	禽流感关键词

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禽流感常见的询问回答

什么是禽流感

禽流感，或称“鸟流行感冒”，是一种由病毒造成的动物类接触性传染病，通常仅感染鸟类，还可能感染猪。禽流感病毒有高度的种属特异性，不过，在极少的情况下，它可跨越种属障碍感染人类。在家养的禽类中，由禽流感病毒造成感染促成两种疾病，分别为高和低的两个极端毒性类型。所谓“低致病性”通常造成轻度的症状（羽毛变皱或粗糙，产蛋量下降）和在不易察时自愈。高致病性远比此严重。它可在家禽群间快速传播，造成禽类的多脏器的患病，致死率达100％，而这一般发生在48小时内。

来源：世界卫生组织官方网站

（jerrydoctor）

Avian influenza frequently asked questions

What is avian influenza?

December 18, 2005

Avian influenza, or “bird flu”, is a contagious disease of animals caused by viruses that normally infect only birds and, less commonly, pigs. Avian influenza viruses are highly species-specific, but have, on rare occasions, crossed the species barrier to infect humans.

In domestic poultry, infection with avian influenza viruses causes two main forms of disease, distinguished by low and high extremes of virulence. The so-called “low pathogenic” form commonly causes only mild symptoms (ruffled feathers, a drop in egg production) and may easily go undetected. The highly pathogenic form is far more dramatic. 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.

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