09662 IUPAC Gold Book - agglutination inhibition 10.1351/goldbook.09662 09662 current 1 Type of agglutination in which particulate and soluble antigen compete for soluble antibody. Typically, it is soluble antigen in the test medium which reacts first with the soluble antibody, inhibiting the agglutination of indicator particles. With viral hemagglutination inhibition assays, host antibodies resulting from a specific infection are the most common forms of agglutination inhibition assays. In this case, viral-specific antibodies block the sites on the virus that agglutinate erythrocytes. PAC, 2018, 90, 1121. 'Terminology of bioanalytical methods (IUPAC Recommendations 2018)' on page 1135 (https://doi.org/10.1515/pac-2016-1120) https://goldbook.iupac.org/terms/view/09662/html https://goldbook.iupac.org/terms/view/09662/json https://goldbook.iupac.org/terms/view/09662/plain Citation: 'agglutination inhibition' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.09662 The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) for individual terms. If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org . The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using. 2026-06-29T13:18:16+00:00