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La zanzara tigre continua a diffondersi in Svizzera: dopo Ticino, Grigioni, Basilea, Zurigo e più recentemente Sciaffusa, l'insetto è stato segnalato ora anche a Ginevra, indicano oggi le autorità cantonali.
La zanzara tigre è un insetto nero con striature bianche, originario del Sudest asiatico, molto aggressivo, che punge ripetutamente, prevalentemente di giorno, ed è un potenziale portatore di malattie virali tropicali, come la febbre dengue e chikungunya. Alle nostre latitudini, il rischio è però quasi nullo.
L'insetto esotico, che si riproduce grazie ai ristagni di acqua, si è diffuso in molte parti del mondo sfruttando i trasporti internazionali. In Svizzera, le zanzare tigre sono comparse per la prima volta in Ticino nel 2003.
ats/joe.p.
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