相关实验视频

Updated: Jun 10, 2025

Nasal Wipes for Influenza A Virus Detection and Isolation from Swine

Nasal Wipes for Influenza A Virus Detection and Isolation from Swine

Published on: December 4, 2015

热门话题: 流感A H5N1病毒表现出广泛的宿主范围,包括奶牛

Salman L Butt¹, Mohammed Nooruzzaman¹, Lina M Covaleda¹

¹Department of Population Medicine and Diagnostic Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853.

JDS communications

|October 21, 2024

概括

高致病性禽流感 (HPAI) H5N1在奶牛中有效地传播,导致乳腺炎和减少牛奶产量. 这标志着HPAI H5N1在哺乳动物物种中首次持续传播.

科学领域:

兽医病毒学兽医病毒学
传染性疾病传染性疾病
动物健康动物健康

背景情况:

高致病性禽流感 (HPAI) H5N1类2.3.4.4b自2021年以来在北美野生鸟类中广泛传播.
这导致家禽的疫情爆发,造成严重的经济损失.
重组事件产生了新的HPAI H5N1基因型,并扩散到各种哺乳动物宿主中.

研究的目的:

为了提供当前HPAI H5N1泛动物病毒的概述.
讨论病毒的宿主范围,重点关注其最近在乳牛中出现的情况.
审查目前对牛宿主HPAI H5N1病原学的知识.

主要方法:

对HPAI H5N1.1现有文献和监测数据的审查.
分析病毒基因型和宿主特异性热带性.
在牛模型中进行致病性研究.

主要成果:

在乳牛中有效传播的HPAI H5N1基因型B3.13,代表了第一个持续的哺乳动物传播.
感染的目标是乳腺细胞,导致牛奶中的高病毒载量和严重的乳腺炎.
临床症状包括牛奶质量变化和牛奶产量下降.

结论:

由于其适应能力和在牛等哺乳动物物种中持续传播,HPAI H5N1泛动物病毒构成了重大威胁.
了解牛群中HPAI H5N1病原体对于疾病控制和缓解策略至关重要.
持续的监测和研究是必要的,以监测病毒的进化和宿主适应.

更多相关视频

Influenza A Virus Studies in a Mouse Model of Infection

Influenza A Virus Studies in a Mouse Model of Infection

Published on: September 7, 2017

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

相关概念视频

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.

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...