Enterobious vermicularis is a pin worm. The eggs (60 micrometers x 27 micrometers) are ovoid but asymmetrically flat on one side. After hatching, both sexes of the adult worm are found in the infected intestine. The female worm measures 8 mm x 0.5mm; the male is smaller.
This image © Dr Peter Darben, Queensland University of Technology clinical parasitology collection. Used with permission
You can read more about pinworms here
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