Rickettsia

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Rickettsia
Scientific classification
Kingdom:Bacteria
Phylum:Proteobacteria
Class:Alpha Proteobacteria
Order:Rickettsiales
Family:Rickettsiaceae
Genus:Rickettsia
Species

Rickettsia felis
Rickettsia prowazekii
Rickettsia rickettsii
Rickettsia typhi

Bacteria of the genus Rickettsia are carried as parasites by many ticks, fleas, and lice, and cause diseases such as typhus, rickettsialpox, Brill-Zinsser disease, Boutonneuse fever, Rocky Mountain spotted fever, and endemic typhus in human beings. Like viruses, they grow only in living tissue. Diseases caused by some other bacteria, such as Coxiella burnetii, the cause of Q fever, are also considered rickettsial diseases, though the organisms are no longer considered particularly close relatives.

The genus Rickettsia is named after Howard Taylor Ricketts (18711910). Despite the similar name, Rickettsia bacteria do not cause rickets. The disease of rickets takes its name from the Greek word for spine, rhakhis, and is a vitamin deficiency disease, not an infectious disease.Template:Med-stub

de:Rickettsien fr:Rickettsia zh:立克次氏体

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