相关实验视频

Updated: Jul 27, 2025

Rapid Diagnosis of Avian Influenza Virus in Wild Birds: Use of a Portable rRT-PCR and Freeze-dried Reagents in the Field

Rapid Diagnosis of Avian Influenza Virus in Wild Birds: Use of a Portable rRT-PCR and Freeze-dried Reagents in the Field

Published on: August 2, 2011

禽流感概况 2023年3月至4月

, Cornelia Adlhoch, Alice Fusaro

EFSA journal. European Food Safety Authority

|June 9, 2023

概括

高致病性禽流感 (HPAI) A(H5Nx) 类 2.3.4.4b 欧洲家禽的疫情减少,但野生鸟类的疫情增加,包括危物种. 病毒在美洲扩散,发现了新的哺乳动物感染,对暴露的人类构成低至中等风险.

科学领域:

兽医病毒学兽医病毒学
流行病学流行病学
一个健康,一个健康.

背景情况:

高致病性禽流感 (HPAI) A(H5Nx) 病毒,分类2.3.4.4b,一直在全球传播.
之前在欧洲爆发的疫情显示,家禽和野生鸟类的参与程度很高.
了解当前的流行病学趋势和宿主范围对于风险评估至关重要.

研究的目的:

总结和分析2023年3月至4月期间在欧洲发生的HPAI A ((H5Nx) 病毒爆发情况.
与之前的时期相比,评估疫情发生频率和表现的变化.
评估不断扩大的地理分布和宿主范围,包括哺乳动物感染和人类病例.

主要方法:

在24个欧洲国家的家禽和野生鸟类中报告的HPAI A ((H5Nx) 疫情的回顾性分析.
疫情数据与之前报告期和2022年春季的数据进行比较.
全球对哺乳动物种类和人类感染中HPAI病毒检测情况的审查.

主要成果:

在欧洲报告了106个家禽和610个野生鸟类疫情.
与之前的时期和2022年春季相比,家禽疫情减少,通常呈现不典型的低死亡率.
野生鸟类,特别是黑头海和危物种,仍然受到严重影响. HPAI A ((H5N1) 在美洲扩散,导致新的哺乳动物感染. 在全球范围内报告了两例人类A(H5N1) 和四例其他禽流感人类感染.

结论:

虽然欧洲家禽疫情减少了,但野生鸟类的持续流行病构成了持续的风险,特别是年轻鸟类的分散.
病毒扩散到美洲的新哺乳动物宿主中凸显了其不断演变的宿主热带.
对欧盟/欧洲经济区一般人口的风险仍然很低,但对于职业暴露的个人来说,风险低至中等.

关键词:

在HPAI中使用.禽流感是禽流感的一种疾病.捕获的鸟类捕获的鸟类人类人类人类人类人类人类.监控监控监控监控监控监控禽类禽类禽类禽类野生鸟类.野生鸟类.

更多相关视频

Avian Influenza Surveillance with FTA Cards: Field Methods, Biosafety, and Transportation Issues Solved

Avian Influenza Surveillance with FTA Cards: Field Methods, Biosafety, and Transportation Issues Solved

Published on: August 2, 2011

Influenza Virus Propagation in Embryonated Chicken Eggs

Influenza Virus Propagation in Embryonated Chicken Eggs

Published on: March 19, 2015

相关概念视频

Viral Mutations

Viral Mutations

A mutation is a change in the sequence of bases of DNA or RNA in a genome. Some mutations occur during replication of the genome due to errors made by the polymerase enzymes that replicate DNA or RNA. Unlike DNA polymerase, RNA polymerase is prone to errors because it is not capable of “proofreading” its work. Viruses with RNA-based genomes, like HIV, therefore accrue mutations faster than viruses with DNA-based genomes. Because mutation and recombination provide the raw material...

Vaccinations

Vaccinations

Viral Recombination

Viral Recombination

Cells are sometimes infected by more than one virus at once. When two viruses disassemble to expose their genomes for replication in the same cell, similar regions of their genomes can pair together and exchange sequences in a process called recombination. Alternatively, viruses with segmented genomes can swap segments in a process called reassortment.