Cultures of 85 stocks of Entamoeba histolytica were compared by electrophoretic patterns of three enzymes: glucosephosphate isomerase, phosphoglucomutase and L-malate: NADP+ oxidoreductase (oxaloacetate-decarboxylating). Four groups of E. histolytica stocks have been distinguished. 18 of these stocks were derived from individual patients with clinical amoebiasis and all of these were of one enzyme group, which did not occur among the other stocks.
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Sargeaunt et al. (1978) studied this question.
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