Immune responses to parasitic infection include:

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Immune responses (effectors)to parasitic infections include immunoglobulins;complement;antibody-dependent,cell-mediated cytotoxicity;and cellular defenses such as eosinophils and T cells.Activation of the classic and alternate complement pathways may occur in some cases of schistosomiasis,and the alternate pathway of activation may kill larvae in the absence of antibody.
The role of eosinophils is complex.They may phagocytize immune complexes and act as effector cells in mediating local (type I)reactions,primarily in tissue stage parasites.T cells are frequently involved in body defenses against parasites.Sequestration of microorganisms is a classic T cell-dependent hypersensitivity response.In addition,helper T cells may sensitize B cells to specific parasitic antigens.

Immune Responses to Parasitic Infection Include