单词	relapsing fever
释义	relapsing fever noun : a variable acute epidemic disease that is marked by recurring high fever usually lasting three to seven days and is caused by a spirochete (genus Borrelia) transmitted by the bites of lice and ticks Word History First Known Use 1828, in the meaning defined above Medical Definition relapsing fever noun : a variable acute infectious disease that is marked by sudden recurring episodes of high fever which usually last from three to seven days, are typically accompanied by myalgia, arthralgia, headache, nausea, and chills, and often end in a crisis stage marked by a spike in fever followed by an afebrile period and that is caused by a spirochete of the genus Borrelia (as B. hermsii, B. parkerii, or B. recurrentis) that circulates in the blood and is transmitted by the bite of a body louse (Pediculus humanus humanus) or a tick of the genus Ornithodoros see mianeh fever
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