A bacterium called Yersinia pestis causes the plague. It's transmitted to humans by fleas.

这场瘟疫由一种名为鼠疫杆菌的细菌引发。这种细菌通过跳蚤传染给人类。

Unfortunately, prairie dogs often harbor fleas, and fleas can carry the plague.

不幸的是，鼠通常会滋生跳蚤，并且跳蚤可能带有鼠疫。

Suppose we all die of the plague? Suppose there's a war?

要是我们都死于鼠疫呢？要是爆发大战呢？

Yup, that plague, the so-called Black Death that killed millions in Europe in the 14th century.

没错，被称为“黑死病”的鼠疫在14世纪致欧洲数百万人死亡。

The researchers then reconstructed the genomes of the plague bacteria from different sites.

然后，研究人员从不同位置重建了鼠疫细菌的基因组。

The plague kills his soldiers Faster than they can be replaced.

鼠疫夺走了他的士兵 士兵更替不及。

A man has died of bubonic plague in Khovd province in western Mongolia.

蒙古西部科布多省的一名男子死于鼠疫。

This is the least common but most aggressive form of the disease.

这种疾病最少见，但却是危害大的鼠疫类型。

With the black plague, humankind lucked out that most cases affected the digestive system.

是的。幸运的是，鼠疫和霍乱都比较容易通过基本护理来治疗。对于黑死病，不幸中的万幸，大多数病例被攻击的是消化系统。

The other two ways to get sick were in the lungs and the bloodstream, right?

腺鼠疫，是的。另外两种感染的类型是肺型和败血症型，对吧？

The plague caused 100,000 deaths in London alone in the 1600s.

【plague】17 世纪，鼠疫仅在伦敦一地就造成了10万人死亡。

The finding suggests that the plague was introduced to Europe just one time.

这项发现表明，鼠疫只在欧洲传播了一次。

He says the number of cases of plague appears to be higher than in recent years.

他说鼠疫病例的数量似乎比近几要多。

There is another disease that can cause as much attention and fear – the plague.

但是还有另一场疫情也引起了同样的重视和害怕—鼠疫。

The plague never completely disappears. It may stay in the wild for 10 or 20 years.

鼠疫从未彻底消亡，可以还要在野外存在10到20。

The first case of the plague was identified on August 31. The patient died three days later.

第一起鼠疫病例是在831日确诊的，病人三天后死亡。

Mongolia's health authorities urged citizens not to hunt or eat marmot to prevent the spread of bubonic plague.

蒙古国卫生部门敦促公民不要捕猎或食用旱獭，以防鼠疫蔓延。

From smallpox to influenza to the plague, there was often no medical treatment to prevent or cure these diseases.

从天花到流行性感冒再到鼠疫，人们常常没有医疗手段来预防或治愈这些疾病。

Except for the prairie dogs that get eaten. And the Yersinia pestis bacteria that cause plague.

当然，除了被吃掉的鼠和引发鼠疫的鼠疫耶尔森氏杆菌。

Pneumonic plague is regarded as more dangerous because it spreads from person to person rather than through flea bites.

肺鼠疫被视为最危险的疾病，因为它能在人之间传播，而不是通过跳蚤叮咬。