Pinworms, also known as Enterobius vermicularis
, are tiny parasitic worms that commonly infect children. They spread easily, particularly in environments like schools and daycare centers.
While the thought of a pinworm infection may be alarming for parents, it's important to know that it's both common and highly treatable. Because it is easy to become infected and re-infected, dealing with a pinworm infection can be frustrating. Remember that it's a common issue among children and is very treatable. By following the treatments and prevention measures noted below, you can help your child recover quickly and prevent spread in the home.
What Are Pinworms?
Pinworms are small, white, thread-like worms that live in the intestines. Female pinworms lay eggs around the anal area, usually at night, which causes itching.
How Do You Get Infected With Pinworms?
Pinworm infections are transmitted when an infected person scratches the affected area, allowing the eggs to transfer to surfaces or other people. This usually happens at night, as female pinworms exit the intestines through the anus and lay their eggs on the surrounding skin. The eggs cause itching, which leads to scratching, particularly during sleep, making nighttime scratching of the buttocks a common symptom.
Once pinworm eggs are laid, they become infectious within 2–3 hours. If these eggs are accidentally ingested, they can infect others. This is why it's crucial for anyone suspected of having pinworms to wash their hands immediately upon waking and ensure that sheets and clothing are properly cleaned.
How Pinworms Spread
Pinworm eggs can easily infect others, especially caretakers or close contacts of an infected person. Here’s how they spread:
- Hand-to-mouth contact: After scratching or touching the anal area, eggs can get under the fingernails and be ingested if the fingers come into contact with the mouth.
- Surface contamination: Pinworm eggs can transfer to diapers, clothing, bedding, food, or other objects. If someone touches these items and then touches their mouth without proper handwashing, they can ingest the eggs. Eggs can survive on surfaces for 2–3 weeks.
- Inhalation (rare): Pinworm eggs are tiny and may become airborne. In rare cases, they can be inhaled and then swallowed.
Symptoms of Pinworm Infection
Pinworm infections are typically mild and can go unnoticed. However, the most common symptom is itching around the anus, especially at night. Other signs and symptoms may include:
- Restlessness and difficulty sleeping
- Irritability or discomfort
- Abdominal pain or nausea (in severe cases)
- Visible worms in the stool or around the anal area (though they are very small and not always easily seen)
How Are Pinworms Diagnosed?
The most common method to diagnose pinworms is the tape test, which is simple and can be done at home*:
- Press a piece of clear tape on the skin around the anus early in the morning, before bathing or using the bathroom. The tape collects any pinworm eggs present on the skin.
- Perform this test for 3 consecutive mornings if no eggs are found initially.
- Alternatively, pinworms may be visible on the skin near the anus or on clothing and bedding 2–3 hours after the child falls asleep.
* Whenever conducting these procedures or helping with toileting or diaper changes, be sure to wash your hands thoroughly after touching the anal area.
Treatment and Prevention in a Household
Pinworm infections are easily treatable with medications, but it’s essential to treat the entire household due to the highly contagious nature of pinworms.
Medications:
- Over-the-counter: Pyrantel pamoate (Reese’s Pinworm Medicine) is a common treatment available without a prescription. Follow package directions for all members of your household who require treatment (see "Prevention" below).
- Prescription: If over-the-counter medication doesn’t work, doctors may prescribe Albendazole (Albenza) or Mebendazole. These medications are taken in two doses, two weeks apart, to kill both the worms and any newly hatched eggs.
Hygiene Measures:
- Handwashing: Ensure your child washes their hands frequently, especially before eating and after using the bathroom. Pay special attention to cleaning under their fingernails, as eggs can get trapped there from scratching.
- Nail care: Keep your child’s nails trimmed short and discourage nail-biting or thumb-sucking to prevent the ingestion of eggs.
- Morning baths: Bathe your child in the morning to remove any eggs laid overnight.
- Laundry: Wash bedding, pajamas, and underwear in hot water daily during treatment, as pinworm eggs can survive on surfaces for up to two weeks.
Environmental Cleaning:
- Disinfect frequently touched surfaces, such as doorknobs, toys, and countertops, to reduce the risk of reinfection.
- Vacuum carpets and floors regularly to remove any eggs that may have fallen onto surfaces.
Prevention
Since pinworm eggs can spread easily, reinfection is common. Continue practicing good hygiene and environmental cleaning for several weeks after treatment to minimize the chances of reinfection.
To help prevent spread within the home, when pinworms are identified in one family member, use these precautions:
- Treat any person who sleeps in the same bed as the infected child.
- Treat non-bed sharing family members only if they have symptoms.
- Treat all family members who develop symptoms.
- If any of your child's friends sleep over or you hear that they also have symptoms, be sure to tell their parents. These children should get tested or checked for pinworms.
When to Seek Medical Attention
If over-the-counter medications aren’t effective, or if your child continues to show symptoms, consult a healthcare provider. They can prescribe stronger treatments and ensure there are no complications from the infection.
By staying vigilant about hygiene and following the recommended treatment steps, pinworm infections can be managed effectively, reducing the chances of spread and reinfection.
