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乳牛中的禽流感A (H5N1) 病毒:起源,进化和跨物种传播

Ahmed Mostafa^1,2, Mahmoud M Naguib^3,4, Aitor Nogales⁵

¹Department of Disease Intervention and Prevention, Texas Biomedical Research Institute, San Antonio, Texas, USA.

|November 13, 2024

概括

高致病性禽流感病毒 (HPAIV) H5N1类2.3.4.4b已经蔓延到奶牛中,导致疫情爆发并传播给其他哺乳动物和人类. 这种H5N1菌株构成流行病风险,需要一个健康的方法来控制.

科学领域:

兽医病毒学兽医病毒学
动物传播疾病动物传播疾病
流行病学流行病学

背景情况:

高致病性禽流感病毒 (HPAIV) H5N1类2.3.4.4b,最初是H5N8的重新分类,在全球范围内引起了广泛的鸟类疫情.
这种H5N1菌株表现出增强的哺乳动物适应性,扩大其宿主范围超越家禽,包括美国乳牛等反动物.

研究的目的:

讨论HPAIV H5N1 clade 2.3.4.4b在美国乳牛中爆发的流行病学,进化,病原和潜在影响.
突出与这种新型H5N1菌株相关的动物感染潜力和流行病风险.

主要方法:

对禽类和哺乳动物群体中HPAIV H5N1 clade 2.3.4.4b疫情的流行病学数据的审查.
对病毒特征,宿主范围扩张和传播动态的分析.
评估不同物种的病原性,包括牛,其他哺乳动物和人类.

主要成果:

HPAIV H5N1 clade 2.3.4.4b已经成功感染并传播到美国乳牛中,牛奶中的病毒载量很高.
该病毒已被证明是对各种动物物种 (猫,家禽,动物) 的二次传播,特别是对人类 (奶牛场工人) 的二次传播,标志着潜在的哺乳动物对人类H5N1传播.
虽然牛和人类的感染似乎很轻微,但其他受感染的动物发生了严重的疾病和死亡.

结论:

牛H5N1疫情代表了H5N1在与人类相近的家用哺乳动物中显著扩散,增加了进一步适应人与人传播的风险.
紧急的跨学科合作,在一个健康框架内,对于控制正在进行的H5N1疫情和防止进一步的宿主范围和地理扩张至关重要.

关键词:

这是一种H5N1流感.美国的美国.禽类病毒禽类病毒这里是牛群.高致病性禽流感病毒的高度致病性禽流感病毒.

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