Abstract
Viral hemorrhagic fevers (VHFs) represent a group of similar clinical entities contagious constitutional diseases, caused by four different types of RNA viruses: Flaviviridae, Bunyaviridae, Arenaviridae i Filoviridae. These diseases proceed with high fever and damage of the circulatory system leading to homeostasis disorders, commonly accompanied by symptoms of hemorrhagic diathesis. VHFs are typically transmitted through infection vectors (mosquito) or through direct physical contact with infectious material. West Nile fever is the disease which is caused by West Nile virus from the Flaviviridae family. It begins flu-like symptoms, then it appears maculopapular rash and lymphadenopathy. At the most cases the symptoms retreat idiopathically. This disease can proceed as West Nile Neurological Disease in 1% of infected. The article presents three diseases, which can be present in tropical climate such as: Ebola hemorrhagic fever, dengue hemorrhagic fever, West Nile fever.
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