Mosquitoes are picky eaters – we studied 3 common South Florida species to learn why they like some people more than others

In a recent study examining the behavior of three common South Florida mosquito species, researchers uncovered that these insects can be selective about their human hosts. The three species studied were Aedes aegypti, Aedes albopictus, and Culex quinquefasciatus, each with distinct preferences for human selection.

Aedes aegypti, a prevalent urban mosquito in warm climates, had a preference for men over women, though this factor was not clearly defined. This species showed attraction to individuals with lower levels of certain odors, such as cyclic alcohols found in some fragrances and cosmetics. However, they were also drawn to those with a higher concentration of Staphylococcus bacteria on their skin. Interestingly, lower attraction was associated with the presence of certain Pseudomonas bacteria.

Aedes albopictus, also known as the Asian tiger mosquito, was less selective compared to Aedes aegypti. They showed a preference for individuals with higher levels of organic compounds called ketones, particularly mesityl oxide, which has a sweet, honey-like aroma. This species also favored skin microbes, preferring those with more of them.

The third species, Culex quinquefasciatus, also known as the southern house mosquito, primarily fed on birds but also bit humans. Unlike the other two species, this one did not show a clear preference based on sex. This mosquito species had its own set of preferences, favoring people with higher levels of certain skin microbes.