Hookworm

Hookworm. Fertile egg in feces (unstained, high power). Hookworm eggs typically have a thin, hyaline shell, are bluntly rounded at the ends, and measure 60 to 75 µm by 36 to 40 µm. They usually are in the four- to eight-cell stage when passed in the feces; the developing ovum tends to fill the shell. In feces, it is not possible to differentiate the eggs of the human hookworms Necator and Ancylostoma.