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Perspectives

Rickettsial Pathogens and Their Arthropod Vectors

Abdu F. Azad* and Charles B. Beard†
*University of Maryland School of Medicine, Baltimore, Maryland, USA; and †Centers for Disease Control and Prevention, Atlanta, Georgia, USA

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Figure. Composite diagram of the life cycle of Rocky Mountain spotted fever, rickettsialpox, and murine typhus. A. Life cycle of Rickettsia rickettsii in its tick and mammalian hosts (7); B. Rickettsia akari life cycle; and C. Rickettsia typhi life cycle.


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