The biological characteristics of the pathogenic agent of steviae leaf spot disease 甜叶菊斑枯病病原菌的生物学特性
2.
Infectious bursal disease virus ( ibdv ) is an important pathogenic agent of chicken 摘要传染性法氏囊病毒是鸡的一种重要的病原。
3.
Prions are infectious agents composed of proteins which differ from all other known pathogenic agents in that they lack a genome 这种新的致病源由于本身没有基因组而有别于已知的致病源(如细菌、病毒等) 。