Health and Fitness (NEW)

Favourite Blood Type? The Bloodsucking Preferences of Mosquitoes

Welcome to the fascinating, albeit slightly unnerving, world of mosquitoes and their blood-sucking preferences. If you’ve ever wondered whether mosquitoes have a favourite blood type or if you’re just unlucky when it comes to being bitten, you’re in the right place. We’re diving deep into the science behind these pesky creatures and their seemingly insatiable thirst for blood.

Mosquitoes and Their Need for Blood

Before we delve into the specifics of mosquitoes’ blood preferences, it’s essential to understand why they need blood in the first place.

The Importance of Blood

Surprisingly, both male and female mosquitoes primarily feed on nectar from plants. It’s the sugar in the nectar that provides them with the energy they need to survive. However, female mosquitoes have an additional requirement: they need the protein and iron found in the blood to produce eggs. Therefore, it is only the female mosquitoes that seek out and feed on the blood of humans and other animals.

Do Mosquitoes Have a Favorite Blood Type?

Now, let’s get to the heart of the matter. Do mosquitoes have a preference for a particular blood type? The answer, interestingly enough, is yes.

The Science Behind the Preference

Researchers have found that mosquitoes, particularly the species Aedes aegypti, are more attracted to certain blood types. This species of mosquito is responsible for transmitting diseases like dengue fever, yellow fever, and Zika virus. Studies have shown that individuals with type O blood are bitten nearly twice as often as those with type A blood. People with type B blood fall somewhere in the middle of this spectrum.

The Role of Secretors and Non-Secretors

Blood type, however, is not the only factor that influences a mosquito’s preference. Whether or not you are a “secretor” plays a significant role as well. A secretor is someone who secretes their blood type antigens in their bodily fluids, such as saliva, sweat, and urine. Approximately 80% of the population are secretors.

Mosquitoes are attracted to the chemicals on our skin, and secretors give off additional cues that mosquitoes can detect. Studies have shown that mosquitoes are more attracted to secretors, regardless of their blood type.

Other Factors That Attract Mosquitoes

While blood type and secretor status are significant factors in mosquito attraction, they are not the only ones. Other elements also play a role in making you more or less attractive to mosquitoes.

  • Carbon Dioxide: Mosquitoes can detect carbon dioxide (CO2) from up to 50 meters away. People who exhale more CO2, such as larger individuals or those who are exercising, are more attractive to mosquitoes.
  • Body Heat: Mosquitoes are attracted to heat, and they can sense the warmth of your body.
  • Skin Bacteria: The types and amount of bacteria on your skin can also influence mosquito attraction. Some bacteria produce chemicals that are attractive to mosquitoes, while others produce chemicals that are repellant.
  • Clothing Color: Mosquitoes are more attracted to dark-coloured clothing.

How to Protect Yourself from Mosquito Bites

While it’s not possible to change your blood type or secretor status, there are steps you can take to minimize your attractiveness to mosquitoes and protect yourself from their bites.

  • Use Insect Repellent: Products containing DEET, picaridin, or oil of lemon eucalyptus are effective at repelling mosquitoes.
  • Wear Light-Colored Clothing: As mentioned earlier, mosquitoes are more attracted to dark-coloured clothing. Wearing light-coloured clothing can help make you less attractive to them.
  • Avoid Dusk and Dawn: Mosquitoes are most active during dusk and dawn. If possible, stay indoors during these times.
  • Use Fans: Mosquitoes are not strong fliers, so using fans can help keep them away.


Yes, mosquitoes do have a favourite blood type, with a preference for type O blood and secretors. However, several other factors also influence mosquito attraction, including carbon dioxide, body heat, skin bacteria, and clothing colour. While you can’t change your blood type or secretor status, you can take steps to protect yourself from mosquito bites, such as using insect repellent, wearing light-coloured clothing, avoiding dusk and dawn, and using fans.

Remember, knowledge is power. Understanding what attracts mosquitoes can help you take proactive measures to protect yourself and your loved ones from these pesky, and potentially dangerous, creatures.

Jack Floyd

This article is written by…

Jack Floyd

Jack has been a professional physiotherapist for many years, and he has recently started his own practice.

Jack has a special interest in sports medicine as he has been practising basketball at a very high level. Many of his clients see him for exactly this reason.

Read more about Jack here…