Log10 50 Percent Tissue Culture Infective Dose

**Semantic type:** Quantitative Concept

**Definition:** A potency unit for measuring infectious activity of a biologic product or infectious agent preparation equal to a base-10 logarithm of amount of product or agent preparation that causes infection in the 50% of the tissue culture-containing flasks inoculated with that dilution of infectious material in the product potency assay or pathogen activity assay.

**Synonyms:** - Log10 50% Tissue Culture Infective Dose - lg TCID50 - log10 TCID 50 - log10 TCID50 - log10 TCID50 - log10 tissue culture infective dose 50 - {log10}.[TCID_50] - {log10}.[TCID_50]