Ascaris lumbricoides

Plant cells (starch cells) in feces (iodine stain, high power). Parenchymatous plant cells are about the same size as Ascaris lumbricoides eggs. Since they stain brown with iodine, they may he mistaken for eggs by inexperienced microscopists. However, their irregular contour, the often compartmented appearance of the internal contents, and the lack of a recognizable ovum indicate their plant origin.