Cell Cytotoxicity Neutralization Assay

**Semantic type:** Laboratory Procedure

**Definition:** An assay that is used to detect the presence of a toxin in a biological sample by inoculating two sets of tissue cell cultures, one prepared with anti-toxin and one prepared without anti-toxin, with filtrates of the sample and assessing for a cytopathic effect after an incubation period.

**Synonyms:** - CCNA - CCNA - CELL CYTOTOXICITY NEUTRALIZATION ASSAY