Most Dangerous Animals In The World

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Most Dangerous Animals In The World
Not all animals are cute and cuddly, some of them can be outright deadly. But if you think that sharks
and crocs are dangerous, wait until you meet these animals on our list. Today we will be talking about
the most dangerous animals in the world. Number one is a certified killer. Stay tuned to find out what it
is.

Number 5. Assassin Bugs
Assassin bugs are little things but, boy, are they nasty. At least, they are if you happen to be an insect
they consider to be prey – or, indeed, a rat or bird seeking to convert one into lunch.
The name of the bugs – which covers about 300 species clustered into the family Reduviidae – already
implies that they are not to be trifled with. The way an assassin bug feeds is the stuff of B-grade science
fiction. Using its trademark strong proboscis – otherwise known as a rostrum – the bug impales its prey
and then injects venom-laced saliva. This serves two gruesome purposes: first, it paralyses the victim,
and then it liquefies its internal organs, allowing the assassin bug to suck it all out. A 1978 study of a US
assassin species observed that the strategy was so successful the bug was able to ingest as much as 99%
of the live weight of its victim. But this is not the reason why these tiny assassins are dangerous to
humans.
The assassin bug transmits a dangerous parasite through its feces. The parasite, which causes a
condition known as Chagas disease. Chagas disease presents itself in 2 phases. The initial acute phase
lasts for about 2 months after infection. During the acute phase, a high number of parasites circulate in
the blood but in most cases, symptoms are absent or mild and unspecific. They may, however, suffer
from fever, headache, enlarged lymph glands, pallor, muscle pain, difficulty in breathing, swelling, and
abdominal or chest pain.
During the chronic phase, the parasites are hidden mainly in the heart and digestive muscles. Up to 30%
of patients suffer from cardiac disorders. In later years the infection can lead to sudden death due to
cardiac arrhythmias or progressive heart failure caused by the destruction of the heart muscle and its
nervous system.
If not treated immediately, Chagas Disease can be a lifelong affliction and unfortunately, there is still no
vaccine for the disease. The best way to prevent this deadly disease is to control the population of the
assassin bugs that carry them. Fortunately, these insects aren’t that plentiful in modern, urban areas in
developed countries. But despite that, the deadly Chagas disease still claims up to 10,000 lives every
year.

Number 4. Tsetse Flies
A bite from a tsetse fly is an extremely unpleasant experience. It is not like a mosquito, which can furrow
its thin mouthpart directly into your blood, often without you noticing. In contrast, the tsetse fly's
mouth has tiny serrations on it that saw into your skin on its way to suck out your blood.

To make matters worse, several species of tsetse fly can transmit diseases. One of the most dangerous is
a parasite that causes "sleeping sickness", or "human African trypanosomiasis" to give it its official
name. Without treatment, an infection is usually fatal.
There are two closely-related single-celled parasites that cause this deathly sleep: Trypanosoma brucei
rhodesiense and T. b. gambiense. The latter is far more prevalent: it is responsible for up to 95% of
cases, mostly in western Africa. It takes several years to kill a person, while T. b. rhodesiense can cause
death within months.
After the initial bite, sleeping sickness symptoms often start with a fever, headaches and aching
muscles. As the illness goes on, those infected become increasingly tired, which is where it gets its
name. Personality changes, severe confusion and poor coordination can also happen.
Nowadays, sleeping sickness is no longer as deadly as it once was. In the early 20th Century several
hundred thousand people were infected each year. By the 1960s the disease was considered "under
control" and had reached very low numbers, making its spread more difficult. But in the 1970s there was
another major epidemic, which took 20 years to control.
The reason sleeping sickness is so deadly is that it can enter the brain. There it causes its most severe
symptoms, such as confusion, hallucinations and poor coordination. Once in the brain it becomes harder
to treat, and therefore more likely to be fatal.