El Salvador has achieved a significant public health milestone, with the World Health Organization (WHO) officially validating the nation’s successful elimination of trachoma as a public health problem. This accomplishment marks a critical step forward in the global fight against the world’s leading infectious cause of preventable blindness, a disease that disproportionately affects impoverished and marginalized communities. The validation underscores El Salvador’s sustained commitment to improving the health and well-being of its population, particularly those most vulnerable to neglected tropical diseases.
A Triumph of Political Will and Community Action
The declaration by the WHO, announced following a comprehensive and rigorous validation process, is a testament to El Salvador’s dedication to public health initiatives. Dr. Tedros Adhanom Ghebreyesus, WHO Director-General, lauded the nation’s achievement, stating, "I congratulate El Salvador on this remarkable achievement. It is a testament to the power of political commitment, strategic investment, and community engagement." He further emphasized the global significance of this success, noting, "El Salvador’s success is a vital step towards our global target of eliminating trachoma worldwide by 2030 and a clear signal that a healthier, more equitable future is within reach."
Trachoma, a bacterial infection caused by Chlamydia trachomatis, is transmitted through direct contact with eye and nasal discharge from infected individuals. Repeated infections, particularly in childhood, can lead to a painful scarring of the inner eyelid known as trachomatous trichiasis. This condition causes the eyelashes to turn inward, continuously rubbing against the cornea, leading to severe pain, corneal opacification, and ultimately, irreversible blindness if left untreated. The disease thrives in environments with poor sanitation, limited access to clean water, and inadequate hygiene practices, making it a stark indicator of underlying socioeconomic disparities.
The Rigorous Path to Validation
The journey to El Salvador’s validation was a multi-year undertaking involving meticulous data collection, targeted assessments, and robust health system evaluations. The WHO’s validation process requires definitive evidence that a disease is no longer a significant public health concern within a country. This involves demonstrating not only the absence of active transmission but also the capacity of the national health system to detect, investigate, and respond effectively to any potential resurgence of the disease.
Between 2023 and 2026, El Salvador conducted extensive epidemiological surveys in communities identified as having higher risk factors, based on environmental and socioeconomic indicators. These assessments involved comprehensive screenings of children, who are most susceptible to the initial stages of trachoma (trachomatous inflammation – follicular or TF), and adults, to identify cases of trachomatous trichiasis (TT). The findings from these meticulous investigations revealed no evidence of active trachoma transmission within the country. Crucially, no signs of the disease were detected in children, and no advanced cases capable of causing blindness were identified among the adult population. This absence of disease in targeted populations, coupled with robust surveillance data, provided the conclusive evidence required by the WHO.
Dr. Jarbas Barbosa, Director of the Pan American Health Organization (PAHO), highlighted the significance of these findings. "This validation reflects El Salvador’s commitment to reaching populations in the most vulnerable conditions and generating solid evidence to demonstrate that trachoma is not endemic in the country," he stated. "It is the result of sustained efforts to reach communities, identify potential cases, and ensure no one was left behind." PAHO has been instrumental in supporting countries across the Americas in their efforts to combat neglected tropical diseases, including trachoma.
A Multisectoral Approach to Sustainable Success
El Salvador’s success in eliminating trachoma was not the result of a single intervention but rather a comprehensive, multisectoral strategy that addressed the multifaceted nature of the disease. Key components of this approach included:
- Strengthened Primary Health Care Services: Enhancing the capacity of local health centers to identify, diagnose, and manage eye conditions, including trachoma. This involved training healthcare professionals and ensuring the availability of essential diagnostic tools.
- Improvements in Water, Sanitation, and Hygiene (WASH): Recognizing that trachoma thrives in conditions of poor hygiene, El Salvador invested in improving access to clean water and sanitation facilities in at-risk communities. This is a cornerstone of preventing infectious diseases in general.
- Integrated Eye Health Services: Implementing programs for visual acuity screening in adults and ensuring access to specialized eye care services for those who require treatment for conditions that could lead to blindness.
- Inter-sectoral Collaboration: Fostering strong partnerships among various government ministries, local communities, non-governmental organizations, and international partners. This collaborative effort ensured a coordinated and effective response.
Furthermore, El Salvador has proactively established robust systems to ensure the sustainability of this achievement. This includes maintaining a cadre of trained health personnel capable of recognizing and managing potential cases, implementing integrated surveillance mechanisms to monitor for any re-emergence of the disease, and ensuring the capacity to detect and manage trichiasis cases within the national health system. This proactive approach is crucial for preventing the disease from regaining a foothold.
The Minister of Health of El Salvador, Francisco Alabi, expressed immense pride in the nation’s accomplishment. "El Salvador has reached a major health milestone by achieving certification as a country free of trachoma, the result of sustained national efforts, with the support of the Pan American Health Organization and the Embassy of Canada," he declared. "We are proud to have reached this achievement in just three years, positioning the country in the region and improving the visual health of our population."
Global Context and Broader Implications
The elimination of trachoma as a public health problem is defined by specific epidemiological thresholds set by the WHO. These include a prevalence of trachomatous trichiasis (TT) unknown to the health system of less than 0.2% in individuals aged 15 years and older, and a prevalence of trachomatous inflammation – follicular (TF) in children aged 1-9 years of less than 5%, in each formerly endemic district. Crucially, the existence of a system to identify and manage incident cases of TT is also a prerequisite.
El Salvador’s success is particularly noteworthy as it is the first country in Central America and the second in the Americas to achieve this specific milestone. This places it alongside a growing global cohort of nations that have successfully tackled this debilitating disease. Globally, 64 countries have been recognized by WHO for eliminating at least one neglected tropical disease, with seven of these nations located in the Americas.
The success in El Salvador is part of a broader regional and global effort. PAHO, through its Initiative for the Elimination of Trachoma in the Americas, has been a key partner in supporting national endeavors. The collaboration with the Government of Canada provided vital technical and financial support for El Salvador’s elimination process. These initiatives often create opportunities for delivering integrated health services to communities, addressing multiple health needs simultaneously during assessment phases.
Trachoma remains endemic in rural and remote areas of Brazil, Colombia, Guatemala, and Peru within the Americas. Regional efforts are ongoing to further define the epidemiological status of the disease in Bolivia, Ecuador, Guyana, Panama, Paraguay, and Venezuela. El Salvador’s achievement serves as a powerful inspiration and a model for these countries.
The WHO’s "road map for neglected tropical diseases 2021–2030" outlines ambitious targets for the control, elimination, and eradication of these diseases. Trachoma is one of over 30 communicable diseases and related conditions targeted under PAHO’s Disease Elimination Initiative, which aims to eliminate them in the Americas by 2030. The sustained global effort against trachoma, including the WHO Alliance for the Global Elimination of Trachoma by 2020 (GET2020), has mobilized governments, NGOs, and academic institutions worldwide.
The implications of El Salvador’s achievement extend beyond the immediate public health benefits. Eliminating a disease like trachoma, which is intrinsically linked to poverty and inequity, signifies progress in addressing social determinants of health. It demonstrates that with focused political will, strategic investment, and strong community partnerships, even the most persistent and devastating neglected tropical diseases can be overcome. The WHO strongly recommends that countries that have achieved elimination maintain robust surveillance systems and ensure continued access to quality eye care services to prevent any potential re-emergence of the disease. El Salvador’s proactive approach to sustaining its gains suggests a strong commitment to safeguarding this hard-won victory for the long term.
