Scholarlink

<p>To clarify the etiological and genetic evolutionary characteristics of an acute gastroenteritis cluster outbreak caused by sapovirus in Nanchang, Jiangxi, China. A total of 10 anal swab samples were collected from student and teacher cases during a gastroenteritis outbreak at a primary school in Nanchang, Jiangxi Province, in November 2024. Real-time fluorescent RT-PCR was used for routine gene detection of diarrhea viruses. For the sapovirus nucleic acid-positive samples, traditional RT-PCR was used for amplification, sequence determination, splicing, and genetic relationship analysis. We also conducted whole-genome sequencing on sapovirus to analyze the amino acid variations. This outbreak was caused by contact transmission. Real-time fluorescent reverse transcription polymerase chain reaction detection confirmed that 5 samples were positive for sapovirus nucleic acid, and the capsid protein gene VP1 fragments were successfully amplified. Genetic relationship analysis inferred from the phylogenetic tree revealed that the molecular type of sapovirus was the GI.6 genotype, with 100% homology among the 5 sequences. The nucleotide homology between the sequences in this study and the sapovirus GI.6 reference sequence ranged from 97.07% to 99.12%, and the amino acid homology ranged from 96.49% to 97.37%. Amino acid variation site analysis revealed that there were 4 amino acid site substitutions between them. Compared with VP1 ,the closest distance of nucleotide homology was 99.12% from Zhejiang, China, in 2023 (OR351089). Through amino acid comparison of the whole-genome sequence, we found that the similarity of sapovirus in Jiangxi Province to other reference strains in ORF1 ranged from 99.21% to 99.25%, and the similarity in ORF2 ranged from 86.8% to 88%. The causative agent of this outbreak was identified as sapovirus GI.6, a genotype rarely reported in Jiangxi. In the future, further research on the molecular epidemiology of sapovirus with more gene sites that may mutate should be strengthened.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Epidemiological and genetic characteristics of a sapovirus GI.6 acute gastroenteritis outbreak in Jiangxi, China

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年6月23日

查看全文
  • Qian Wang,
  • Jun Zhou,
  • Shiwen Liu,
  • Yanni Zhang,
  • Hailong Liu,
  • Xiaoqing Liu,
  • Yong Shi,
  • Fang Xiao,
  • Yangbowen Wu,
  • Dajin Xiao,
  • Yuan xie,
  • Gang Xu,
  • Jiabo Du,
  • Shuting Wei,
  • Jianxiong Li

摘要

To clarify the etiological and genetic evolutionary characteristics of an acute gastroenteritis cluster outbreak caused by sapovirus in Nanchang, Jiangxi, China. A total of 10 anal swab samples were collected from student and teacher cases during a gastroenteritis outbreak at a primary school in Nanchang, Jiangxi Province, in November 2024. Real-time fluorescent RT-PCR was used for routine gene detection of diarrhea viruses. For the sapovirus nucleic acid-positive samples, traditional RT-PCR was used for amplification, sequence determination, splicing, and genetic relationship analysis. We also conducted whole-genome sequencing on sapovirus to analyze the amino acid variations. This outbreak was caused by contact transmission. Real-time fluorescent reverse transcription polymerase chain reaction detection confirmed that 5 samples were positive for sapovirus nucleic acid, and the capsid protein gene VP1 fragments were successfully amplified. Genetic relationship analysis inferred from the phylogenetic tree revealed that the molecular type of sapovirus was the GI.6 genotype, with 100% homology among the 5 sequences. The nucleotide homology between the sequences in this study and the sapovirus GI.6 reference sequence ranged from 97.07% to 99.12%, and the amino acid homology ranged from 96.49% to 97.37%. Amino acid variation site analysis revealed that there were 4 amino acid site substitutions between them. Compared with VP1 ,the closest distance of nucleotide homology was 99.12% from Zhejiang, China, in 2023 (OR351089). Through amino acid comparison of the whole-genome sequence, we found that the similarity of sapovirus in Jiangxi Province to other reference strains in ORF1 ranged from 99.21% to 99.25%, and the similarity in ORF2 ranged from 86.8% to 88%. The causative agent of this outbreak was identified as sapovirus GI.6, a genotype rarely reported in Jiangxi. In the future, further research on the molecular epidemiology of sapovirus with more gene sites that may mutate should be strengthened.