Diagnostic Parasitology

 Enterobius vermicularis
Unlike other intestinal helminths, microsocpic examination of feces is not the most sensitive diagnostic method for Enterobius vermicularis. Gravid females migrate out of the anus, usually at night, to deposit eggs. The eggs can be collected by the 'scotch-tape' technique of touching sticky tape to the perianal area. The ova are oval and flattened on one side. They measure about 25 by 55 µm.

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Copyright 2008 Don Lehman