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Abstract
The immunoprecipitin response of mice infected with Schistosoma mansoni and treated with nicarbazin, an egg suppressive agent, is significantly lower than in untreated-infected mice. The precipitin response to cercarial extract is virtually abolished in treated mice indicating common antigenic determinants with eggs of the same species. Haemagglutinins to adult worms are also significantly diminished in treated mice. Finally, circumoval precipitins are absent in treated mice when the drug is given continuously to infected mice in order to prevent egg laying by the female adult parasite. The results suggest that a significant portion of the precipitating antibody produced in schistosome infections reactive with cercariae and adult worms, as well as eggs, is probably a secondary antibody response due to common antigenic determinants found in eggs.
Published Version
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