![]() The order Bunyavirales includes the families Arenaviridae, Filoviridae, and all members of the former family Bunyaviridae, especially Peribunyaviridae.The "VHF syndrome" (capillary leak, bleeding diathesis, and circulatory compromise leading to shock) appears in a majority of people with filoviral hemorrhagic fevers (e.g., Ebola and Marburg virus), Crimean–Congo hemorrhagic fever (CCHF), and the South American hemorrhagic fevers caused by arenaviruses, but only in a small minority of patients with dengue or Rift Valley fever.įive families of RNA viruses have been recognised as being able to cause hemorrhagic fevers. The severity of symptoms varies with the type of virus. Malaise, muscle pain, headache, vomiting, and diarrhea occur frequently.Flushing of the face and chest, small red or purple spots ( petechiae), bleeding, swelling caused by edema, low blood pressure ( hypotension), and circulatory shock.Signs and symptoms of VHFs include (by definition) fever and bleeding: ![]()
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