The capsule is considered an important virulence factor since the strains that lack a capsule are less virulent.

荚膜被认为是重要的毒因，因为缺少荚膜的菌株毒相对较弱。

This capsule is a major virulence factor because of its antiphagocytic ability.

荚膜具有抗吞噬的作用，所以是其主要的毒因。

Now coronaviruses that circulate among the humans are typically benign, and they cause a quarter of all common cold illnesses.

通常情况下，人与人之间传播的是毒相对弱的冠状病毒，约占普通感冒病因的1/4。

H. pylori can make over 1,500 proteins, many of which are dedicated to maximizing its virulence.

幽门螺杆菌可以制造 1, 500 多种蛋白质，其中许多专门用于最大限度地发挥其毒。

Some bacteria can also have another extra layer on top of the cell wall called a capsule, which is a major virulence factor.

一些细菌还有包裹在细胞壁外面的荚膜，是主要的毒因。

As a result, a less lethal myxo virus spreads baby viruses to more rabbits than did the original, highly virulent myxo.

因此，与最初的高毒粘液病毒相比，致命性较低的粘液病毒将婴儿病毒传播给更多的兔。

Now, Klebsiella pneumoniae has a number of virulence factors that are like assault weaponry that help it attack and destroy the host cells and evade the immune system.

肺炎克雷伯杆菌具有多种毒，可以攻击宿主细胞，并逃避免。

It has a bunch of virulence factors such as capsule, LPS, pili, and a siderophore, which helps the bacteria to attack and destroy the host cells and evade the immune system.

它具有多种毒因，如荚膜、脂多糖、菌毛以及铁载体；铁载体帮助细菌攻击宿主，破坏机体细胞，并逃避人体免。

When the typhus fever had fulfilled its mission of devastation at Lowood, it gradually disappeared from thence; but not till its virulence and the number of its victims had drawn public attention on the school.

斑疹伤寒在洛伍德完成了毁灭性的使命后，便逐渐从那里消失了。但直到它的毒和受害者的数量引起了公众对学校的关注。