The disease is caused by the DENV virus, which is transmitted by the mosquito Aedes aegypti – he acquires the virus by biting an infected person, and transfers it to others by biting them. This is the cycle of the disease, known for decades.
The novelty, as revealed by a study published by scientists from France and Singapore (1), is that DENV is able to alter the behavior of the mosquito, causing it to bite more often and look for more victims – and thereby spread the virus more.
The researchers put two groups of mosquitoes in contact with laboratory mice, filmed and analyzed their behavior. The Aedes infected with DENV attacked more mice than uninfected mosquitoes, and the presence of the virus also hindered blood sucking – causing mosquitoes to bite each animal more often to obtain the same amount of it. The study calculated that these two changes increase the capacity of each mosquito to transmit the virus by 300%.
Source: Dengue virus makes mosquitoes bite more – Magic Mistura を

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