Disease Description (Causes and Symptoms)
- Definition: Enterobiasis is a disease caused by infection with pinworms (Enterobius vermicularis), an intestinal parasite. Pinworm eggs can survive for a long time even in dry environments and may cause mass infections.
- Causes / pathophysiology:
- When pinworm eggs are ingested orally, larvae grow into adult worms in the small and large intestines. At night, adult worms (mainly females) emerge around the anus and lay eggs, secreting substances that cause itching and irritation.
- When the anus is scratched due to itching, eggs on the hands can be transferred back to the mouth, making reinfection easy. Mass infections among family members are common within households or groups (such as daycare centers).
- Main symptoms:
- Perianal pruritus (especially worsening at night and during sleep)
- Thin, thread-like worms may be seen in stool, around stool, or in underwear
- Sleep disturbance, irritability, skin scratching (eczema), and possible secondary bacterial infection
Treatment Methods
- Drug treatment (generally recommended; the provided information takes priority)
- Mebendazole: Take a single 100 mg dose, followed by a repeat dose 1–2 weeks later (to prevent recurrence).
- Albendazole: A single 200 mg dose for children under 2 years of age and a single 400 mg dose for those aged 2 years or older, followed by a repeat dose 3 weeks later (based on the provided information).
- (Alternative medication) Pyrantel pamoate: Take a single weight-based dose according to standard recommendations, followed by readministration 2 weeks later (follow the doctor's instructions).
- Caution: Some anthelmintics may be contraindicated during early pregnancy. If pregnancy is possible or you are pregnant, consult a doctor.
- Non-drug management
- Simultaneous treatment of the patient and all family members is recommended (to prevent reinfection among family members).
- Wash bedding, underwear, and pajamas in hot water and dry them (or iron them) to remove eggs.
- Clean every corner of the home and wash or disinfect cushioned mats and toys.
- Keep fingernails short and wash hands frequently; prevent scratching by wearing underwear at night and changing underwear, etc.
- Precautions / risk of complications
- Repeated scratching around the anus may cause skin damage, eczema, and secondary bacterial infection.
- In women, vaginal invasion by pinworms may cause vaginitis and bladder irritation symptoms (rarely).
- Natural immunity does not develop after pinworm infection, so reinfection is possible upon exposure.
Checklist Before an Outpatient Visit (Including Example Questions)
- Items and information to prepare:
- List of currently used medications (including prescription drugs, over-the-counter medications, and supplements)
- When the symptoms began and how they have progressed (whether they are worse at night, whether there is sleep disturbance, etc.)
- A photograph (if possible) or specimen if worms were directly seen in the stool
- Whether family members, housemates, or people at a daycare center/school have recently had similar symptoms
- Any treatment already received (if applicable, medication name and time of administration) and history of allergies
- If possible, a Scotch tape (transparent tape) sample collected immediately after waking in the morning (before defecation), or stool test results
- Information about tests that may be performed at the hospital:
- Applying and removing Scotch tape around the anus in the morning and examining it on a glass slide (a diagnostic method for pinworm eggs)
- Stool testing if necessary (to distinguish other parasitic infections)
Examples of General Questions to Ask the Doctor
- "What is the purpose of the prescribed medication, and what side effects should I expect?"
- "What is the interval between doses, and is repeat testing necessary? When should I visit again?"
- "Does the entire family need to be treated? Do I need to notify the school or daycare center?"
- "What medication should be used during pregnancy or when planning a pregnancy?"
- "What measures should I prioritize at home to prevent reinfection?"
Examples of Disease-Specific Questions
- "Do the other family members at home (especially children) also need to be treated at the same time? What are the timing and method of treatment?"
- "How should bedding, toys, and furniture be washed and disinfected (specific methods such as temperature, detergent, and ironing)?"









