50 Percent Embryo Infective Dose

**Semantic type:** Quantitative Concept

**Definition:** Amount of infectious agent or biological product that causes infection in the 50% of embryos such as chicken embryos used in the product potency assay or pathogen activity assay.

**Synonyms:** - 50% Embryo Infective Dose - 50% embryo infectious dose - 50% embryo infective dose - EID50 - EID50 - [EID_50]