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Evaluation of seroneutralization and molecular diagnostic methods for echovirus identification
Christine Kottaridi1, Eugenia Bolanaki, Nikolaos Siafakas
1Department of Biochemistry and Biotechnology, School of Health Sciences, University of Thessaly, 412 21 Larissa, Greece.
Diagnostic Microbiology and Infectious Disease
|September 20, 2005
Summary
This study compared echovirus identification using RIVM pools and reverse transcription-polymerase chain reaction (PCR) assays. PCR methods targeting the VP1 gene effectively correlated echovirus serotype and genotype for molecular typing.
Area of Science:
- Virology
- Molecular Biology
- Public Health
Background:
- Echoviruses are a significant public health concern, necessitating accurate and efficient identification methods.
- Current identification techniques can be labor-intensive and may lack the discriminatory power for detailed molecular epidemiology.
Purpose of the Study:
- To compare the efficacy of RIVM pools and reverse transcription-polymerase chain reaction (RT-PCR) assays for identifying echovirus clinical isolates.
- To evaluate the utility of targeting specific regions of the VP1 gene for molecular typing and phylogenetic analysis of echoviruses.
Main Methods:
- Comparative analysis of 41 echovirus clinical isolates using RIVM pools and RT-PCR.
- Amplification of a 433-bp segment in the 5' untranslated region using primer pair UG52-UC53.
- Subgrouping of isolates using restriction enzyme HpaII.
- PCR amplification of a 315-bp fragment at the 5' end of the VP1 gene and a 1452-bp fragment including the VP1 3' end and adjacent coding regions.
- Phylogenetic analysis based on nucleotide sequences of the 5' and 3' ends of the VP1 gene.
Main Results:
- RT-PCR assays successfully amplified target regions in the echovirus genome.
- Restriction enzyme digestion and phylogenetic analysis revealed two distinct genetic clusters among the isolates.
- Phylogenetic grouping based on VP1 gene sequences showed a strong correlation between echovirus serotype and genotype.
- Both the 5' and 3' ends of the VP1 gene provided valuable information for molecular typing.
Conclusions:
- RT-PCR assays, particularly targeting the VP1 gene, are effective tools for the molecular identification and typing of echoviruses.
- The observed correlation between serotype and genotype suggests that VP1 gene sequencing can be reliably used for molecular epidemiology and strain differentiation.
- These findings support the integration of molecular methods for enhanced echovirus surveillance and diagnostics.