2. The researchers also found that high-salt conditions increased transcription of two genes responsible for the
virulence of H. pylori.
研究人员还发现,高盐环境使得与幽门螺旋杆菌危害性相关的两个基因转录增加。
3. The other mutation with a significant effect on
virulence has been seen in the NA gene of two influenza virus strains that infect mice.
另一种对病毒毒性具有重要影响的突变,存在两种感染小鼠的流感病毒株的na基因上。