lunes, 21 de marzo de 2016

La ECDC, el Ae Albopictus y el ZIKV en Europa



En el ECDC en Rapid risk assessment: Zika virus disease epidemic: potential association with microcephaly and Guillain–Barré syndrome, fourth update en la página 8 dice:

 Risk of importation and transmission in the continental EU

(........)

The risk of transmission of Zika virus infection in the EU is variable and depends on several co-factors, for example:

  The presence of a potential mosquito vector: Aedes albopictus is established in most places around the Mediterranean coast [66].

  The competence of Aedes albopictus to transmit Zika virus, which depends on characteristics of the pathogen (strain-specific vector competence) and of the mosquito species. Onward transmission from imported cases within the continental EU is possible because Aedes albopictus might be considered a competent vector for the transmission of Zika virus, although a recent study showed an unexpected low vector competence of this species [18]. The vector competence of this species has not yet been confirmed for European mosquito populations; experiments with European Aedes albopictus populations are ongoing [67,68].

 The capacity of the vector to transmit the infection is determined by a number of factors such as vector competence, the mosquito population density, feeding host preferences, biting rates and survival of the mosquito population. Spatial variation in vector capacity is expected in areas where Aedes albopictus is present, and further depends on environmental conditions and locations. In practice, the presence of a competent vector in a location is necessary, but is not sufficient to allow further transmission when an arbovirus is introduced in a mosquito’s population.

The risk of transmission of Zika virus infection is extremely low in the EU during the winter season as the climatic conditions are not suitable for the activity of the Aedes albopictus mosquito. During the summer season, autochthonous transmission in the EU following the introduction of the virus by a viraemic traveller is possible in areas where Aedes albopictus is established [66]. For the months March to May, the International Research Institute for Climate and Society predicts above-normal temperatures in Europe coinciding with a normal precipitation pattern, which might result in an early start of the mosquito activity season in southern Europe [69].

Sobre el Ae Albopictus en la ECDC existen unos mapas ( Mosquito maps ) interesantes


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