Thread worms

A small white, thin worm about 1/4 inch in length that infects the intestinal tract. The main symptom is usually rectal itching, especially intense at night.

TIPS 

  • They may be seen with the naked eye and are best seen at night or early in the morning in the rectal area.
  • To diagnose thread worms look with a flashlight in the rectal area a few hours after your child goes to bed or in the early morning.
  • You should see the 1/4 inch thread-like worms moving.
  • Occasionally they are seen with the bowel movement.
  • They come out at night to lay eggs in the rectal area.
  • They are extremely common in childhood and are usually contacted from other children.
  • They become infected when they ingest the thread worm eggs.
  • The swallowed egg matures to the adult thread worm after 3 to 4 weeks.
  • This infection does not reflect uncleanliness or poor hygiene and frequently does recur.
  • They are harmless and do not typically cause abdominal pain or diarrhea.  
  • Occasionally, if the child is heavily infected, abdominal pain may be a problem.
  • A laboratory exam may be done if the diagnosis is uncertain

Treatment of thread worms

  • Call your doctor during office hours (it is not really a night time emergency) if you have identified the thread worms for medication.
  • Discuss if other family members need treatment also.
  • Alert your physician if anyone in the family is pregnant.

Prevention of thread worms

  • To prevent reinfection with thread worms, have the child use good handwashing techniques before meals.
  • Vacuum your child's room once a week because any eggs on the floor are infectious for 1 to 2 weeks.
  • Machine wash bedding and clothing will kill any eggs.
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