The reason is a microscopic organism called Toxoplasma gondii.

原因在于一种叫做刚地弓形虫的微生物。

And then arches are actually very rare.

而弓形其实非常罕见。

Definitely behaviour that is beneficial to toxoplasma, but absolutely not for the rodent.

绝对是有益于弓形虫的，但绝对不是啮齿动物。

" The story about Toxoplasma gondii manipulating the behavior of its host is simply fascinating."

“弓形虫操纵宿的故事简直令着迷。”

Not so when researchers recently injected mice with Toxoplasma gondii.

研究员最近给小白鼠注射弓形虫却没符合惯例。

Most people have probably heard of Toxoplasma gondii, the parasitic protozoan that causes toxoplasmosis.

大多数可能都听说过刚地弓形虫，这种寄生性原生动物会引起弓形虫病。

Right whales have round bodies with arching rostrums, V-shaped blowholes and dark grey or black skin.

露有圆形的身体，弓形的吻部，V 形的喷气孔和深灰色或黑色的皮肤。

That's because some cats carry a parasite called toxoplasmosis and it can cause birth defects.

这是因一些猫携带一种叫做弓形虫的寄生虫，它可能会导致胎儿畸形。

And the hoops were made by soldiers, who turned over and stood on their hands and feet.

弓形小球门由士兵组成，他们转过身去，红鹤腿着地站着。

But there is a microorganism called Toxoplasma that needs both cats and rodents to complete its life cycle.

有一种寄生虫叫弓形虫牠需要猫和老鼠来繁殖。

In fact it's one of the most stable arches in nature, so sound that we still use it today.

事实上，这是自然界中最稳固的弓形之一，如今我们仍然常常用到。

A similar process happens with toxoplasma and mice which breeds in the digestive system of cats.

类似的过程发生在猫的消化系统中繁殖的弓形虫和老鼠身上。

Rodents that get infected with toxoplasmosis actually makes these rodents attracted to cat urine.

感染弓形虫病的啮齿动物实际上会被猫尿所吸引。

Toxoplasmosis isn't only found in the cat litter.

弓形虫不仅仅存在于猫砂中。

New research shows that gray wolves get infected with toxoplasma by interacting with cougars and their feces, which carry the parasite.

新的研究表明，灰狼通过与携带寄生虫的美洲狮及其粪便相互作用而感染弓形虫。

In the United States, it's less ubiquitous and we don't find that there's a need to test for it.

在美国，弓形虫的普遍性较低，因此我们认没有必要进检测。

Toxoplasmosis, which is not very harmful to other felids, has a very high fatality rate among young Pallas' cats, Qi said.

齐说，弓形虫病对其他动物危害不大，但在兔狲幼猫中死亡率非常高。

There's a parasite known as toxoplasmosis that lives in the bodies of rats.

有一种寄生虫叫做弓形虫， 它寄生在老鼠的身体里。

We're talking about toxoplasmosis, a disease caused by Toxoplasma gondii.

我们正在讨论的是由刚地弓形虫引起的弓形虫病。

Toxoplasma also nestles into our brains and meddles with our behavior behind the scenes.

弓形虫也会潜入我们的大脑，在幕后操纵我们的。