However, not all viruses of the H5 and H7 subtypes are highly pathogenic and not all will cause severe disease in poultry.
然而,并非所有的H5和H7亚型病毒都是高致病性的,也并非所有此类病毒都可在家禽中引起严重疾病。
2
AI viruses are divided into two groups based on their ability to cause disease in poultry: high pathogenicity or low pathogenicity.
按照在禽类群体中的致病力,可将禽流感病毒分为两类:高致病性或低致病性。
3
It spreads very rapidly through poultry flocks, causes disease affecting multiple internal organs, and has a mortality that can approach 100%, often within 48 hours.