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Typhus is caused by one of two types of bacteria: Rickettsia typhi and Rickettsia prowazekii. The type of typus depends on which bacteria causes the infection. Rickettsia typhi causes murine or endemic typhus. Endemic typhus is uncommon in the Uni...
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Several different illnesses called "typhus" exist, all of them caused by one of the bacteria in the family Rickettsiae. Each illness occurs when the bacteria is passed to a human through contact with an infected insect.
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The term " Rickettsial diseases " is loosely applied to a variety of infectious diseases caused by gramnegative fastidious bacteria belonging to the genera Rickettsia, Orientia, Ehrlichia, and Coxiella . This grouping is justified by historical aspects of the discovery of each microorganism, by similarities in their microbiological and ecological characteristics, and by their association with arthropod vectors (lice, fleas, ticks, and mites).
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