virulent strain

基本解释

Scientists found DNA from the malaria parasite Plasmodium falciparum in Tut’s body, indicating that he suffered from a particularly virulent strain of the disease.
科学家现在图坦卡蒙体内发现来自疟原虫（恶性疟原虫）的DNA，表明图坦卡蒙曾经患有特殊的带有毒菌株的疾病。
One in five lung cancer sufferers have a particularly virulent strain called small cell lung cancer which kills all but three per cent of sufferers within five years of diagnoses.
1/5的癌症患者带有一种特别的有毒病株，称为小细胞肺癌，这种肺癌五年内杀死了近3%的确诊患者。
The authors argue the version of the disease that caused the medieval plague is likely extinct, but suggest that further study could reveal how it may have evolved into a less virulent strain.
作者们称引起中世纪瘟疫的品种可能已经灭绝了，但是他们认为进一步的研究可以揭示它是如何进化到一种没那么致命的类型。

It's a virulent strain that occurs when a person with TB fails to complete the six to nine-month course of medication or catches TB from another person who is ill with a drug resistant-strain.

No target is too mighty, or too obscure, for this new and virulent strain of oratory.
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Half of the victims have been hospitalised, a high rate that may indicate an especially virulent strain of E. coli.
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They then subdivided the groups and infected the resulting subgroups with either H3N1, a mild strain of influenza, or H1N1, a virulent strain.
ECONOMIST: A new way to protect against infection is undergoing tests