Abstract
In an attempt to prove the specificity of the crude Taenia saginata antigen for the immunodiagnosis of bovine cysticercosis, a major and highly immunogenic fraction (F10), responsible for the formation of the typical "long band" reaction in immunoelectrophoresis, has been isolated from T. saginata proglottides by immunoaffinity chromatography. The immunoabsorbent was prepared by coupling a specifically raised hyperimmune serum (HIS) anti-F10 to Sepharose 4B. The purity of the isolated F10 was demonstrated by immunoprecipitation reactions. The HIS anti-F10, however, cross-reacted with several larval and adult Taenia spp. Consequently, F10 showed cross-reactions with the sera of animals infected with hydatid cysts or larval T. hydatigena. F10 also reacted with HIS anti-F5 (Echinococcus granulosus) but was shown to be non-identical with the well known F5 of E. granulosus. These data prove that F10 of T. saginata was not species-specific but showed a group specificity for the taeniid family - a situation analogous to F5 of E. granulosus.
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