Effects of the chinese herbal medicine immunopotentiator on the immunity with ilt vaccine and virulent strains in chickens .

中药免疫增强剂对鸡ilt疫苗免疫和强毒攻击的影响。

Studies conducted at the university of georgia , usa , established that infectious laryngotracheitis strains can be classified into nine categories based on an analysis of four regions of the ilt genome .

在美国乔治亚州立大学进行的一项研究中，科学家们基于对传染性喉气管炎病毒基因组的。