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[Enterobius vermicularis]

Adults and eggs of Enterobius vermicularis in tissue sections stained with hematoxylin and eosin (H&E).

A	B

A:  Cross-section of a male E. vermicularis from tissue, stained with H&E.  Notice the presence of the alae (blue arrow), intestine (red arrow) and testis (black arrow).
B:  Cross-section of an adult female E. vermicularis from the same specimen shown in Figure A.  Note the presence of the alae (blue arrow), intestine (green arrow) and ovaries (black arrows).

C	D

C:  Cross section of an adult female E. vermicularis stained with H&E, recovered during a colonoscopy.  Note the prominent alae (blue arrow) and the presence of eggs (yellow arrow). Image contributed by Sheboygan Memorial Hospital, Wisconsin.
D:  Longitudinal section of an adult female E. vermicularis from the same specimen as Figure C.  Note the presence of many eggs.

E	F

E, F:  Eggs of E. vermicularis in a colon biopsy specimen, stained with H&E.