Chickens and other domestic fowl often serve as Bridges for new flu viruses that pop up in wild birds and later cause human outbreaks.

鸡和其他家禽常被认为是导致人类感染野生鸟类流感病毒的桥梁。

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Wild red jungle fowl, progenitors of the modern chicken, crowd a pen near Statesboro, Georgia.

野生红原鸡是现代家鸡的祖先。 在乔治亚州斯泰茨伯勒市附近，它们和其它家禽被人类圈养在围栏里。

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Avian influenza (AI) is an infectious viral disease of birds (especially wild water fowl such as ducks and geese), often causing no apparent signs of illness.

禽流感是鸟类病毒性传染病(特别是鸭子和鹅等野生水禽)，通常导致无明显体征的疾病。

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