禽流感的传染源主要是鸡、鸭,特别是感染了H5N1病毒的鸡,目首已有证据显示病人也可以成为传染源;在自然条件下,存在于口腔和粪便的禽流感病毒由于受到有机物的保护具有极强的抵抗力,特别是在凉爽和潮湿温和的条件下可存活很长时间,病毒在干燥尘埃中可存活2周,在4℃可保存数周, The main source of bird flu infection is chickens and ducks, especially chickens infected with H5N1 virus. At the head there is evidence that patients can become sources of infection as well. Under natural conditions, the bird flu virus present in the mouth and excrements is affected by organic matter Of the protection has a very strong resistance, especially in cool and humid conditions can survive a long time, the virus can survive in dry dust for 2 weeks at 4 ℃ can be stored for several weeks,