毒力变异(virulence variation) ： 卡介苗BCG：Calmette和Guérin将牛分枝杆菌经13年230次传代而获得的减毒活疫苗株 耐药性变异(drug-resistance variation) ：...
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... 毒力；致病力 vieulence 毒力变异 vieulence alteration 豇豆；米豆 Vigna sinensis;cowpea ...
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目的筛选影响H5N1亚型甲型流感病毒对哺乳动物毒力变异的HA序列主要氨基酸位点。
Purpose To explore key amino acids sites on HA sequence which may determine the virulence of influenza a H5N1 for mammalian species.
玉米大斑病菌小种的毒力变异和毒力多样化可能是山西省近年大斑病再度严重发生的主要原因。
Virulence variations and diversification of the RACES may be the main cause of renewedly severe occurrence of the NCLB in Shanxi.
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。
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.
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