According to an article written by Dr. Charlotte Houldcroft from the University of Cambridge, researchers have created a new study suggesting that the Neanderthals from Europe may have been infected with diseases carried out of Africa by modern humans, called Homo sapiens. Since both of the species are hominin, it would have been easy for pathogens to jump from one population to another. The article is suggesting that this new finding could have been one factor that contributed to the end of the Neanderthal population.
Researchers have been reviewing some of the latest evidence that they have gathered from pathogen genomes and DNA from ancient bones. They determined that some of the infectious diseases many be thousands of years older than
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Charlotte Houldcroft a researcher from Cambridge says that there are many types of infections that have more likely been passed from humans to Neanderthals. Some of the infections that were passed are tapeworm, tuberculosis, stomach ulcers and different types of herpes. All of the infections that are listed are chronic diseases that would have seriously weakened the immune system of the Neanderthals. Because of this it made them not as fit and not able to find food for them to eat and could have helped the process of their extinction.
Some new techniques that have been developed in the last few years means that the researchers can now see into the past of modern diseases. They can do this by being able to unravel its genetic code, and by extracting DNA from the fossils to detect traces of disease. It shows that many infectious diseases have been progressing with the human population for millions of years.
This article suggested that infectious diseases probably exploded with the beginning of agriculture. Humans that coexisted with livestock created the perfect concoction for diseases to spread. Since most diseases are thought of to be zoonosis, which is the transferring of disease from humans to animals and vice versa. For the Neanderthals who lived in small foraging groups, disease would have broken out periodically, but would have been unsuccessful in spreading very far. When agriculture came around, it gave the diseases a perfect environment to repopulate drastically.
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There is still some evidence though that humans benefited from interbreeding which helped protect them from some diseases, like bacterial sepsis and encephalitis. In turn, the humans would have been adapted to African diseases, which they would have brought with them during their migration into Europe and Asia.
A bacterium that is called Helicobacter pylori, which causes stomach ulcers, is considered to have been passed on to the Neanderthals by the humans. The bacteria first started infecting the humans that lived in Africa about 88 to 116 thousand years ago. Another disease is called the herpes simplex 2, which is a virus and can cause genital herpes. There is some evidence of this disease that expresses it was transmitted to humans in Africa buy some unknown hominin species that got it from chimpanzees.
The unknown hominin species that got the virus and transmitted it between chimps and humans shows that these diseases could leap between one species to another. Since we now know that the humans intimate with the Neanderthals, all humans today carry roughly about 2 to 5% of Neanderthal DNA in them as a
Food production led to the causes of many things, some such as germs carried by farmers usually, technology, and literacy. Infections and diseases were led by various animals, being around them or being involved with them caused this. Some of the major diseases we get as humans are smallpox, tuberculosis, flu, plague, measles, malaria, and cholera. These are evolved and mainly gotten from animals, usually animals like house pets or farm animals, since humans interact with them more than other kinds of animals. Germs and microbes pass through victims and spread around fairly simple or not simple at all. Usually, the easiest way for a germ to spread is through waiting to be passed to another victim. As if someone who is “sick” is contagious and
The first disease that stood out was hemochromatosis. This disease messes up how much iron the host’s body is producing, and how it 's distributed. Usually, hemochromatosis builds up iron to dangerous levels that can harm almost any part of the host body, and may lead to death. Some symptoms include physical difficulty, an “achy feeling”, and pain in joints. Hemochromatosis was discovered to have most likely originated with the Vikings and the Vikings kept spreading the disease as they expanded their territories over Northern Europe. Though at first, hemochromatosis wasn 't diagnosed properly (nowadays, we can diagnose hemochromatosis through blood tests), it was being treated by blood-letting (which actually did and still does work). After a recent study,
People of the Old World had domesticated pigs, horses, sheep, and cattle(1), which had acted as pathogens to infect the Europeans with diseases. In addition, diseases were constantly circulated with centuries of war, exploration, and city building. During the process of natural selection, disease-intolerant
Humans were once infected by ancient viruses, but today, 8% of human DNA contains these ancient viruses
infection not only hit the humans but animals were also able to contract it. Not many people
Amazonian Indians and Pacific Islanders, however, were not able to develop these kinds of diseases, since they lived a nomadic lifestyle devoid of complex agriculture. Because they constantly moved in small groups, did not settle down, and did not live in close proximity with domesticated animals, they were unable to develop the bacteria that led to diseases, like the Eurasians did, leading to the gap in disease vulnerability.
