B80 Enterobiasis

Name of the Condition

• Enterobiasis

Summary

Enterobiasis is a parasitic infection caused by the pinworm Enterobius vermicularis. It is characterized by perianal itching, particularly at night, and is highly contagious. The infection is common in children and can affect individuals of all ages. While often mild, it may cause discomfort and disrupt sleep.

Causes

The infection is caused by the ingestion of Enterobius vermicularis eggs, which hatch in the intestine and mature into adult worms. Adult female worms migrate to the perianal area to lay eggs, leading to itching and potential transmission to others through contaminated surfaces or direct contact.

Risk Factors

• Close contact with infected individuals, especially in households or institutional settings.
• Poor hand hygiene, particularly after scratching the perianal area.
• Shared bedding, clothing, or toys in environments with infected persons.
• Age, with children and those in close living conditions at higher risk.

Symptoms

• Intense perianal itching, often worsening at night.
• Restlessness or disrupted sleep due to itching.
• Visible pinworms in the perianal area, especially in the early morning.
• Mild abdominal discomfort or irritability in some cases.

Diagnosis

Diagnosis is typically confirmed by identifying pinworm eggs or adult worms. The "tape test" (pressing clear tape against the perianal area in the morning) is a common method to collect eggs for microscopic examination. Clinical history and symptoms may also support the diagnosis.

Treatment Options

Treatment involves anthelmintic medications, such as albendazole or mebendazole, to eliminate the worms. A second dose is often recommended 2 weeks later to prevent reinfection. Household members may be treated simultaneously to reduce transmission risk.

Prognosis and Follow-Up

With proper treatment, the prognosis is excellent, and symptoms usually resolve within a few days. Follow-up may include rechecking for eggs 2–4 weeks after treatment to ensure eradication. Reinfection is common if hygiene measures are not maintained.

Complications

Complications are rare but may include secondary bacterial skin infections from scratching. In severe cases, particularly in immunocompromised individuals, the infection could spread to other organs, though this is uncommon.

Lifestyle & Prevention

• Practice thorough handwashing, especially after using the toilet and before eating.
• Keep fingernails short to minimize skin damage from scratching.
• Launder bedding, clothing, and towels in hot water regularly.
• Avoid sharing personal items like towels or bedding.
• Bathe in the morning to remove eggs laid overnight.

When to Seek Professional Help

Seek medical attention if symptoms persist after treatment, if there are signs of a secondary infection (e.g., redness, swelling, pus), or if the infection spreads to others despite preventive measures.

Tips for Medical Coders

Use code B80 for confirmed cases of enterobiasis. Documentation should include clinical findings (e.g., perianal itching, visible worms) or diagnostic test results (e.g., tape test positive for eggs). Ensure the code is assigned when the infection is the focus of care or a significant factor in management.