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Abstract Isoenzyme analysis by starch-gel electrophoresis has proved to be a useful method for the biochemical differentiation of pathogenic Entamoeba histolytica and non-pathogenic E. dispar isolates. Of the 24 known zymodemes, 3 are laboratory-made and have not previously been identified in humans. Parasitology screening was carried out in a psychiatric institution. Two amebic stocks were isolated...
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