This effect is only produced when two substances are present, the amboceptor or immune body and the complement.
Therefore it is difficult to standardize the serum to get a proper amount of amboceptor for the complement present.
The pathologist would probably object to this interpretation since no amboceptor is needed for agglutination.
Designated by other writers by various synonyms: preventive, or sensibilising substance, immunising body, amboceptor.
amboceptor am·bo·cep·tor (ām'bō-sěp'tər)
The anti-sheep red blood cell antibody used in complement-fixation tests.