antigenlevel
Antigenlevel is a term used in immunology and clinical diagnostics to denote the amount or concentration of a specific antigen in a biological sample. It is typically quantified using immunoassays such as enzyme-linked immunosorbent assay (ELISA), chemiluminescent immunoassays, or lateral flow assays, and sometimes measured by flow cytometry for cell-surface antigens. Reported values may be expressed in units such as ng/mL, pg/mL, or U/mL, and are interpreted against a standard curve or reference range determined by the assay.
In clinical use, antigenlevel can help assess infection burden, disease activity, or the effectiveness of treatment.
Measurement considerations include sample type and handling, assay specificity, cross-reactivity, and the need for standard curves.