Human mobility, in terms of European transcontinental exploration and colonization, began to truly flourish after the 1400s. This travel, inspired by financial motives and justified by religious goals, resulted in the European dominance and decimation of countless cultures in both the Americas and Eurasia. While at first glance it seems as though this dominance was achieved through mainly military means - European militias, like Spanish conquistadors, rolling over native tribes with their technologically advanced weapons - the reality is significantly more complex. The Europeans, most likely unknowingly, employed another, equally deadly weapon during their exploits.
In Chapter 11, Diamond talks about how infections from diseases carried by animals where the “killers of humanity”. Diseases would start in animals and then get transferred to humans where it would mutate and spread across human populations killing almost anyone it touches. When Europe went to conquer the New World, disease such as smallpox, measles, and the flu, killed up to 95% of the population of Native Americans. Syphilis, however, may have been brought back to Europe from the New World, even though no one knows how.
The fossils which passed the amino acid tests were called “transitional” elements between the two species. They represented a part of Europe where the Neanderthals and early humans would have more than likely encountered each other. The same DNA sequence was found in Neanderthals and early humans, but also in ancient cave bears from Croatia and Austria. This made the researchers skeptical of their findings and decided to test for mtDNA stands. When the fossils were further analyzed, the researchers found that the mtDNA embedded in the Neanderthal fossils was of a different strain than that in the early humans, which was of course, different from that of the ancient cave bears.
The first Neanderthal fossils found in Europe, a fragmented child’s cranium in Belgium in 1830, and an adult cranium in Gibraltar, were not immediately recognized as a divergent kind of human. Only in 1856 after a partial skeleton was found in a cave in the Neander Valley in Germany it became clear that these fossils belonged to an extinct human and our closest evolutionary relative (Hublin and Pääbo, 2006). Since then, questions about their relationship with modern humans have been fiercely debated between anthropologists. But what attracts most interest from scientists and popular media is the possibility of hybridization between Neanderthals and modern humans if, in other words, they were a genetically different specie or a
The transmission of these diseases resulted in progression of human history because it increased awareness, knowledge and eventually cures for some. However, this progression did not come without some downfalls. The disease introduced to the New World caused the Indians to die in droves but it also allowed new cultures to be formed. “Disease took more than human life; it extinguished entire cultures and occasionally helped shape new ones” (Kennedy and Cohen 30; Ch.2). The introduction of Syphilis to the Old World also aided in progression because now we have knowledge about the disease and today syphilis is nonfatal and can be treated with
The Americas before colonization were certainly not free of disease, but the natives had developed immunities to the diseases to which they had been exposed. The Europeans brought with them a plethora of new diseases to which the Native Americans had no immunities, and the results were catastrophic. Due to nearly all of diseases being communicable by air and touch, they spread like wildfire. The diseases the explorers brought included smallpox, measles, chicken pox, whooping cough, diphtheria, scarlet fever, trachoma, malaria, typhus fever, typhoid fever, influenza, cholera, and bubonic plague. However, the Europeans contracted several new diseases from the natives; these diseases included yellow fever and syphilis. Among the diseases spread to the New World, smallpox had the most devastating effect, followed by measles, influenza, and bubonic plague respectively. It has been estimated that between 25% and 50% of the Native American population was affected by smallpox. While the exact impact of these illnesses is hard to be sure of, it is inarguable that these epidemics had a devastating effect on the Native American
When Europeans first came to this continent, they brought diseases with them, such as smallpox, influenza, and tuberculosis. Later, slaves shipped to America from Africa brought even more diseases, such as yellow fever and malaria. Ever since, American history has been riddled with infectious diseases and epidemics. Although the United States has eliminated some horrible diseases that plagued it in the past, and helped other countries cope with epidemics, deadly diseases still pose problems in America.
The colonization of Africa created countries riddled with disease because they forced the native Africans away from their homes to mine and take away the continent’s resources. Putting all those people with the people who have already been infected together, germs are spread
In the Old Stone Age (30,000 to 7000 BCE), individual small groups of hunters and gatherers led a nomadic existence rather than living in larger groups with other people. This lifestyle and the absence of domesticated animals limited the spread of disease. Most infections in this period occurred as a result of one of several distinct factors: trauma, zoonotic diseases, and animal diseases that spread to humans; or infections acquired by eating, being injured by, or having contact with wild animals and their excreta. In addition, some diseases would have been contracted from the soil, such as anaerobic bacteria that penetrate the skin, and tapeworms (Arnott 2008). The New Stone Age occurred in Europe and the Near East from approximately