this finding long suggested that wild waterfowl are not agents for the onward transmission of these viruses.
这一发现长期以来表明,野生水禽不是传播这些病毒的媒介。
outbreaks in both countries have been attributed to contact between domestic birds and wild waterfowl via shared water sources.
在这两个国家发生的暴发是由家禽和野水禽之间通过共同水源接触造成的。
this finding long suggested that wild waterfowl are not agents for the onward transmission of these viruses.
这一发现提示野生水鸟并非是病毒传播给禽类的直接宿主。
wild waterfowl have been known for some time to be the natural reservoir of all influenza a viruses.
一段时间以来,已知野水禽是所有a型流感病毒的自然宿主。
wild waterfowl are the natural reservoir of all influenza a viruses, and these viruses are usually nonpathogenic in these birds.
野生水鸟是所有甲型流感病毒的自然储存宿主,通常这些病毒对它们不具有致病性。
wild waterfowl are considered the natural reservoir of all influenza a viruses.
野生水鸟是a型流感病毒的天然宿主。