Why Do Some People Get Bitten By Mosquitoes More Than Others?

Why Do Some People Get Bitten By Mosquitoes More Than Others?

Are you one of these people that seems to be the number one target for any mosquitoes in your vicinity? If yes, you probably wonder what makes you such a special attraction.

Understanding what lures these insects to you could be useful in helping you to stay bite-free or at least less attractive.

You may have heard some myths like eating garlic, onions, bananas or vitamin B will repel mosquitoes. Or another which says the opposite, eating bananas will attract mosquitoes. Scientists have researched these and found no concrete evidence that suggests any is true.

There are so many old wives tales about mosquitoes. You have to sort out which ones have any truth and which are a complete fallacy.

What Attracts Mosquitoes To You?

The truth is there are several factors that can affect a person’s attractivity to these pesky insects. There are some you have no control over but a couple you can do something about.

I don’t get many bites but our son seems to attract any mosquitoes in the vicinity. He receives several bites when the person next to him isn’t bitten at all. Why?

According to research, there is a group of about 20% of the population who are “high attractor types”. This is the term applied to this unlucky part of the population by John Day, professor of medical entomology and mosquito expert at the University of Florida in Vero Beach.

Professor Day says there are two main factors that attract mosquitoes – sight and smell.

Although the scientists don’t have any real solution other than using insect repellent they do have some ideas why some of us may seem irresistible. There are some factors you can control but the majority are due to your genetics.

Why Do Mosquitoes Bite?

Only the female mosquitoes bite. They bite to get the extra protein they need to lay eggs.

There are more than 170 species in the US and some may have their own preferences. As you probably won’t recognize the mosquito that’s biting you let’s consider some of the general properties that make you more appealing to these insects.

1. Blood Type

Male and female mosquitoes feed on nectar and this provides sufficient food to live. However, the females need additional protein to produce eggs. They get this extra protein as blood from animals or humans.

The female mosquito has some fondness for certain blood types. As the females rely on the protein in our blood to produce their eggs, it’s normal they have their preferences.

Research shows that the mosquitoes favor O blood group. People with O blood group are likely to be bitten twice as much as someone with type A blood group. Type B group are between the two.

Additionally, 85% of people produce a secretion that signals their blood group. Mosquitoes have a preference for this group regardless of their blood type. I guess they like to know what type of blood they’re getting before taking action!

2. Carbon Dioxide

Female mosquitoes have an organ called the maxillary palp that can detect the CO2 we exhale. They can detect their future meal up to 160 feet away and any carbon dioxide will attract the mosquitoes.

Generally speaking the more carbon dioxide you exhale the more attractive you will be to the female mosquitoes.

Larger people and pregnant women tend to emit greater quantities of CO2. Larger people also provide a bigger target.

Taking exercise and breathing heavily means you will exhale more and thus you have a greater risk of attracting the female mosquitoes.

3. Heat and Sweat

Although mosquitoes might seem like a primitive insect, they use a combination of complicated senses to detect humans and animals. This means there’s more to being detected by a mosquito than simply breathing.

Scientists have determined that certain odors released with perspiration will attract mosquitoes. They are detected by receptors in the mosquito’s maxillary palp.

Some of the compounds found on our skin are:

  • Lactic acid is released through your skin pores especially after exercising
  • Uric acid can also build up on the skin
  •  Octenol is contained in your sweat and breath
  • Ammonia

With more than 350 compounds that affect our skin odor, these are just a few that may have some influence on our attractiveness to mosquitoes.

Mosquitoes also seem to favor higher body temperatures. So, exercising that will cause your body temperature to rise, produce more of the compounds above and produce odors that may attract the mosquitoes.

So while genetic factors will influence the amount of the compounds emitted, exercising could cause you to become more attractive to these insects.

Studies have also shown that some species of mosquitoes are attracted to Limburger cheese. The bacteria in the cheese resembles the bacteria found between our toes. This explains why some species of mosquitoes are attracted to our feet.

Older sweat could make you more of a target. Regular showering might help keep the mosquitoes at distance!

4. Pregnant Women

Unfortunately, pregnant women seem to attract some species of mosquitoes more than women who are not pregnant.

Research carried out in Gambia with malaria-carrying mosquitoes suggest that pregnant women have twice the chance of being bitten. There are several possible reasons:

  • they exhaled 21% more carbon dioxide than non-pregnant women
  • the abdomens of the pregnant women were 1.26°F hotter – mosquitoes like higher body temperatures and that may also produce more odors that attract the insects
  • they left the huts to urinate twice as often as the non-pregnant women

5. Clothing Colors and Movement

Dark or brightly colored clothing will make you more visible to mosquitoes. The first step in the search for a human to bite is through vision.

As they tend to fly close to the ground to avoid any wind, they see your silhouette against the horizon. People dressed in dark or brightly colored clothes will stand out. Wearing light clothes will make you less visible.

Movement is another clue they use to find a target. If your moving about a lot you will be easier to distinguish from the background. Some research tests show that movement can increase biting by 50%.

6. Beer

Are you a beer drinker? If you are this could be one of the reasons mosquitoes home in on you.

Research has shown that mosquitoes bite people more often after they’ve had a beer. Drinking a cold beer may increase your body temperature, cause you to breathe a little harder or increase the ethanol excreted in your sweat. At the moment the reason drinking beer may cause you to be an attraction isn’t really known.

Conclusion – Why Do Some People Attract Mosquitoes

There are many things that may attract mosquitoes to us that are out of our control – our genetics.

But apart from that if you’re a magnet for mosquitoes and are in a mosquito-infested area:

  • don’t move around or do anything that will make you sweat and breathe heavily
  • wear light-colored clothing that covers your legs and arms
  • don’t drink beer

These three things may help you to receive fewer bites.

Do you get bitten by mosquitoes more than others? Have you found any solutions? Let us know in the comments below.

Are you always bitten by mosquitoes when then don't seem to attack others? Have you wondered why? Here are some reasons why you are more attractive than others.

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