Impact of a short-term community-based cleanliness campaign on the sources of dengue vectors: an entomological and human behavior study.

Position:Public health

* Dengue is a mosquito-borne viral disease.

* It is endemic in over 100 countries of Africa, America, Asia, and the Western Pacific.

* The causative agents are four closely related, but antigenically distinct, virus serotypes (DEN-1, DEN-2, DEN-3, and DEN-4) of the genus Flavivirus.

* Their principal vector is the mosquito Aedes aegypti.

* Dengue has two clinical forms:

  1. dengue fever and

  2. dengue hemorrhagic fever.

* The manifestations range from a nonspecific viral syndrome to severe and fatal hemorrhagic disease.

* There is no specific management for dengue infection:

* Vaccines remain commercially unavailable.

* Vector control is considered the only strategy for controlling the disease.

* A long-term community-based control project may not however, be feasible when a sudden onset of epidemics occurs in highly populated urban areas.

* In June 2002, a considerable number of cases of dengue fever/dengue hemorrhage fever were reported in South Taiwan.

* The government conducted a weeklong community-based cleanliness campaign.

* The study reported here evaluated the effectiveness of the campaign.

* The prevalence of dengue vectors was evaluated according to changes in the ovitrap index.

* This index significantly decreased, from 66.7 percent before the campaign to 39.3 percent three months later.

* Human knowledge and behavior were investigated by a...

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