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Pinworm infection in Child
See also in: Anogenital
Other Resources UpToDate PubMed

Pinworm infection in Child

See also in: Anogenital
Contributors: Mary Spencer MD, Ann Lenane MD, Sireesha Reddy MD, Amy Swerdlin MD, Manasi Kadam Ladrigan MD, Carol Berkowitz MD
Other Resources UpToDate PubMed

Synopsis

Pinworm infection is caused by Enterobius vermicularis, a nematode that affects people of all ages and socioeconomic classes. Humans are the only known host. It is the most prevalent nematode in the United States, and it affects more than 30% of children worldwide. People in crowded living conditions and children are at higher risk for infection. Significant risk factors in developing nations include playing on the floor, nail biting, and not washing hands before eating.

The adult worms live in the host's cecum. From there they migrate to the perineum at night to lay up to 15 000 eggs at one time, which can be viable for up to 2-3 days. The eggs can be spread by their presence on the host's hands, in the bedsheets, or in dust, thus infecting the entire family. Ingested eggs are hatched in the duodenum and migrate to the large intestine, restarting the cycle.

Codes

ICD10CM:
B80 – Enterobiasis

SNOMEDCT:
360419005 – Infection by Enterobius vermicularis

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Diagnostic Pearls

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Differential Diagnosis & Pitfalls

  • Perianal Irritant contact dermatitis and Allergic contact dermatitis from other causes
  • In girls, Vulvovaginal candidiasis or Noninfectious vulvovaginitis
  • In girls, Pelvic inflammatory disease from other causes

Best Tests

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Management Pearls

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Therapy

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References

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Last Updated:07/14/2019
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Patient Information for Pinworm infection in Child
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Pinworm infection in Child
See also in: Anogenital
A medical illustration showing key findings of Pinworm infection (Female symptoms) : Sleep disturbance, Vaginal-labial itching, Anal pruritus, EOS increased
Organism image of Pinworm infection - imageId=1925770. Click to open in gallery.  caption: 'A close-up of adult pinworms.'
A close-up of adult pinworms.
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