B05.81 Measles keratitis and keratoconjunctivitis

Name of the Condition

• Measles keratitis and keratoconjunctivitis

Summary

Measles keratitis and keratoconjunctivitis is a specific ocular complication of measles, involving inflammation of the cornea (keratitis) and the conjunctiva (keratoconjunctivitis). This condition typically occurs during or after the acute phase of measles infection and may present with symptoms such as eye pain, redness, and visual disturbances. The inflammation can range from mild to severe, potentially affecting visual acuity if not properly managed.

Causes

Measles keratitis and keratoconjunctivitis is caused by the measles virus, a member of the Paramyxoviridae family. The virus can directly infect ocular tissues or trigger an immune-mediated inflammatory response, leading to keratitis and conjunctivitis. Secondary bacterial infections may also contribute to the severity of the ocular symptoms.

Risk Factors

• Lack of vaccination or incomplete immunization against measles.
• Close contact with an infected individual, particularly in crowded or enclosed environments.
• Immunocompromised states, including HIV/AIDS, chemotherapy, or chronic steroid use.
• Age extremes, with infants and adults over 20 years at increased risk for severe ocular complications.
• Malnutrition or vitamin A deficiency, which may impair ocular immune function and worsen outcomes.

Symptoms

• Eye pain or discomfort.
• Redness and swelling of the conjunctiva.
• Photophobia (sensitivity to light).
• Blurred vision or visual disturbances.
• Excessive tearing or discharge.
• Corneal opacity or clouding in severe cases.

Diagnosis

Diagnosis is based on clinical presentation, including ocular symptoms and a history of measles infection. A physical examination of the eyes, including slit-lamp evaluation, may reveal signs of keratitis or conjunctivitis. Laboratory tests, such as viral culture or PCR, can confirm measles infection, while corneal staining or imaging may assess the extent of keratitis. Differential diagnosis may include other viral or bacterial eye infections.

Treatment Options

Treatment focuses on managing symptoms and preventing complications. Topical antiviral or antibiotic eye drops may be used to address viral infection or secondary bacterial involvement. Corticosteroid eye drops can reduce inflammation but require careful monitoring to avoid adverse effects. Vitamin A supplementation may be recommended, especially in malnourished individuals, to support ocular healing. Pain relief and lubricating eye drops can alleviate discomfort.

Prognosis and Follow-Up

Prognosis is generally favorable with appropriate treatment, though severe keratitis may lead to corneal scarring or vision impairment. Follow-up care is essential to monitor for resolution of symptoms and detect any long-term ocular damage. Regular eye examinations may be necessary, particularly if visual disturbances persist or worsen.

Complications

• Corneal scarring or opacity, potentially causing permanent vision loss.
• Secondary bacterial infections of the eye.
• Chronic keratitis or conjunctivitis.
• Vision impairment or blindness in severe, untreated cases.

Lifestyle & Prevention

• Ensure complete measles vaccination to prevent infection.
• Practice good hygiene, including handwashing, to reduce transmission risk.
• Avoid close contact with infected individuals during outbreaks.
• Maintain adequate nutrition, including vitamin A, to support immune function.
• Use protective eyewear in environments with potential eye irritation.

When to Seek Professional Help

Seek medical attention if you experience persistent eye pain, severe redness, vision changes, or discharge, especially if you have a recent history of measles. Prompt evaluation is crucial to prevent complications and preserve vision.

Tips for Medical Coders

When coding for measles keratitis and keratoconjunctivitis, use ICD-10-CM code B05.81. Document the ocular symptoms, timing relative to measles infection, and any associated findings (e.g., corneal changes) to support the diagnosis. Ensure the code aligns with the clinical documentation and reflects the specific ocular involvement.