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Crimean-congo haemorrhagic fever

a form of haemorrhagic fever distinct from Omsk haemorrhagic fever, occurring in central Russia, transmitted by species of the tick hyalomma, and caused by crimean-congo haemorrhagic fever virus, a member of the bunyaviridae family; horses are the chief reservoir of human infection; characterised by abrupt onset, high fever, headache, myalgia, widespread petechial haemorrhagic lesions, gastrointestinal bleeding, high fatality rate.

Synonym: african tick fever.