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Localization of the target 27-kDa Fasciola antigen within an F. gigantica adult worm by using specific rabbit antisera and indirect immunoperoxidase staining. (A) Section of an F. gigantica adult worm showing a positive immunoperoxidase reaction (red color within tegument [t], muscularis [ms], and gut cells [g]) (×100). (B) Section of an F. gigantica adult worm showing no immunoperoxidase reaction (×100).
