National Cancer Institute (source definition)
Radial Immunodiffusion
A quantitative technique used to detect and estimate the concentration of an antigen by measuring the diameter of the ring of precipitation (precipitin ring), which is formed as a result of the interaction of the antigen and an antibody at optimal concentration.
Review and references
Automated source check (NCI definition)
2026-10-19
2026-10-19
professional use
References
- NCI Thesaurus 26.09d — Radial Immunodiffusion (C119296)
- Source: National Cancer Institute, NCI Thesaurus 26.09d, C119296. NCI definition, reproduced without modification under CC BY 4.0.
- Evaluation of a lateral flow immunoassay for the quantitative measurement of immunoglobulin G in foals compared with radial immunodiffusion. — J Vet Intern Med, 2026-09-01 (PMID 42765740; literature)
- Single Radial Immunodiffusion (SRID) Assay for Quantitative Determination of Recombinant SOD Protein in a Brucellosis Vaccine Candidate: Method Development and Validation. — Methods Protoc, 2026-07-28 (PMID 42646508; literature)
- Corrigendum to 'Comparison of the radial immunodiffusion test and a novel lateral flow device test for measuring immunoglobulin concentrations in calf blood' [The Veterinary Journal (2025)106456]. — Vet J, 2026-07-23 (PMID 42493322; literature)
- Bromelain-cleaved hemagglutinin production from cell culture-derived influenza viruses enhances vaccine potency quantification by single radial immunodiffusion assay. — Vaccine, 2026-01-16 (PMID 41547112; literature)
What it is
A quantitative technique used to detect and estimate the concentration of an antigen by measuring the diameter of the ring of precipitation (precipitin ring), which is formed as a result of the interaction of the antigen and an antibody at optimal concentration.
Source: National Cancer Institute, NCI Thesaurus 26.09d, C119296. NCI definition, reproduced without modification under CC BY 4.0.
Source identity and definition checked automatically on 2026-10-18. No individual clinical interpretation or human reviewer is asserted.
Compliance note
Reference intervals and interpretation depend on the laboratory, specimen, method and clinical context. This source definition is educational information; it does not establish a diagnosis, product approval or suitability for an individual.
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