Abstract
The use of protective monoclonal antibodies has enabled us to demonstrate antigenic community between a 38‐kDa schistosomula surface molecule and a 115‐kDa component derived from adult worms. Injection of adult worms in rats also led to the production of antibodies specific for the 38‐kDa antigen, suggesting that the 115‐kDa adult worm molecule could act as an inducer of the protective immune response raised against young invading parasites.