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Natural genetic recombination between co-circulating heterotypic enteroviruses
Gabriela Oprisan1, Mariana Combiescu1, Sophie Guillot2
1Cantacuzino Institute, Splaiul Independentei 103, Bucharest, R-70.100 Romania1.
The Journal of General Virology
|August 20, 2002
Summary
Genetic recombination occurs in echoviruses, not just poliovirus. Studies show evidence of genome recombination in echovirus serotypes 7 and 30 during aseptic meningitis outbreaks.
Area of Science:
- Virology
- Molecular Biology
- Genetics
Background:
- Poliovirus frequently undergoes natural genetic recombination when multiple genotypes infect a single host.
- The potential for recombination in other enteroviruses, such as echoviruses, remains less understood.
Purpose of the Study:
- To investigate whether echoviruses can naturally produce viable recombinant genomes.
- To analyze molecular features of epidemic echovirus strains during an aseptic meningitis outbreak.
Main Methods:
- Sequencing of VP1 and 3D polymerase coding regions from nine epidemic echovirus strains (E4, E7, E30).
- Phylogenetic analysis comparing epidemic strains to prototype and field strains.
- Generation of phylogenetic trees to visualize genetic relationships.
Main Results:
- In the VP1 region, epidemic strains clustered with their homotypic prototypes.
- In the 3D polymerase region, echovirus 7 and echovirus 30 strains formed a distinct cluster, separate from their prototypes.
- This suggests recombination or common ancestry for the 3D polymerase region in E7 and E30.
Conclusions:
- Genetic recombination between different echovirus serotypes is possible when multiple strains co-circulate.
- Findings indicate that echoviruses can generate viable recombinant genomes, similar to poliovirus.