They calibrate our immune systems, ward off pathogenic bacteria, even affect our weight.

它们帮助我们调整免疫系统、抵御病原菌、甚至还会影响到我们体重。

A microorganism can be pathogenic, or not.

微生物以是致病，以不是。

It's the rare, pathogenic strains that can cause bloody diarrhea, kidney disease, or death.

导致出血性腹泻、肾病或死亡是极少数致病株。

YURKEVICH: The highly pathogenic avian influenza, or avian flu, is largely to blame.

高致病性禽流行性感冒（禽流感）很大程度上来讲是罪魁祸首。

They also grew a batch of pathogenic E. coli bacteria, the kind that cause traveler's diarrhea.

他们还培养了一批致病性大肠杆菌，这是导致行者腹泻一种细菌。

If as scientists have said it has only changed the pathogenic genes of AIDS without changing other genes.

如果说就像科学家说，它只改变了艾滋病致病基因，而没有改变其他基因。

The 1918 virus instead could proliferate even in the absence of trypsin, making it more pathogenic than other viruses.

1918病毒甚至在没有胰蛋白酶情况下能增殖，这使得它比其他病毒更具致病性。

After that they all got a dose of pathogenic E. coli — the strain behind last year's spinach outbreak.

再然后，所有老鼠都注射了致病性大肠杆菌——去毒菠菜事件后菌株。

To study how a pathogenic strain of E. coli behaves in this entire system, researchers had to build a replica.

为了研究大肠杆菌致病菌株在整个系统行为，研究人员不得不复制了系统。

First is the PZ, or pathogenic zombies.

首先是 PZ， 即致病僵尸。

These kinds of cells need to go crawling around in our bodies in order to find invaders like pathogenic bacteria.

这些细胞在我们身体里四处爬行，以便发现诸如病菌这样入侵者。

For example, you may have heard of pathogenic bacteria like staph evolving antibiotic resistance.

例如，您能听说过葡萄球菌等致病菌会产生抗生素耐药性。

Right. Then maybe we can stop them from becoming pathogenic in the first place.

没错。那么许我们以阻止它们从一开始就成为致病菌。

With pathogenic fungi becoming ever more resistant to existing anti-fungals, dung beetles have never looked more attractive.

随着致病真菌对现有抗真菌药物抵抗力越来越强，蜣螂变得前所未有有吸引力。

When pathogenic factors attack the body, healthy qi in the body naturally fights against them.

当致病因素攻击身体时，体内正气会与它们作斗争。

But you should keep in mind that far less than one percent of microbial diversity is actually pathogenic to humans.

但你应该记住，只有不到百分之一微生物多样性实际上对人类是致病。

These changes may increase pathogenic organisms or their activity causing a series of oral infectious diseases such as dental caries or periodontal diseases.

这些改变能会增加致病微生物数量或提高其活性，从而导致诸如龋齿、牙周疾病等一系列口腔感染性疾病。

We are justified in postulating these goals because they follow logically from a knowledge of the pathogenic factors in neurosis.

我们有理由设定这些目标， 因为它们乎逻辑地源自对神经症致病因素了解。

U.S. officials recently informed the World Organization for Animal Health about the first reported appearance of highly pathogenic H5N9 bird flu in U.S. poultry.

美国官员最近向世界动物卫生组织通报了美国家禽中首次发现高致病性H5N9禽流感病毒情况。

Working with a team of colleagues, he then exposed them to nine strains of pathogenic fungi that cause serious problems in agriculture.

随后，他与一个同事团队作，让他们接触了九种会给农业带来严重问题致病真菌。