Chapter 99: Rickettsial Diseases

Chapter 99: Rickettsial Diseases is a topic covered in the Harrison's Manual of Medicine.

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Rickettsiae are obligate intracellular gram-negative coccobacilli and short bacilli usually transmitted by tick, mite, flea, or louse vectors. Except in the case of louse-borne typhus, humans are incidental hosts.

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