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

绝对是有益于弓形虫的行为，但绝对不是啮齿动物。

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。

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。

Regardless, toxoplasma has definitely benefited from humans to become one of the world's most successful parasites.

尽管如此，刚地弓形虫无疑已从人类中获益，成为成功的寄生虫之一。

As we know it today, toxoplasma gondii is a parasite whose infective life cycle depends on cats.

现今，我知道，弓形虫这种寄生虫的生命周必须仰赖猫。

There wasn't a good explanation for this until the discovery of the toxoplasma life cycle in cats.

一直以来科学家都没有办法解释为何如此，直到我发现了弓形虫生命周和猫之间的关联。

This is contrast to marsupials and monkeys in America and Europe who did evolve alongside cats and toxoplasma.

这与生活在欧洲及美洲的有袋动物和猴子形成了对比，因为它演化的过程中，一直以来都和猫科动物及弓形虫有所接触。

Today, we tell pregnant women not to clean the cat's litterbox, for risk of transmitting toxoplasma to the unborn baby.

现今，我会告诉怀胎的孕妇避免清理猫砂，以免将弓虫垂直感染给还在体内的婴儿。

Now, but wait. If animals and humans evolved to prevent susceptibility to toxoplasma, why did DD get it?

等等，回过头来，如果动物和人会演化出抵抗弓形虫的能力，那为什麽DD会发病呢？

Wolves infected with toxoplasma are more likely to wander away from their former pack to find a new one and are more risk-taking, more bold.

感染弓形虫的狼更有可能离开原来的狼群去寻找新的狼群，而且更冒险，更大胆。

Now this research is still very much in its early stages, but it looks like toxoplasma could potentially be engineered to deliver therapeutic proteins to the brain.

这项研究仍处于早阶段，但看起来弓形虫有可能被用来向大脑输送治疗性蛋白质。

The wolves studied recently in Yellowstone National Park could be drifting near to the source of their infection, cougars, because toxoplasma reproduces only in the stomach of felines.

近在黄石国家公园被研究的狼可能漂流到它的感染源美洲狮附近，因为弓形虫只在猫科动物的胃里繁殖。

It also slows reactions and decreases concentration, which may be why one study found that people involved in traffic accidents were almost three times more likely to have toxoplasma.

它还会减缓反应速度并降低专注力，这或许解释了一项研究结果：遭遇交通事故的人中， 感染弓形虫的可能性几乎是常人的三倍。

Hep. A may not be a latent infection in the same way that toxoplasma is, but it is another part of the human experience of living in a world where we coexist with microorganisms.

A型肝炎或许不会像弓浆虫一样变成潜伏的疾病，但却是个人和微生物共同生活在一起的好例子。