本发明涉及牛支原体的新的减毒株。
The present invention relates to new attenuated M. bovis bacteria strains.
结论 有毒株钩体对内皮细胞单层的穿透能力明显强于减毒株和腐生型钩体；
Conclusion The invasive ability of virulent leptospires is much stronger than both attenuated and saprophytic leptospires.
结论乙脑病毒减毒株sa14 - 14 - 2的遗传学特性稳定，从分子水平证明了乙脑减毒活疫苗的安全性。
Conclusion The JEV attenuated strain SA14-14-2 is genetic stability after passaged continuously on PHKC to 20 generations, and proved a good safety on molecular level.
目的建立水痘带状疱疹病毒(VZV)毒株的特异性鉴定方法，研究我国分离的VZV84 7减毒株(VZV84 7株)基因特征。
Objective To establish a specific method for identifying varicella-zoster virus (VZV) strains and analyze the genetic characteristics of VZV84-7, an attenuated VZV strain isolated in China.
目的建立水痘带状疱疹病毒(VZV)毒株的特异性鉴定方法，研究我国分离的VZV84 7减毒株(VZV84 7株)基因特征。
Objective To establish a specific method for identifying varicella-zoster virus (VZV) strains and analyze the genetic characteristics of VZV84-7, an attenuated VZV strain isolated in China.
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