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Based on current data we propose that the uninucleated-cyst-producing Entamoeba infecting 36 humans is called Entamoeba polecki and divided into four subtypes (ST1-ST4) and that 37Entamoeba coli is divided into two subtypes (ST1-ST2). New hosts for several species were 38 detected and while host specificity and genetic diversity of several species remain to be 39 clarified, it is clear that previous reliance on cultivated material has given us a misleading and 40 incomplete picture of variation within the genus Entamoeba.

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