Pinworm

Background

Two pinworms next to a ruler: The markings are 1 mm apart.

Enterobius vermicularis

Clinical Features

  • Nocturnal perianal itch
  • Sometimes vulvovaginitis and dysuria in young females

Differential Diagnosis

Helminth infections

Cestodes (Tapeworms)

Trematodes (Flukes)

Nematodes (Roundworms)

Evaluation

  • Cellophane tape test to be followed up as outpatient
  • Tape contents need to be spread on slide, viewed under microscope in toluene

Management

Treatment targeted against Enterobius vermicularis

  • Mebendazole 100mg PO once THEN repeat in 2 weeks OR
  • Albendazole 400mg PO once (100mig if < 2yo) THEN repeat in 2 weeks OR
  • Pyrantel Pamoate (Pin-x) 11mg/kg (max 1g) THEN repeat in 2 weeks
    • Recommended for pregnant patients

Consider treatment for the household.

Disposition

Discharge with oral treatment

See Also

External Links

References

  • Kost,S.: Pinworms In Fleisher and Ludwig's 5-Min Pediatric Emergency Consult, Lippincot WIlliams & Wilkins, Pages 748-749
  • Elliot, D: Feldman: Sleisenger and Fordtran's Gastrointestinal and Liver Disease, 9th ed., Saunders, 2010, (Ch)110 p:1928