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  • Title: [Viral hemorrhagic fevers: what is the risk for travelers?].
    Author: Le Guenno B.
    Journal: Med Trop (Mars); 1997; 57(4 Bis):511-3. PubMed ID: 9612763.
    Abstract:
    The term hemorrhagic fever covers a number of diseases with different clinical and epidemiologic features. All these diseases are zoonoses but their occurrence is not confined to tropical areas. Some occur in polar zones. Travelers to endemic areas for these diseases are at risk of infection. There are two modes of transmission. Arthropods are vectors for some diseases such as yellow fever, dengue fever, and Rift Valley fever which are carried by mosquitos and Congo-Crimea virus which is carried by ticks. Airborne contamination by rodent excrement is responsible for transmission of hantaviruses and arenaviruses. Nosocomial infection is a risk for health care providers. Some types of hemorrhagic fever such as Bolivian hemorrhagic fever are highly localized, while other types such as dengue are observed worldwide. Judging from the small number of cases observed in European countries, the overall risk for travelers seems low except unless high-risk activities are planned. The main exceptions are yellow fever and dengue which can easily be transmitted to tourists by mosquitos. Yellow fever can be prevented by vaccination. Typical dengue is usually self-limited but hemorrhagic forms require treatment to prevent shock.
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