bubonic plague killed what percent of the human population?
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The Black Death, caused by the bacterium Yersinia pestis, wiped out 30 to 50 percent of Europe's population between 1347 and 1351. But, this is just the most infamous of the little microbe's shenanigans.
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Plague is divided into three main types — bubonic, septicemic and pneumonic — depending on which part of your body is involved. Signs and symptoms vary depending on the type of plague.
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Revelation 18 reads: "Therefore her plagues will come in one day - death and grief and famine - and she will be consumed by fire, for mighty is the Lord God who judges her." Plague is also mentioned in the Book of Hosea in the Hebrew Bible.
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Bubonic plague: Patients develop sudden onset of fever, headache, chills, and weakness and one or more swollen, tender and painful lymph nodes (called buboes). This form usually results from the bite of an infected flea. The bacteria multiply in the lymph node closest to where the bacteria entered the human body.
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Of all species that have existed on Earth, 99.9 percent are now extinct. Many of them perished in five cataclysmic events. According to a recent poll, seven out of ten biologists think we are currently in the throes of a sixth mass extinction.
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In 430 BC an outbreak of a plague hit Athens. The plague ravaged the densely packed city, and in the long run, was a significant cause of its final defeat. The plague wiped out over 30,000 citizens, sailors and soldiers, including Pericles and his sons. Roughly one-third to two-thirds of the Athenian population died.
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Now, of course, fleas no longer kill millions of people. But as it turns out, they still transmit plague, they're still a nuisance, and they're still incredibly difficult to kill. Fleas are one of the oldest pests on the planet. In fact, primitive fleas were dining on dinosaur blood about 165 million years ago.
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Wages rose 12-28 percent after the Black Death. Land rents and prices became lower as more land became available because of all the deaths. Before the plague, the population was high, peasants' wages were low and rents and prices high.
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To put things in perspective, about 100 people a year (all numbers in the US only) are killed by horses, just over 20 killed by cattle, and a comparable number are likely killed by pigs. The most common way to die from animals is either by vehicle collisions or by diseases for which animals are vectors.
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Bubonic plague is mainly spread by infected fleas from small animals. It may also result from exposure to the body fluids from a dead plague-infected animal. In the bubonic form of plague, the bacteria enter through the skin through a flea bite and travel via the lymphatic vessels to a lymph node, causing it to swell.
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Inoculation of very few bacteria is sufficient to induce high immune response in wild rats, allowing their survival after infection. A great heterogeneity of rat immune responses was found within and between villages which could heavily impact on plague epidemiology.
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The Black Death is possibly the most famous plague that Britain suffered; however, it is often confused with the Great Plague of 1665-6. The plague of 1665-6 was predominantly bubonic plague and as such the symptoms of most victims were very similar to those affected by the Black Death.
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"The plague was caused by the bacteria Yersinia pestis, which is still very much alive and well around the world and generally seen in animal populations, and transmitted by the bite of a flea." Two new cases of the plague were confirmed in New Mexico's Santa Fe County on Tuesday, health officials said.
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Maggots can consume up to 60 percent of a human body in under seven days [source: Australian Museum]. The environment in which a dead body is placed also affects its rate of decay.
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World War II was the deadliest military conflict in history. An estimated total of 70–85 million people perished, which was about 3% of the 1940 world population (est. 2.3 billion). The tables below give a detailed country-by-country count of human losses.
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Rats have long been blamed for spreading the Black Death around Europe in the 14th century. Specifically, historians have speculated that the fleas on rats are responsible for the estimated 25 million plague deaths between 1347 and 1351.
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In cases of plague since the late 1800s—including an outbreak in Madagascar in 2017—rats and other rodents helped spread the disease. If Y. pestis infects rats, the bacterium can pass to fleas that drink the rodents' blood. When a plague-stricken rat dies, its parasites abandon the corpse and may go on to bite humans.