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Updated: Apr 21, 2026
Particle Agglutination Method for Poliovirus Identification
Published on: April 20, 2011
Development of an efficient entire-capsid-coding-region amplification method for direct detection of poliovirus from
Minetaro Arita1, David R Kilpatrick2, Tomofumi Nakamura3
1Department of Virology II, National Institute of Infectious Diseases, Tokyo, Japan minetaro@nih.go.jp.
Abstract:
Laboratory diagnosis has played a critical role in the Global Polio Eradication Initiative since 1988, by isolating and identifying poliovirus (PV) from stool specimens by using cell culture as a highly sensitive system to detect PV. In the present study, we aimed to develop a molecular method to detect PV directly from stool extracts, with a high efficiency comparable to that of cell culture. We developed a method to efficiently amplify the entire capsid coding region of human enteroviruses (EVs) including PV. cDNAs of the entire capsid coding region (3.9 kb) were obtained from as few as 50 copies of PV genomes. PV was detected from the cDNAs with an improved PV-specific real-time reverse transcription-PCR system and nucleotide sequence analysis of the VP1 coding region. For assay validation, we analyzed 84 stool extracts that were positive for PV in cell culture and detected PV genomes from 100% of the extracts (84/84 samples) with this method in combination with a PV-specific extraction method. PV could be detected in 2/4 stool extract samples that were negative for PV in cell culture. In PV-positive samples, EV species C viruses were also detected with high frequency (27% [23/86 samples]). This method would be useful for direct detection of PV from stool extracts without using cell culture.
Insights
A new molecular method detects poliovirus (PV) directly from stool, offering high efficiency without cell culture. This advancement aids the Global Polio Eradication Initiative by improving PV diagnosis from patient samples.
Area of Science:
- Virology
- Molecular Biology
- Public Health
Background:
- Laboratory diagnosis is crucial for the Global Polio Eradication Initiative.
- Cell culture has been the standard for poliovirus (PV) detection in stool specimens.
- A highly sensitive and efficient method for direct PV detection from stool is needed.
Purpose of the Study:
- To develop a molecular method for direct PV detection from stool extracts.
- To achieve detection efficiency comparable to cell culture.
- To improve PV diagnosis for polio eradication efforts.
Main Methods:
- Developed a method to amplify the entire capsid coding region of human enteroviruses (EVs), including PV.
- Utilized an improved PV-specific real-time reverse transcription-PCR system.
- Performed nucleotide sequence analysis of the VP1 coding region for confirmation.
Main Results:
- Successfully detected PV genomes from as few as 50 PV copies.
- Achieved 100% detection rate (84/84) in cell culture-positive stool extracts.
- Identified PV in 2/4 stool samples negative by cell culture, and detected EV species C viruses in 27% of samples.
Conclusions:
- The developed molecular method enables efficient and direct detection of PV from stool extracts.
- This method offers an alternative to traditional cell culture, potentially enhancing polio surveillance.
- The assay's sensitivity and specificity support its utility in global polio eradication programs.
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