The buzz aboutMosquito Bite Frequency & Genetics

If you’ve always suspected that mosquitoes prefer you to your friends, you’re probably right. It turns out mosquitoes do have preferences, and genetics may be partly to blame.

How it works

Mosquitoes are drawn to breath and the body odor we emit from our sweat glands. It might make your skin crawl, but 23andMe researchers believe that mosquito bite frequency, as well as sensitivity to bites, is partly heritable.

The genetic link

23andMe researchers have identified 285 genetic markers associated with mosquito bite frequency, bite itchiness, or bite size. These markers along with non-genetic factors such as age and sex may affect whether you get more or fewer bites than the people around you.

mosquito on skin

Did you know?

Data from 23andMe customers who consented to participate in research indicate that more than a third, 37.5%, report being bitten more often than others. A little more than a quarter, 27.5%, said they were bitten less frequently than others.

Explore more

Do mosquitoes swarm toward your scent? 23andMe’s Health + Ancestry Service can tell you whether you’re likely to get more or fewer bites than the people around you through our Mosquito Bite Frequency report.

Health + Ancestry Service Kit

Health + Ancestry Service

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23andMe Blog (2017, June 9). “Why Do Mosquitoes Pester Some People More Than Others? It’s in the Genes.” Retrieved October 19, 2018, from

23andMe Blog (2018, July 30). “Itching to See 23andMe’s New Trait Reports.” Retrieved November 7, 2018, from

Centers for Disease Control and Prevention. “Prevent Mosquito Bites.” Retrieved June 21, 2018, from

Furlotte NA et al. (2015). “23andMe White Paper 23-12: Estimating complex phenotype prevalence using predictive models.” 23andMe White Paper 23-12.

Hallem EA et al. (2004). “Olfaction: mosquito receptor for human-sweat odorant.” Nature. 427(6971):212-3.

Jones AV et al. (2017). “GWAS of self-reported mosquito bite size, itch intensity and attractiveness to mosquitoes implicates immune-related predisposition loci.” Hum Mol Genet. 26(7):1391-1406.

McBride CS. (2016). “Genes and Odors Underlying the Recent Evolution of Mosquito Preference for Humans.” Curr Biol. 26(1):R41-6.

Rey JR et al. (2012). “North American wetlands and mosquito control.” Int J Environ Res Public Health. 9(12):4537-605.

Smallegange RC et al. (2011). “Sweaty skin: an invitation to bite?” Trends Parasitol. 27(4):143-8.

Verhulst NO et al. (2011). “Composition of human skin microbiota affects attractiveness to malaria mosquitoes.” PLoS One. 6(12):e28991.

World Health Organization (2018, February 27). “Information for travellers.” Retrieved June 21, 2018, from