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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.
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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...
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Updated: May 9, 2025

In Vivo Imaging Systems IVIS Detection of a Neuro-Invasive Encephalitic Virus
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委内瑞拉马脑炎,秘鲁亚马逊,2020年

Marta Piche-Ovares, Maria Paquita García Mendoza, Andres Moreira-Soto

    Emerging infectious diseases
    |April 30, 2025
    PubMed
    概括

    委内瑞拉马脑炎病毒 (VEEV) 在秘鲁亚马逊地区流传. 2020-2021年的一项研究发现,发烧患者的抗体检测率和PCR确认率为3.9%,表明流行性.

    关键词:
    秘鲁 秘鲁 秘鲁 秘鲁 是一个委内瑞拉的马类脑炎.动物与动物之间的关系基因组 基因组是基因组的组成部分.脑膜炎 / 大脑炎血清学 血清学是一门学科.病毒病毒病毒病毒.动物病是动物病.

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    科学领域:

    • * 植物病毒学和分子流行病学.
    • * 传染病监测 传染病监测

    背景情况:

    • *委内瑞拉马脑炎病毒 (VEEV) 是南美洲的一个重大公共卫生问题.
    • *了解VEEV的循环模式对于有效的疾病控制至关重要.

    研究的目的:

    • * 调查秘鲁亚马逊地区发烧患者中VEEV的存在和遗传特征.
    • * 评估VEEV在研究区域的特有性.

    主要方法:

    • *使用血清学和分子学方法 (PCR) 对1972名发烧患者进行VEEV查.
    • *对VEEV基因组的遗传学分析,以确定遗传特征和进化史.

    主要成果:

    • *检测到对VEEV的中和抗体的比例为3.9%.
    • * 两名患者通过PCR检测VEEV的结果呈阳性.
    • *测序VEEV菌株显示97.6%-98.1%的基因组与秘鲁亚型ID菌株相同.

    结论:

    • *这些发现提供了证据,证明VEEV在秘鲁亚马逊地区的流行流行.
    • * 遗传学分析表明,VEEV已经流行了大约54年,有纯化选择的证据.