Have you
ever wondered which animal is responsible for killing the most people? Perhaps
a shark? Maybe some type of snake or spider? Or maybe some sort of large land
mammal like a grizzly bear or a lion?
If you
were thinking along those lines, then I'm sorry to disappoint, but the
deadliest animal known today is quite a bit smaller than all of those. Believe
it or not, found almost everywhere, on every continent except Antarctica, our
deadliest animal is the mosquito!
How is
this possible?
Mosquitos
are notorious for transmitting diseases. They carry with them diseases like
malaria, dengue fever, yellow fever, encephalitis, West Nile virus, and
countless others. Acting as vessels for diseases, mosquitoes transmit these
diseases to either us, or animals. These diseases can then make us very ill and
sometimes even lead to death. It is not actually one type of mosquito that is
transmitting all of these diseases, but in fact, it's several. The most common
belong to the genera Aedes (Dengue and Yellow Fever), Anopholes (Malaria and
Canine heartworm), and Culex (West Nile, Encephalitus and Avian Malaria).
At more
than 1 million fatalities each year, the mosquito is most certainly the
deadliest of all animals.
Why They
Bite
Mosquitoes
need the protein in our blood, or the blood of other animals, in order to lay
their eggs. This means that only the female mosquitoes need blood. In other
words, next time you find yourself scratching away at one or more of those
incredibly itchy and annoying mosquito bites, you can thank female mosquitoes
for that. The male mosquitoes are content living off plant nectar.
The way a
female mosquito bites us is by sticking her thin, sharp proboscis into our
flesh. As she draws blood she inserts some of her saliva along with
anticoagulants to keep the blood from clotting. This is where the danger lies
and gives mosquitoes the rightful title of being the most deadly. In the
mosquito saliva there could be viruses and parasites lurking, ready to infect
us. These diseases can be deadly, but are not normally transmissible between
humans. However, mosquitoes are doing an excellent job acting as vectors for
transmission of these diseases.
But how
exactly do the mosquitoes find us?
Mosquitoes
have several different ways to sense living things so that they can then bite
and extract blood. The first of those is chemical sensing. Mosquitoes can
actually detect CO2 in the air from about 100 feet away. As we and other
animals around us exhale, mosquitos are alerted of our presence.
Mosquitoes
can actually detect CO2 in the air from about 100 feet away.
So maybe
we can just hold our breath next time we see a mosquito? Well, it's not quite
that easy. Mosquitoes can also detect heat and have visual sensors that can
detect color contrast and movement.
It might be a little harder to trick that mosquito!
It might be a little harder to trick that mosquito!
Although
attempting to hide completely from mosquitoes might not work, there are plenty
of things we can do to make our live a little easier and safer, such as:
- Wear
long sleeves & pants.
- Put on
mosquito repellents that contain DEET.
- Avoid
being outside during dawn, dusk, or late evening.
-
Eliminate stagnant water. It attracts mosquitoes & gives them a good place
to lay their eggs.
- If you
have a pond, consider stocking it with Gambusia, which feed off mosquito
larvae.
As
irritating as these insects can be, they have been around for a whole lot longer
than us – about 30 million years. So, it seems inevitable that we must learn to
exist with them, but it doesn't hurt for us to have some kind of upper hand to
protect ourselves.
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