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  • Title: Failure of anti-Fasciola antisera to induce antibody-dependent, eosinophil-mediated killing of Schistosoma mansoni schistosomula.
    Author: Hillyer GV, Richardson BA, Butterworth AE.
    Journal: J Parasitol; 1987 Aug; 73(4):774-7. PubMed ID: 3114465.
    Abstract:
    Sera from rabbits or humans infected with Fasciola hepatica were tested for their ability to kill Schistosoma mansoni schistosomula in an antibody-dependent, eosinophil-mediated in vitro assay. In addition, anti-F. hepatica antisera raised in rabbits or calves, including one to a Fasciola/Schistosoma cross-reactive, cross-protective defined immunity antigen, were also tested for their killing ability. None of these antisera induced damage to S. mansoni schistosomula in vitro, even when enhanced with mononuclear cell supernatants containing eosinophil-activating factor. Serum from humans with S. mansoni did induce schistosomulum killing in vitro when tested under these same conditions. These results suggest that the mechanism of immunity to schistosomes induced by Fasciola antigens at the level of the schistosomula is mediated by factors other than eosinophils.
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