There are more phages on earth than every other organism combined, including bacteria.

地球上所有的有机体加起来也没有噬菌体的数量多，包括细菌。

In the West, there have been successful phage trials for foot ulcers.

在西方，已经有成功的噬菌体试验治疗足溃疡。

A phage is a virus; not quite alive, not quite dead.

噬菌体毒；然而它并不完全活的，也不完全死的。

But phages also have major flaws.

然而，噬菌体有个最大的缺点。

Like any other virus, phages need a host to survive and reproduce.

像所有其他的毒样，噬菌体需要宿主来存繁殖。

This happens when phages, rather than killing their hosts immediately, integrate their genomes into those of their prey.

当噬菌体不立即杀死宿主，而将自己的基因组整合到猎物的基因组中时，就这情况。

Phages, viruses that attack bacteria but don't affect humans, are one promising new avenue to combat bacterial infections.

噬菌体，能攻击细菌但不感染人体的毒，个很有前景的对抗细菌感染的新途径。

That helps the phages, because their bacterial prey also accumulate in mucus, which is thus a rich hunting ground.

这有助于噬菌体，因为细菌的侵染过程也积聚在粘液中，这就为噬菌体提供了大量的寄宿主。

Which might make you nervous since phages are responsible for the majority of deaths on earth but you're lucky.

可能世界上大部分死亡都由噬菌体导致的，这事实让你感到紧张，然而你很幸运。

Several clinical trials of phage therapy have already been successfully conducted in Poland, the nation of Georgia and Bangladesh.

波兰、格鲁吉亚和孟加拉国已经成功地进行了若干噬菌体治疗的临床试验。

Usually, a phage has chosen one specific bacteria and maybe some of its very close relatives.

通常情况下，个噬菌体只寄某细菌以及些它们的近亲。

The side touching the food is coated with phage E2, a virus engineered to stick only to Salmonella typhimurium bacteria.

触摸食物的边涂有噬菌体E2, 这被研成只依附鼠伤寒沙门氏菌的毒。

Smith's method is known as “phage display.”

史密斯的方法被称为“噬菌体展示”。

The way the phage hunts is with its feet.

噬菌体捕食的方式用脚。

Typically, a phage will only infect a single bacterial species.

通常， 噬菌体只感染细菌。

Phages need a healthy population of bacteria  to survive.

噬菌体需要健康的细菌群落才能存。

But for the  phage and bacteria this is great.

但对于噬菌体和细菌来说, 这很棒。

New phages are released and begin the cycle anew.

新的噬菌体就此诞，并重复上述的循环。

In a weird motion, the phage squeezes its tail and injects its genetic information.

用奇怪的动作，噬菌体将它的遗传信息通过它的尾巴挤进细菌中。

They only stop when the bacteria is filled up with brand-new phages.

直到整个细菌充满了新造好的噬菌体。