals but are also found in the cytoplasm of tissue cells of lice, fleas, ticks and mites, which may act as reservoirs and vectors. See also ehrlichia and coxiella.
causes rickettsial pox in humans, mice and rats.
causes queensland tick typhus in humans, small marsupials, rats.
causes new typhus in humans and rabbits.
see Chlamydophila pecorum.
causes boutonneuse fever in humans and dogs and small feral mammals.
see Ehrlichia ovina.
causes epidemic typhus in humans and possibly cattle, sheep and goats.
causes spotted fever in humans and many feral animals, especially rodents and in dogs and birds. See also rocky mountain spotted fever.
causes Siberian tick typhus in humans and many feral mammals, especially rodents.
causes murine typhus in humans and the brown rat.