新血统GII.4的进化和动态,也没有在亚马逊地区流通的病毒
Jonaia Novaes da Costa1, Jones Anderson Monteiro Siqueira1, Dielle Monteiro Teixeira1
1Virology Section, Instituto Evandro Chagas, Ananindeua, Pará 67030-000, Brazil.
概括
巴西的诺罗病毒GII.4进化显示出快速的遗传变化和GII.4旧金山变种的出现. 持续的基因组监测对于追踪新型诺罗病毒菌株和为公共卫生战略提供信息至关重要.
科学领域:
- 病毒学 病毒学
- 分子流行病学分子流行病学
- 公共卫生 公共卫生
背景情况:
- 诺罗病毒GII.4是全球胃肠炎爆发的主要原因.
- 了解区域进化动态对于有效的疾病控制至关重要.
- 亚马逊地区对于病毒监测具有独特的流行病学特征.
研究的目的:
- 在巴西亚马逊地区调查诺罗病毒GII.4的进化途径.
- 为了识别新出现的诺罗病毒变种,包括GII.4旧金山.
- 分析流通性诺罗病毒的遗传多样性和进化速率.
主要方法:
- 分子描述性研究分析了615个便样本 (2023年11月 - 2024年12月).
- 诺罗病毒的流行率和基因型的特征使用遗传学重建.
- 贝叶斯推理在BEAST中用于分子时钟和替代率分析.
主要成果:
- 诺罗病毒的流行率为14.5%,检测到不同的基因型 (GII.4,GII.17,GII.8,GII.6,GII.10,GII.7).
- 巴西GII.4菌株与全球基因系密切相关,替代率高 (2.28 × 10−4个子基因/基因地/年).
- 旧金山GII.4变种在巴西首次被发现;GII.P16和GII.10之间的再组合被确定.
结论:
- 亚马逊地区的诺罗病毒具有显著的遗传多样性和持续演变.
- 旧金山GII.4的出现强调了快速检测变种的必要性.
- 针对诺罗病毒的公共卫生干预,持续的基因组监测至关重要.
更多相关视频
07:02Quantifying Human Norovirus Virus-like Particles Binding to Commensal Bacteria Using Flow Cytometry
Published on: April 29, 2020
8.4K
09:50Single Cell Micro-aspiration as an Alternative Strategy to Fluorescence-activated Cell Sorting for Giant Virus Mixture Separation
Published on: October 27, 2019
7.5K
相关概念视频
01:27Diversity of Protists IV
757
Amoebozoa represent a diverse group of terrestrial and aquatic protists that utilize lobe-shaped pseudopodia for locomotion and feeding. This characteristic differentiates them from the Rhizaria, which possess threadlike pseudopodia. The primary classifications within Amoebozoa include gymnamoebas, entamoebas, and the plasmodial and cellular slime molds. Phylogenetic evidence indicates that Amoebozoa diverged from a lineage that ultimately gave rise to fungi and animals.Gymnamoebas and...
757
01:29Viruses with RNA Genomes
840
RNA viruses are categorized into positive-strand, negative-strand, or double-stranded groups based on their genomic structure and replication mechanisms. This classification dictates how they exploit host cellular machinery for protein synthesis and replication. Some RNA viruses also utilize reverse transcription as part of their life cycle, further diversifying their replication strategies.Positive-Strand RNA VirusesPositive-strand RNA viruses have genomes that function directly as messenger...
840
02:54Evolutionary Relationships through Genome Comparisons
6.9K
Genome comparison is one of the excellent ways to interpret the evolutionary relationships between organisms. The basic principle of genome comparison is that if two species share a common feature, it is likely encoded by the DNA sequence conserved between both species. The advent of genome sequencing technologies in the late 20th century enabled scientists to understand the concept of conservation of domains between species and helped them to deduce evolutionary relationships across diverse...
6.9K
03:21Genome Size and the Evolution of New Genes
3.3K
3.3K
03:21Genome Size and the Evolution of New Genes
9.0K
While every living organism has a genome of some kind (be it RNA, or DNA), there is considerable variation in the sizes of these blueprints. One major factor that impacts genome size is whether the organism is prokaryotic or eukaryotic. In prokaryotes, the genome contains little to no non-coding sequence, such that genes are tightly clustered in groups or operons sequentially along the chromosome. Conversely, the genes in eukaryotes are punctuated by long stretches of non-coding sequence.
9.0K
01:27Horizontal Gene Transfer
1.5K
Horizontal gene transfer (HGT) is a process where genetic material moves between organisms within the same generation, unlike vertical gene transfer, which occurs from parent to offspring. HGT plays a crucial role in microbial evolution, adaptation, and survival, particularly in shared environments like the human gut.Mobile genetic elements such as plasmids, prophages, integrons, insertion sequences, and transposons facilitate this process. HGT occurs through three primary mechanisms:...
1.5K