Five deadly diseases in the world that shape of human history
News24xx.com - In the development of human history, there are many diseases that grow in the world. Starting from minor diseases such as flu until serious diseases like AIDS. But did you know, some of the diseases have a huge impact for human life.
Stefan Chin, a presenter of SciShow said, there are five diseases that have changed of human history.
Why ? Because these five infectious diseases are very deadly and have to killed many people in the worldwide.
1. Chicken pox
In the past, the disease of chicken pox has killed nearly 30 percent of humans in the worldwide. The disease was well known because having a major impact, when colonialists from Europe came to America.
The main characteristic of chicken pox is the appearance of wounds that containing with pus fluid on the patient's skin.
"This disease causes by Variola virus that infects and kills many sufferers," said Stefan.
2. Pes
Pest disease is caused by the bacterium Yersinia pestis. In medieval Europe, this plague kills millions of humans. It was estimated that a quarter or half of the human population in Europe was destroyed.
Symptoms of this disease are usually high fever, chills, and can cause death.
3. Cholera
This disease can makes the sufferers was vomiting and severe diarrhea to experience acute fluid deficiency.
Initially, cholera was spread when someone drinks of contaminated water. At that time, in 1854, a doctor named John Snow tracked down for almost all victims of cholera, after drinking from a water pump.
But people in Britain in the 1830s, a place where cholera plagued did not believe that the disease came from water, and still believe it's caused by bad air.
"Until there was a local official who wants to prove the statement of John is wrong. But, finally, he realized that John is right, because his report found an evidence that the cholera outbreak was caused by water that contamination from baby diapers. At that time, John was considered as the father of modern epidemiology," Chin said.
Cholera comes from the bacterium Vibrio cholerae and has killed about 100 thousand lives per year.
4. Syphilis
Initially, the diseases of sexually transmitted infectious of syphilis was spreading when European colonizers returned from America. The first outbreak of syphilis was recorded in 1495, when French soldiers were infected, after celebrating the victory of partying with women sex workers.
The disease caused by Treponema pallidum bacteria, that will causes of dementia, organ dysfunction, pain, and death.
Until now, syphilis is one of the first sexually transmitted diseases.
5. Hemophilia
Hemophilia is a genetic disease, which the blood of the infected person is difficult to freeze in the event of injury. In the past, the disease was struck many nobles.
At that time, the nobles in Europe has practice marriage among fellow relatives. It's meant to have 'pure blood'.
The marriage of fellow relatives is considered as an incest, and based on DNA, when two siblings have a children, there is a high probability to carrying a genetic defect.
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