Hydatidosis: a first approach for serological standardization.

: Hydatid fluids were collected in three continents and used as antigens against both human E. granulosus and E. multilocularis hydatidosis-positive sera collected in the same countries, in ELISA. The sensitivity of the antigens was good for all sera examined and this confirms the existence of common antigens, which is particularly marked in the 0.8M fraction of Italian hydatid fluid.