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arboviruses

Monday 6 February 2006

Emerging arboviruses may occur in zones where they do not exist. Dengue which originally was located in southeastern Asia, is the most important arbovirusis in the world.

The occurrence of dengue haemorrhagic fever (DHF) in Asia and America, mostly in urban areas, increased the global concern about dengue. Likewise, cases of DHF are not reported in Africa and in the Indian Ocean southwestern islands.

Vectors

- An arbovirus requires a competent haematophagous arthropod for transmission from one vertebrate to another susceptible host.

- Air transportations allow quick transfers from place to place and the diffusion of potential vectors or infectious hosts. The merchandise transportation by containers allowed the diffusion of Ae. albopictus from Asia through Africa and America.

- Aedes albopictus
- Aedes aegypti

Diseases

- Dengue

- yellow fever
- japanese encephalitis
- Rift valley fever
- crimean-Congo haemorrhagic fever
- West Nile encephalitis
- Sindbis
- Wesselsbron
- Chikungunya