DE QUEM OS MOSQUITOS GOSTAM MAIS?
Autor: SEBASTIÃO LUIZ RM | Publicado: 2015-05-19T19:48:00-07:00




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Num momento
em que os mosquitos, especialmente da dengue, espalham o medo por todo país,
com alguns estados considerando a condição de epidemia, noticia de
pesquisadores ingleses traz nova informação sobre a atuação desses agentes. 

De acordo
com pesquisadores britânicos, a atração depende dos genes de uma pessoa. Eles
provavelmente têm um impacto sobre o odor do corpo, escreveram os pesquisadores
na revista “PLOS One”. 

Pesquisas
anteriores já determinaram que o odor do corpo influencia. Agora, os cientistas
da London School of Hygiene and Tropical Medicine decodificaram o mecanismo
subjacente.

Os
pesquisadores liberaram mosquitos tigre para voar em um tubo, cuja extremidade
se dividia em dois compartimentos. Cada participante do estudo – 18 gêmeos
idênticos e 19 gêmeos não idênticos – colocou a mão no final de cada
compartimento. Os estudos revelaram que os gêmeos idênticos foram igualmente
atrativos aos insetos. Porém, a atração de gêmeos não idênticos, cujos genes
diferiam significativamente mais, variou fortemente.

Isso prova
que os genes de fato influenciam a probabilidade de ser picado por um mosquito,
disseram os médicos sob a liderança de James Logan. Descobriu-se que o nível de
herdabilidade é comparável ao associado com inteligência e altura. Em
experimentos futuros, os pesquisadores querem identificar os genes
determinantes e os mecanismos de controle subjacentes. 

“Se
compreendermos a base genética da variação entre indivíduos, seria possível
desenvolver maneiras específicas de controle de mosquitos e maneiras novas de
repeli-los”, explicou Logan. Isso também pode, no futuro, promover melhor
proteção contra doenças transmitidas por mosquitos.

Referencias:

Univadis/medical.

PLOS
One
(pdf)

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