Abstract
A new method is presented for the isolation of purified Echinococcus granulosus antigens from sheep hydatid fluid. Echinococcus granulosus antigens were separated from the host's serum contaminants by absorbing sheep serum proteins with specific immunoabsorbents. No net sensitivity gain was obtained by using these purified antigens rather than crude sheep hydatid fluid in hemagglutination and immunoelectrophoretic tests. The presence of two major antigens (≥ 400,000 and 150,000 MW) was confirmed, the larger component being clearly the most immunoreactive. Evidence of a third slightly antigenic fraction of low molecular weight is presented. The effectiveness of labeled major Echinococcus granulosus antigens in radioimmunoprecipitation test is reported.
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