Compared with the control group (A, D, G), groups treated with 25 μg/mL (B, E, H) and 50 μg/mL (C, F, I) of T. nucifera showed morphological changes in which encystation from trophozoites to cysts and shrunken and unviable cells were observed. Cell viability was significantly decreased in the T. nucifera treated group and was dose-dependent (J). The scale bar represents 50 μm..</p