Techniques for locating isotopically labelled schistosomula of Schistosoma mansoni in host tissues for ultrastructural investigations

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Abstract
The use of 75Selenomethionine labelled cercariae of Schistosoma mansoni for ultrastructural localization of parasites in host tissues has been evaluated. Both gamma counting of tissue, and autoradiography of resin-embedded tissue were successful. The autoradiographic technique was more sensitive and schistosomula were readily located in pulmonary tissue up to 24 days post-infection.