Related Experiment Videos
Genetic classification of "Sapporo-like viruses"
I Schuffenecker1, T Ando, D Thouvenot
1Laboratoire de Virologie, Centre National de Reference pour les Enterovirus, Universite Claude Bernard Lyon I, Lyon, France. i.schuffenecker@free.fr
Archives of Virology
|January 5, 2002
Summary
Sapporo-like viruses (SLVs) and Norwalk-like viruses (NLVs) cause acute gastroenteritis. This study genetically classifies SLVs into three genogroups, enabling uniform classification with NLVs.
Area of Science:
- Virology
- Molecular Biology
- Public Health
Background:
- Sapporo-like viruses (SLVs) and Norwalk-like viruses (NLVs) are significant human pathogens responsible for acute gastroenteritis.
- While NLVs are well-classified into three genetic groups and 17 subgroups, a comparable genetic classification for SLVs is lacking.
Purpose of the Study:
- To establish a uniform genetic classification system for both SLVs and NLVs.
- To genetically classify SLV strains based on sequence analysis.
Main Methods:
- Sequence analysis of capsid gene, RNA polymerase gene, 3' open reading frame (3'ORF), overlapping ORF, and 3' untranslated region (3'UTR).
- Distance and phylogenetic analyses were performed on newly detected and published SLV and NLV strains.
- Comparative analysis across multiple genomic regions to determine genogroup-specific markers.
Main Results:
- A uniform classification of SLVs and NLVs is achievable using entire capsid sequences.
- Eleven SLV strains were genetically classified into three major genogroups (I, II, and III), comprising five genetic subgroups.
- Genogroup-specific sequence variations were identified, particularly at the junction between the RNA polymerase and capsid genes.
Conclusions:
- The study successfully established a genetic classification for SLVs, aligning them with NLV classification.
- This uniform classification framework aids in understanding the genetic diversity and epidemiology of caliciviruses causing gastroenteritis.
- Specific genomic regions, like the RNA polymerase-capsid gene junction, can serve as markers for genogroup identification.