Aedes albopictus

The mosquito-tiger Aedes (Stegomyia) albopictus is a Culicidae originating in Southeast Asia and Indian Ocean. For a few decades, it has been in strong expansion throughout the world, even in not-tropical zone. The transport or the storage of old tires in which water always stagnates (from the shape of the tire) is used him as principal vehicle. It is thought that it is in this manner that he arrived to Houston at the the United States from where he conquered a major part of the American continent. In Europe, it is very present on most of the Italy since the beginning of the years 1990 when it was discovered for the first time at Genoa in a deposit of old imported tires. It is particularly abundant in Romagna especially in the provincial towns of Ravenne. One also punctually finds it in other countries of Mediterranean Europe and it was reference mark sometimes in Suisse and Belgium. In France, after some attempts at installation on storage sections of old tires, from where it had been éradiqué, it succeeded since 2004 to be established durably on the coast of the the Alpes-Maritimes and in 2006 in Haute-Corse, mainly in the area of Bastia. In November 2007, it was located for the first time at the north of the Alps, in the Swiss canton of Argovie.

In tropical zone, it can inoculate about thirty virus, propagating the Chikungunya, the Virus of the Western Nile, the Encéphalite of Saint Louis and sometimes the Dengue. In Europe, in the absence of transmissible pathogenic virus, there had remained inoffensive until 2007. In July 2007 and for the first time, he was recognized as responsible for the transmission of the Chikungunya in Italy (several tens of case in the province of Ravenne).

It is an aggressive species which pricks of day like night, with a small predilection for the paddle and the twilight. It is very resistant to insecticides. It is the female, once fertilized which pricks the Mammifère S or the Oiseau X to absorb blood in which it will find the Protéine S necessary to its Progéniture. It is not directly the blood drunk on the preceding victim which infects the following one, but anesthetic saliva that the mosquito-tiger injects not to be located by its victim. To pass from one human to the other, the viruses must forward several days in the body of the mosquito where they must avoid being digested by the stomach, and to reproduce. Certain viruses not being able to survive in the body of the mosquito, the Aedes cannot fortunately transmit all the types of germ.

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