virulence

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Then we can really start to look at the genetic variation within the species and gain insight into some of the genes involved in drug resistance or virulence.
然后我们才能真正地开始寻找该物种的种内遗传变异，并获得和耐药性或毒力有关的一些基因的信息。
For all its virulence, the latter spreads most easily when animals are in close contact with each other, so restricting the movement of animals isolates the virus and stops it from spreading.
因为对于口蹄疫及它所有的毒性而言，病毒最容易的传播途径是通过动物之间的紧密接触；所以限制动物的自由移动就可能隔离病毒、断绝传播源。
Without that information, it is also impossible to determine the new disease’s virulence, fatality rates and so on.
而且如果没有这些诊断信息，也根本不可能决定这种新型病毒的毒性及致死率等。

HIV's ability to replicate (known technically as its virulence) may have decreased since the start of the pandemic.
ECONOMIST: In one part of Europe, HIV may be getting less virulent
But his apparent lack of negotiating space reflects both his own weakness and the virulence of anti-American sentiment among ordinary Pakistanis.
ECONOMIST: The NATO summit

Virulence is great bitterness and hostility.
The virulence of a disease or poison is its ability to harm or kill people or animals.

毒力
Virulence test showed the isolate was highly virulent(LD50=5×103CFU).
毒力试验显示，分离株对小鼠的LD50为5×103CFU,具有很强的致病性。
毒性
A lack of correlation between the virulence and RAPD dissimilarity matrices was observed, indicating the independence of DNA polymorphism from virulence diversity.
结果表明，DNA多态性与毒性多态性之间没有相关性。
致病力
In order to pinpoint the key amino acids that affected virulence, we generated many PA mutant viruses and tested them on ducks.
为进一步在PA上寻找其影响致病力的关键位点,我们拯救出一系列PA突变的病毒,并且做了感染家鸭实验。
医药科学
毒力
The expression of virulence genes of Shigella is temperature-dependent.
痢疾杆菌毒力的表达是温度相关的。
耐药性
Genetic mutation in viruses are usually associated with escape of host immune responses, developing drug resistance, modification of virulence and patterns of epidemiology of diseases.
病毒的基因变异与逃避机体免疫应答、出现耐药性、改变致病性和引起疾病流行等有关。
致病力；病毒性
毒务

致病力
Avian influenza with low virulence is characterized by respiratory symptom and low productirty.
低致病力禽流感常引起呼吸道症状，产蛋量下降。
毒力
毒性
致病力;侵入性