Section 17. Infectious Diseases >
Part 8. Parasitic Infections–Nematodes >
Chapter 327. Enterobiasis (Pinworm)Richard A. Oberhelman
Topics Discussed: enterobiasis; enterobius vermicularis; infectious diseases.
Excerpt:"Nocturnal perianal pruritus strongly suggests pinworm infection,
especially in children. Small, creamy-white worms are often found
if the perianal region is examined when the child is awakened by
itching (Fig. 327-1). Ova are not often seen
in the stools, and the cellophane tape swab technique is the diagnostic
method of choice (Fig. 327-2). A 6-cm piece
of transparent (not translucent) cellophane tape is folded with
its sticky side out over the end of a wooden tongue blade and then
firmly applied against either side of the perianal region. Next,
the tape is placed sticky side down on a microscope slide, which
can be examined for pinworm ova. The swabs should be taken 2 to 3
hours after going to bed or in the morning immediately before the
patient gets out of bed. Slides from specimens collected on consecutive
days may be sealed and stored in the refrigerator until delivered.
Neither eosinophilia nor serologic tests are useful for diagnosis...."
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