The highly pathogenic form is far more dramatic.
高致病形式表现得更为明显。
A highly pathogenic form of avian influenza has been on the rise since mid 2003.
高致病性禽流感自2003年中以来一直在增加。
Only viruses of the H5 and H7 subtypes are known to cause the highly pathogenic form of the disease.
据知，只有H5和H7亚型病毒可引起高致病性禽流感。
Recent events make it likely that some migratory birds are now implicated in the direct spread of the H5N1 virus in its highly pathogenic form.
最近的事件表明一些候鸟有可能涉及直接传播高致病型H5N1型病毒。
Recent events make it likely that some migratory birds are now directly spreading the H5N1 virus in its highly pathogenic form. Further spread to new areas is expected.
最近的流感表明一些候鸟可直接传播高致病性的病毒并有可能进一步传播到其它地方。
Considerable circumstantial evidence suggests that migratory birds can introduce low pathogenic H5 and H7 viruses to poultry flocks, which then mutate to the highly pathogenic form.
相当多的旁证表明侯鸟能够传播低致病性禽流感的H5和H7亚型病毒给家禽，然后，变异成高致病性类型。
The final form of the virus, biomedical researchers fear, will be a highly pathogenic strain of influenza that spreads easily among humans.
生物医学研究者担心，禽流感病毒将变异为这种流感高致病菌株的形式在人类之间广泛传播。
The final form of the virus, biomedical researchers fear, will be a highly pathogenic strain of influenza that spreads easily among humans.
生物医学研究者担心，禽流感病毒将变异为这种流感高致病菌株的形式在人类之间广泛传播。
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