Scientists from the University of Notre Dame report that nighttime lighting increases the frequency of mosquito bites that prefer daytime activity.
During the experiment, one of the scientists allowed mosquitoes of the Aedes aegypti species in cages to bite his hands at different times of the day: during the day, at night, and at night, but under night illumination with artificial light sources. Mosquitoes of this species usually feed during the day. However, it turned out that in the latter case, the females were twice as likely to bite and drink blood at night. Thus, only 29% of mosquitoes from the control group (without light) and 59% of mosquitoes from the experimental group (with night light) fed at night.
Scientists conclude that light pollution can affect the spread of a number of mosquito-borne infections — dengue, chikungunya, Zika, and others. Considering that night lighting is now the norm for most settlements, experts recommend using bed nets even where where night-feeding mosquitoes (genus Anopheles, for example) are rare.
An interesting point: not every representative of the Aedes aegypti species ate at night, even under artificial light. Scientists suggest that the tendency to night feeding is determined by the genes of the insect.