A71 Trachoma

Name of the Condition

• Trachoma

Summary

Trachoma is a chronic infectious disease of the eye caused by the bacterium Chlamydia trachomatis. It primarily affects the conjunctiva and cornea, leading to inflammation, scarring, and potentially irreversible vision impairment if left untreated. The condition is a leading cause of preventable blindness worldwide, particularly in regions with limited access to clean water and healthcare.

Causes

Trachoma is caused by repeated infection with Chlamydia trachomatis, a bacterium transmitted through direct or indirect contact with eye or nasal discharge from infected individuals. Flies can also act as vectors, spreading the bacteria from person to person. Poor hygiene and crowded living conditions facilitate transmission.

Risk Factors

• Living in areas with inadequate sanitation and limited access to clean water.
• Close contact with infected individuals, especially in households or communities.
• Lack of facial cleanliness, particularly in children.
• Exposure to flies and other vectors in endemic regions.

Symptoms

• Eye irritation, redness, and discharge.
• Swelling of the eyelids (chemosis).
• Formation of follicles on the inner eyelid (trachomatous inflammation—follicular, or TF).
• Scarring of the eyelid (trachomatous scarring, or TS).
• Inward turning of the eyelashes (trachomatous trichiasis, or TT), which can scratch the cornea.
• Corneal opacity, leading to vision loss.

Diagnosis

Diagnosis is based on clinical examination of the eye, including assessment of inflammation, follicles, scarring, and eyelash position. Laboratory tests, such as nucleic acid amplification tests (NAATs) or antigen detection, may confirm the presence of Chlamydia trachomatis in severe or atypical cases. Grading systems (e.g., WHO simplified grading) are used to classify disease severity.

Treatment Options

• Antibiotics: Oral azithromycin is the first-line treatment for active infection, often administered in mass drug administration (MDA) campaigns in endemic areas.
• Surgery: Corrective surgery for trichiasis (e.g., bilamellar tarsal rotation) to prevent corneal damage.
• Facial cleanliness and environmental improvements: Promoting hygiene and reducing fly exposure to prevent reinfection.

Prognosis and Follow-Up

With early and appropriate treatment, the progression of trachoma can be halted, and vision loss prevented. However, scarring and trichiasis may persist despite treatment. Regular follow-up is essential to monitor for recurrence or complications, especially in endemic regions. Long-term prognosis depends on access to sustained interventions and hygiene improvements.

Complications

• Corneal scarring and opacity, leading to partial or complete blindness.
• Trichiasis, causing chronic eye pain and further corneal damage.
• Reduced quality of life due to visual impairment.

Lifestyle & Prevention

• Practice good facial hygiene, including regular face washing.
• Ensure access to clean water for personal and household use.
• Implement vector control measures, such as reducing fly breeding sites.
• Participate in mass drug administration programs in endemic areas.
• Seek early treatment for eye infections to prevent progression.

When to Seek Professional Help

Seek medical attention if you experience persistent eye redness, discharge, or pain, especially in regions where trachoma is common. Immediate care is critical if eyelashes turn inward (trichiasis) or vision becomes impaired, as these may indicate advanced disease requiring urgent intervention.

Tips for Medical Coders

When coding for trachoma (ICD-10-CM code A71), document the specific clinical findings, such as inflammation, scarring, or trichiasis, to support the diagnosis. Note any interventions, like antibiotic treatment or surgery, as these may impact coding specificity. Ensure documentation aligns with the WHO grading system if used, as this can guide appropriate code assignment.