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  • Dental ridge

    The raised junction between two planes meeting on the surface of a tooth.  

  • Carotid ridge

    The sharp ridge between the carotid canal and the jugular fossa.  

  • Rickettsiostatic

    Preventing or slowing the growth of rickettsiae.  

  • Rickettsial disease

    A disease caused by an organism of the family Rickettsiaceae. The most common types are the spotted-fever group (Rocky Mountain spotted fever and rick¬ettsialpox), epidemic typhus, endemic typhus, Brill’s disease, Q fever, scrub typhus, and trench fever.  

  • Rickettsia rickettsii

    The causative agent of Rocky Mountain spotted fever. The animal reservoirs are rodents and dogs and the vectors are ticks of several genera.  

  • Rickettsia prowazekii

    The causative agent of epidemic typhus, spread by the human body louse. Unlike most other Rickettsia, humans are the primary reservoir for R. prowazekii, which was once thought to be a strictly human pathogen. Flying squirrels may be animal reservoirs, and humans acquire infection from their lice or fleas.  

  • Rickettsia honei

    The causative agent of a spotted fever that clinically resembles Rocky Mountain spotted fever. It is found only in Australia and neighboring islands.  

  • Rickettsia conorii

    The causative agent of boutonneuse fever found in the Mediterranean, parts of Africa, and India. The animal reservoirs are rodents and dogs and the vectors are ticks of several genera.  

  • Rickettsia akari

    The causative agent of rickettsialpox. The animal reservoir is the house mouse and the vector is a mite.  

  • Rickettsia africae

    The causative agent of African tick bite fever, usually found only in sub-Saharan Africa.  

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