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Pernilongo comum não transmite vírus Zika, conclui Fiocruz

Cientistas do Instituto Oswaldo Cruz (IOC) concluíram que o pernilongo, mosquito de hábitos doméstico e noturno, de nome científico Culex quinquefasciatus, não transmite o vírus zika.

pesquisa foi divulgada ao público nesta terça-feira (6), em conjunto com a revista científica PLoS (Public Library of Science) Neglected Tropical Diseases, e tem parceria do Instituto Pasteur de Paris.

Os trabalhos foram coordenados pelo médico veterinário Ricardo Lourenço, do IOC, e envolveram um total de 42 pesquisadores. Em uma primeira fase, no ano passado, eles coletaram cerca de 1.600 mosquitos, cerca da metade deles Culex e o restante Aedes aegypti, em quatro bairros da cidade do Rio: Copacabana, Manguinhos, Triagem e Jacarepaguá. Uma pequena parte, só 26 indivíduos, era de Aedes albopictus.

Os mosquitos foram testados e nenhum dos Culex era portador do vírus zika. Em uma segunda fase, foi criada uma colônia de mosquitos no IOC e eles foram expostos, alimentados e contaminados com sangue contendo o vírus zika.

Os insetos foram minuciosamente examinados para detectar se havia vírus vivo neles, incluindo o estômago, a cabeça e a saliva, mas mesmo assim não foi identificado o causador da zika nos pernilongos.

“Nós examinamos a saliva do mosquito, para ver se o vírus ativo infectante estava ali. Nós não encontramos nenhuma vez o vírus. Isto nos convenceu de que esse mosquito não era capaz de transmitir a zika. Já os Aedes aegypti se infectavam de 80% a 100% das vezes, com uma quantidade de saliva com muitos vírus”, disse Ricardo Lourenço.

O cientista afirmou que o trabalho, que descarta a transmissão do zika pelo pernilongo comum, representa um direcionamento importante para as políticas públicas de combate à doença, pois evitará desperdício de recursos financeiros e esforços de saúde no combate a esse inseto em particular.

Outras informações podem ser obtidas na página do IOC na internet.

Fonte: Exane

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