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France Reports Tiger Mosquito's / AEDES ALBOPICTUS

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  • France Reports Tiger Mosquito's / AEDES ALBOPICTUS

    AEDES ALBOPICTUS - FRANCE: FIRST REPORT
    ***************************************
    A ProMED-mail post
    <http://www.promedmail.org>
    ProMED-mail is a program of the
    International Society for Infectious Diseases
    <http://www.isid.org>

    Date: Mon 14 Sept 2009
    Source: Le Progres [in French, trans. Mod.TY, edited]
    <http://www.leprogres.fr/fr/region/le-rhone/rhone/article/1973395,184/Le-moustique-vecteur-de-la-chikungunya-decouvert-a-Manissieux.html>


    The tiger mosquito, or [_Aedes_] _albopictus_, is the insect vector of
    dengue and chikungunya [viruses], diseases prevalent in warmer
    countries. One recalls the chikungunya epidemic that struck La Reunion
    [island] during 2005, with over 5000 reported cases.

    This disease is characterized especially by high fever and arthralgia
    [joint pain].

    If this species is established permanently in the South of France, no
    [chikungunya or dengue] illnesses have [yet] been reported in France.
    This does not prevent the DGS (Directorate of Health) from monitoring
    the progression of this insect wherever it advances along its road
    routes.

    "We discovered the 1st specimens in late July [2009] during one of the
    identifications that we made from our routine oviposition traps
    ," says
    Delphine Rey, a biologist at the Interdepartmental Alliance for
    Mosquito Control. Based in Chindrieux (Savoy), it aims to fight
    against the proliferation of mosquitoes. This unit is responsible for
    identifying [mosquito] breeding sites and then put in place methods to
    control the species. The team has installed hundreds of traps in the 5
    departments where it occurs (Ain, Savoie, Haute-Savoie, Isere, and
    Rhone).

    [Breeding sites] are those containing stagnant water where mosquitoes
    lay their eggs. Until now, only traps in Aiton, Savoy, and Manissieux
    in eastern Lyon, the Lyon-Chambery motorway, have revealed the
    presence of the famous "tiger" [mosquito]
    .

    The traps are installed along the roads by which the insect spreads.
    "It comes mainly from Italy, where it has been rapidly expanding in
    recent years. The larvae [and eggs] are most often carried by water in
    truck and car tires. They can then hatch during warm weather. Hence
    the surveillance by specialists, who conduct regular inspections and
    treatments to prevent spread.

    Delphine Rey gives this advice for prevention: "Do not leave any
    standing water near homes. The containers such as flower pots [and
    vases] attract many mosquitoes.

    [This report indicates that _Aedes albopictus_ is spreading northward
    into Europe, with attendant risk of transmission of dengue and
    chikungunya, and possibly other viruses, as occurred with chikungunya
    virus in central Italy in 2007 (see ProMED archive). This virus was
    introduced into France earlier in 2009 by a traveler from Singapore,
    but without ongoing transmission (see ProMED-mail archive no.
    20090423.1524).

    Professor EA Gould provided an interesting commentary emphasizing the
    importance of adaptation of chikungunya virus to _Aedes albopictus_,
    with the risk of wide geographic spread to areas where this mosquito
    has become established (see ProMED-mail archive no. 20080910.2829). In
    that comment, Professor Gould points out the importance of _Ae.
    albopictus_ as a vector of other important viruses such as dengue.
    France has been classified as having a relatively high risk of _Ae.
    albopictus_ establishment (see reference below).

    Reference
    ---------
    European Centre for Disease Prevention and Control, 2009, Technical
    Report: Development of _Aedes albopictus_ risk maps. 45 pp.
    <http://ecdc.europa.eu/en/publications/Publications/0905_TER_Development_of_Aedes_Albopictus_Risk_Maps .pdf>

    A map showing the French administrative divisions can be accessed at
    <http://www.lib.utexas.edu/maps/europe/france_admin91.jpg>.
    A HealthMap/ProMED-mail interactive map of France can be accessed at
    <http://healthmap.org/r/00O->. - Mod.TY]



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