Mosquitoes — Trillions of Tiny Obesity Villains?

This post could probably be filed under “Flaky Fringe” — our category for what might be called speculative science — ideas that are not and may never be fully proven. Still, the obesity epidemic is so big and mysterious and scary, with so many consequences and ramifications, it might be worth giving even the sketchiest theory at least a moment of consideration. In tune with the summer theme, let’s talk about those little varmints known as mosquitoes, and the hypothesis that they contribute indirectly to the unhealthful heaviness of kids.

The Asian tiger mosquito, described as “a particularly vicious species,” came to America in 1985. Apparently, these annoying insects arrived (via used tire shipments from Japan) in Houston, TX, and liked their new home enough to spread to half the contiguous states.

The distinctive trait of this mosquito species is its lack of pickiness about how large a body of water it deposits its eggs in. All it needs is a bottle-cap full of rainwater, or a tiny puddle in a flowerpot. But that is not its only unpleasant personality trait. While other types of mosquitoes mainly come out at dawn and dusk, these monsters pursue their aggressive agenda all day long.

Originally, a childhood obesity connection was not even on the researchers’ radar. The five-year research project began from fear that the Asian tiger mosquito will adopt here the role it plays in other parts of the world, as a disease vector; a creator of deadly epidemics like malaria and zika.

Rutgers University scientists identified very similar neighborhoods in two different New Jersey towns, employed mosquito abatement techniques in one but not the other, and compared the results. Two years later, for the sake of fairness, the experiment was repeated in the same towns, but reversed.

It was found that adults plagued by mosquitoes tend to cut down their outdoors time by nearly three hours per week. But look what they say about the kids:

This parental-report data is even more striking for their children, aged eight to 12 years old, as time spent in outdoor play was estimated to be 63% less than it would have been if mosquitoes were not a persistent annoyance.

As mosquito targets, active people seem to be unjustly penalized, because mosquitoes are attracted by the carbon dioxide emitted during vigorous exercise. Also, the smell of dirty sweaty feet is like perfume to them. The good news to come out of this study is that mosquito abatement is a teachable skill that homeowners seem willing to learn and utilize.

Of course the community still plays a large role, with education and pesticides, but there is proof the effort actually produces a result, by providing children with more time to go outside and be active.

Your responses and feedback are welcome!

Source: “New Rutgers Study Explores Mosquito Prevalence on Outdoor Physical Activity and Links to Childhood Obesity,”, 06/24/13
Photo credit: John Tann via Visualhunt/CC BY

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About Dr. Robert A. Pretlow

Dr. Robert A. Pretlow is a pediatrician and childhood obesity specialist. He has been researching and spreading awareness on the childhood obesity epidemic in the US for more than a decade.
You can contact Dr. Pretlow at:


Dr. Pretlow’s invited presentation at the American Society of Animal Science 2020 Conference
What’s Causing Obesity in Companion Animals and What Can We Do About It

Dr. Pretlow’s invited presentation at the World Obesity Federation 2019 Conference:
Food/Eating Addiction and the Displacement Mechanism

Dr. Pretlow’s Multi-Center Clinical Trial Kick-off Speech 2018:
Obesity: Tackling the Root Cause

Dr. Pretlow’s 2017 Workshop on
Treatment of Obesity Using the Addiction Model

Dr. Pretlow’s invited presentation for
TEC and UNC 2016

Dr. Pretlow’s invited presentation at the 2015 Obesity Summit in London, UK.

Dr. Pretlow’s invited keynote at the 2014 European Childhood Obesity Group Congress in Salzburg, Austria.

Dr. Pretlow’s presentation at the 2013 European Congress on Obesity in Liverpool, UK.

Dr. Pretlow’s presentation at the 2011 International Conference on Childhood Obesity in Lisbon, Portugal.

Dr. Pretlow’s presentation at the 2010 Uniting Against Childhood Obesity Conference in Houston, TX.

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