Definition of relapsing fever
: 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
First Known Use of relapsing fever
Medical Definition of relapsing fever
: 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 and that is caused by a spirochete of the genus Borrelia transmitted by the bite of a body louse (Pediculus humanus humanus) or a tick of the genus Ornithodoros and found in the circulating blood—see mianeh fever
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