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Definition of Relapsing fever
1. Noun. Marked by recurring high fever and transmitted by the bite of infected lice or ticks; characterized by episodes of high fever and chills and headache and muscle pain and nausea that recur every week or ten days for several months.
Medical Definition of Relapsing fever
1. An acute infection characterised by recurrent episodes of pyrexia alternating with asymptomatic intervals of apparent recovery. This condition has worldwide distribution and is caused by spirochetes of the genus borrelia. (12 Dec 1998)