Outre sa teneur en unités internationales agglutinantes, 1 millilitre de ce sérum bovin lyophilisé doit contenir 1 000 unités sensibilisatrices assurant la fixation du complément.
In addition to its content in international agglutinating units, 1 millilitre of this lyophilised bovine serum must contain 1000 sensitising units which fix the complement.