After two African villages started using mosquito nets to fight malaria, the local mosquitoes seemed to change their habits to skirt the barriers, a French study claimed.
Insecticide-treated bed nets are considered a central weapon in the global fight against malaria, which is transmitted by parasite-carrying mosquitoes and kills more than 650,000 people a year, according to the World Health Organization.
In the study, French researchers zeroed in on mosquito behavior before and after households were given insecticide-treated nets.
They found that mosquitoes seemed to change their hours of ‘peak aggression’ from 2 am or 3 am to around 5 am three years after nets were put up. The finding is ‘worrying’ since villagers usually wake up before dawn to work in crops, and as such are not protected.