An association between schistosomes and contrapsin, a mouse serine protease inhibitor (serpin)

Abstract
SUMMARY: An antigen in homogenates of adultSchistosoma mansoniworms grown in mice, and immunoprecipitated by polyspecific rabbit antiserum, has been identified as contrapsin, a mouse serine protease inhibitor (serpin). In the serum of some mice infected withS. mansonicontrapsin was found with altered immunoelectrophoretic characteristics when compared with contrapsin from uninfected mice.