Immunological differentiation of pathogenic and non-pathogenic isolates of entamoeba histolytica

Entamoeba histolytica can act as a harmless commensal organism in the lumen of the large intestine, or can cause invasive amoebiasis. Some workers have suggested that there are two distinct subspecies of this organism, and that only one of these is associated with invasive disease. Present isoenzyme...

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