Fever, tick

Also known as Rocky Mountain spotted fever, an acute febrile (feverish) disease initially recognized in the Rocky Mountain states, caused by Rickettsia rickettsii transmitted by hard-shelled (ixodid) ticks. Occurs only in the Western Hemisphere. Anyone frequenting tick-infested areas is at risk for RMSF. The onset of symptoms is abrupt with headache, high fever, chills, muscle pain. and then a rash .The rickettsiae grow within damaged cells lining blood vessels which may become blocked by clots. Blood vessel inflammation (vasculitis) is widespread. Early recognition of RMSF and prompt antibiotic treatment is important in reducing mortality. The first person to describe the disease was an ear, nose and throat specialist, Edward Ernest Maxey. Maxey reported the disease in 1899. Seven years later, a pathologist named Howard Taylor Ricketts showed that it was transmitted by a tick bite. The agent that causes the disease was named for him — Rickettsia rickettsii. Rocky Mountain spotted fever is also called spotted fever and tick typhus.

Medical dictionary. 2011.

Look at other dictionaries:

  • fever tick — noun : a tick that transmits the causative agent of a fever; specifically : a cattle tick of the genus Boophilus that transmits piroplasmosis or anaplasmosis …   Useful english dictionary

  • texas fever tick — noun Usage: usually capitalized T : a cattle tick (Boophilus annulatus) * * * Texas fever tick, the tick that transmits Texas fever; cattle tick …   Useful english dictionary

  • Texas fever tick — n a cattle tick of the genus Boophilus (B. annulatus) …   Medical dictionary

  • spotted fever tick — noun : a tick that transmits the rickettsia of Rocky Mountain spotted fever; especially : a common tick (Dermacentor venustus) of western No. America …   Useful english dictionary

  • Tick-borne encephalitis — Tick borne meningoencephalitis Classification and external resources ICD 10 A84 ICD 9 063 …   Wikipedia

  • Tick fever — Also known as Rocky Mountain spotted fever, an acute febrile (feverish) disease initially recognized in the Rocky Mountain states, caused by Rickettsia rickettsii transmitted by hard shelled (ixodid) ticks. Occurs only in the Western Hemisphere.… …   Medical dictionary

  • Tick typhus — Also known as Rocky Mountain spotted fever, an acute febrile (feverish) disease initially recognized in the Rocky Mountain states, caused by Rickettsia rickettsii transmitted by hard shelled (ixodid) ticks. Occurs only in the Western Hemisphere.… …   Medical dictionary

  • Fever, Rocky Mountain spotted (RMSF) — An acute febrile (feverish) disease initially recognized in the Rocky Mountain states, caused by Rickettsia rickettsii transmitted by hard shelled (ixodid) ticks. Occurs only in the Western Hemisphere. Anyone frequenting tick infested areas is at …   Medical dictionary

  • Tick-Fever — Tick|fe|ver, (auch:) Tick Fe|ver [ tɪkfi:və], das; [engl. tick fever, aus: tick = Zecke u. fever = Fieber] (Med.): bes. in den USA auftretende, durch Zecken übertragene Infektionskrankheit …   Universal-Lexikon

  • tick-borne fever — n a usu. mild rickettsial disease of ruminant animals (as sheep and cattle) esp. in Europe that is caused by a bacterium of the genus Ehrlichia (E. phagocytophilia syn. Rickettsia phagocytophilia) which is transmitted by a tick of the genus… …   Medical dictionary

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