致弱的英文

• attenuation
• debilitating

• 致:    deliver; send; extend
• 弱:    weak; feeble
• 致弱病毒:    attenuated virus
• 致弱毒株:    attenuated strain
• 致弱活毒:    modified live virus

例句与用法

1. Reverse genetics study of infectious bursal disease virus
   3基因在病毒致弱过程中的变异研究
2. Comparative study on the characteristics of immune response induced by 97kda dna and uv - attenuated cercariae vaccines of schistosoma japonicum
   疫苗与致弱尾蚴疫苗诱导免疫应答特征的比较研究
3. The vaccine was developed by passaging eiav strain liaoning ( eiav l ) in donkeys in vivo , obtaining a donkey - adapted virulent equine infectious anemia virus ( eiav da ) and then passaging it in donkey leukocyte cultures for more than 120 times in vitro
   该毒株是将eiavl株（ eiavl ）通过驴体传代，使其毒力明显增强，然后在驴白细胞培养物上连续传代致弱获得的。
4. On our conjecture , gene 3a , a highly conserved sequence , may be the determinant of the virulence of fmdv . changes in 3a have been associated with altered host range . a deletion in 3a has been associated with bovine attenuation of fmdv
   我们根据已有资料推测， 3a基因可能是口蹄疫病毒的毒力决定簇，它具有高度保守性，其变异和部分缺失对病毒在牛体内的致弱和宿主嗜性发生改变起重要作用。
5. Researches of schistosomiasis vaccines have gone more than 60 years , approximately including from the stages of dead vaccine and live vaccine ( irradiated attenuated cercariae vaccine ) to gene engineered vaccine , etc . many different forms of vaccines have been tested in animal models , including gluthathione s - transferase , paramyosin , irv - 5 , triose phosphate isomerase , sm23 , fatty acid binding protein ; which were considered promising by who / tdr . but none of them steadily accomplished the pre - set target level of 40 % protection . in order to enhance the protective capacity further , it is essential to develop novel vaccine antigens and / or vaccine adjuvants
   血吸虫病疫苗研究已有60多年的历史，大致经历了死疫苗、活疫苗(照射致弱尾蚴疫苗)和基因工程疫苗等研究阶段，产生了一些who / tdr推荐认为很有希望的疫苗候选分子，如谷胱甘肽- s -转移酶( gst ) 、副肌球蛋白( sm97 ) 、照射致弱疫苗抗原5 ( irv - 5 ) 、磷酸丙糖异构酶( tpi ) 、曼氏血吸虫膜内在蛋白( sm23 )和脂肪酸结合蛋白( fabp ， sm14 )等，但其对宿主的保护作用均不甚理想，未能稳定地达到40或以上的保护力水平，因此有必要继续寻找新的疫苗抗原分子和/或疫苗佐剂，进一步提高其保护力。