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Updated: Jul 30, 2026
Particle Agglutination Method for Poliovirus Identification
Published on: April 20, 2011
A nitrocellulose membrane based solid phase enzyme immunoassay for detecting polioviruses in stool
A M Zakir Hussain1, N J Marchette, J F James
1Department of Tropical Medicine and Medical Microbiology, University of Hawaii at Manoa, Honolulu, 96816.
Abstract:
An enzyme immunoassay was developed with nitrocellulose membrane as the solid phase support built in a 96 well porous polystyrene plate. Monoethanolamine was found to be a satisfactory and better blocking agent than skimmed milk. Up to 10(4.28) TCID50 poliovirus particles/0.1 ml of stool collected in 10% skimmed milk could be detected depending on the initial titer of the antigen specific capturing serum/IgG immobilized on nitrocellulose membrane. Percentage of skimmed milk in the transport medium, composition and pH of the dilution buffer and chloroform treatment of the stool specimens before the test were important determinants of the specificity of the test. Polyvinyl affinity membrane did not appear to be superior to nitrocellulose membrane as a solid phase support.
Insights
This study developed a sensitive enzyme immunoassay for poliovirus detection in stool samples. Monoethanolamine proved a superior blocking agent, enhancing detection of poliovirus particles.
Area of Science:
- Virology
- Immunology
- Biotechnology
Background:
- Enzyme immunoassays are crucial for detecting viral pathogens.
- Nitrocellulose membranes offer potential as solid-phase supports in immunoassays.
- Optimizing blocking agents and sample preparation is key for assay sensitivity and specificity.
Purpose of the Study:
- To develop and optimize an enzyme immunoassay for poliovirus detection.
- To evaluate nitrocellulose membrane as a solid-phase support.
- To identify critical factors influencing assay performance, including blocking agents and sample treatment.
Main Methods:
- Development of a 96-well enzyme immunoassay using nitrocellulose membrane.
- Comparison of monoethanolamine and skimmed milk as blocking agents.
- Assessment of stool specimen collection medium (skimmed milk percentage), dilution buffer composition/pH, and chloroform treatment.
- Evaluation of polyvinyl affinity membrane versus nitrocellulose membrane.
Main Results:
- The developed immunoassay detected up to 10(4.28) TCID50 poliovirus particles/0.1 ml of stool.
- Monoethanolamine demonstrated superior performance as a blocking agent compared to skimmed milk.
- Key factors influencing specificity included skimmed milk concentration, buffer properties, and pre-treatment of stool specimens.
- Nitrocellulose membrane performed comparably to polyvinyl affinity membrane.
Conclusions:
- An effective enzyme immunoassay for poliovirus detection in stool was established using nitrocellulose membrane.
- Monoethanolamine is a recommended blocking agent for this assay, outperforming skimmed milk.
- Careful optimization of sample collection and processing is essential for reliable poliovirus detection.
