Trachoma: From Ancient Blindness to Near Elimination – A Global Health Success Story

For millennia, a silent threat has plagued communities across the globe, slowly stealing the sight of countless individuals. Trachoma, an infectious eye disease caused by the bacterium Chlamydia trachomatis, has been documented since ancient times, with evidence of its presence dating back to the Ice Age around 8000 BC. But thanks to decades of focused public health efforts, the tide is turning against this preventable cause of blindness.

A History Etched in Time

The earliest known medical descriptions of trachoma appear in ancient Egyptian texts, including the Ebers Papyrus from 1550 BC, which details treatments using ingredients like myrrh, lizard’s blood, and bat’s blood. The disease was also recognized by ancient Greek physicians like Plato and Galen, who described its progression and inflammatory effects on the eyelids. During the Napoleonic Wars in 1798, trachoma spread widely through Europe as soldiers returning from Egypt carried the infection with them, earning it the moniker “Egyptian ophthalmia.” Later, in the late 19th and early 20th centuries, trachoma became a significant public health concern in the United States, particularly among immigrants arriving at Ellis Island, leading to mandatory medical inspections to prevent its spread.

Understanding the Disease and its Spread

Trachoma is characterized by repeated infections of the conjunctiva, the membrane lining the inside of the eyelids. These infections cause inflammation and the formation of small bumps, eventually leading to scarring. Over time, the eyelids can turn inward – a condition called entropion – causing the eyelashes to rub against the cornea with each blink, resulting in severe pain, inflammation, and irreversible blindness. The disease thrives in conditions of poor hygiene, limited access to clean water, and inadequate sanitation.

Transmission occurs through direct contact with infected eye and nose secretions, particularly from children. Indirect transmission also plays a role, with contaminated towels, clothing, and hands spreading the bacteria. Perhaps surprisingly, flies, specifically the Sorbent fly which breeds in human feces, can also act as vectors, transferring the bacteria from one person to another. The presence of open defecation and lack of sufficient water for facial cleanliness create a cycle of transmission within households, and communities.

The SAFE Strategy: A Turning Point

For many years, controlling trachoma proved challenging. Early attempts at treatment with oral sulfonamides in the 1930s and 1940s were hampered by severe side effects. Later, mass distribution of tetracycline eye ointment faced issues with patient compliance due to the lengthy treatment regimen. A breakthrough came in the 1990s with the discovery that a single oral dose of azithromycin was as effective as the traditional ointment, significantly improving treatment adherence.

Recognizing the need for a comprehensive approach, the World Health Organization (WHO) introduced the SAFE strategy in 1993: Surgery to correct in-turned eyelashes, Antibiotics to clear the infection, Facial cleanliness to prevent spread, and Environmental improvement through access to clean water and sanitation. This integrated strategy, coupled with the formation of the WHO Alliance for the Global Elimination of Trachoma (GET) in 1996, marked a turning point in the fight against the disease.

Global Partnerships and Progress

The success of the SAFE strategy has been fueled by significant partnerships between international organizations, governments, and philanthropic groups. Pfizer began donating azithromycin in 1998, and has since donated over 1 billion doses. Organizations like Sightsavers and the International Trachoma Initiative (ITI) have provided crucial technical support, funding, and logistical assistance to endemic countries. The UK Department for International Development and foundations like the Bill & Melinda Gates Foundation have also made substantial investments in trachoma elimination programs.

As of November 12, 2025, Egypt was confirmed by the WHO to have eliminated trachoma as a public health problem, bringing the total number of countries worldwide to 27. This achievement means that over two million people in Egypt are no longer at risk of losing their sight to the disease. The WHO estimates that approximately 103 million people still live in trachoma-endemic areas and remain at risk, but the global prevalence has decreased dramatically since 2002.

Looking Ahead

While significant progress has been made, the fight against trachoma is not yet over. Continued investment in the SAFE strategy, particularly in areas with limited access to clean water, sanitation, and eye care, is crucial. The WHO’s Neglected Tropical Diseases road map sets a goal of global elimination by 2030. With sustained commitment and collaboration, a future free from the burden of trachoma is within reach, offering hope to millions at risk of preventable blindness.