Medical Condition:
Tests, Neutralization
Titration of an antiserum by testing a series of dilutions of virus or immune serum to a given end-point, which is generally the dilution at which tissue cultures inoculated with the serum-virus mixtures demonstrate cytopathology (CPE) or the dilution at which 50% of test animals injected with serum-virus mixtures show infectivity (ID50) or die (LD50).