The persistent armed conflict in Colombia has cast a long shadow over public health, profoundly influencing the incidence and mortality rates of tuberculosis (TB) within the nation’s municipalities. A groundbreaking study conducted by the Barcelona Institute for Global Health (ISGlobal), proudly supported by the ”la Caixa” Foundation, has shed light on this pressing issue through the development of a novel municipal-level armed conflict intensity index. This innovative approach not only quantifies the scale of violence across territories but also intricately links these conflict metrics with disparities in tuberculosis outcomes, revealing compelling insights into the intersection of violence and disease.
Published in the prestigious journal BMJ Global Health, this extensive investigation analyzed data spanning 1,122 Colombian municipalities over a crucial twelve-year period from 2008 to 2019. The research meticulously integrated multiple dimensions of armed violence—including kidnappings, forced displacements, disappearances, and direct armed engagements—with comprehensive epidemiological surveillance and mortality records. Conflict-related data were meticulously gathered from the National Observatory of Historical Memory, while TB morbidity and mortality figures were sourced from the National Public Health Surveillance System, enabling a robust and multidimensional examination of how conflict intensity correlates with health disparities.
Central to this study was the construction of a conflict intensity index, categorizing municipalities into stratified levels of violence during two distinct temporal phases: 2008–2013 and 2014–2019. This stratification offered a longitudinal perspective, revealing dynamic changes in conflict severity while correlating these fluctuations with shifts in tuberculosis incidence and mortality. By methodically aligning violence metrics with public health data, the researchers illuminated not only the spatial heterogeneity in TB burden but also underscored the temporal persistence of health inequalities driven by conflict.
The results depict a stark reality: municipalities riddled with the highest degrees of violence consistently bore the brunt of tuberculosis cases throughout the analyzed timeframe. Nationally, while TB case notifications exhibited a commendable overall decline of 16%, this downward trajectory was far from equitable. Significant territorial disparities endured, with the most conflict-affected areas registering persistently higher TB case rates. Mortality trends mirrored this pattern, showing a modest 9% reduction across Colombia; however, regions battered by intense conflict continued to suffer disproportionately elevated TB death rates, underscoring the lethal synergy between violence and disease.
The mechanisms through which armed conflict exacerbates tuberculosis are complex and deeply interwoven. Salomé Valencia, the ISGlobal predoctoral researcher and lead author, emphasized that the indirect health consequences of protracted conflicts are profound. Forced migration and displacement push populations into overcrowded shelters with suboptimal ventilation and unstable housing—conditions known to foment the transmission and progression of TB. These precarious living environments intersect with nutritional deficiencies, compromised immune systems from HIV and other morbidities, and disrupted healthcare access, collectively forging a perfect storm for adverse TB outcomes.
Striking disparities emerge when analyzing TB incidence across demographic groups, emphasizing the disproportionate impact on vulnerable populations. The study’s granular analysis by age and sex revealed that infants under one year old faced particularly acute inequality, with TB risk surging by 39% in high-conflict municipalities relative to those with lower conflict intensity. Likewise, women bore a heavier burden of persistent inequalities in TB case notifications. Such differential impacts highlight the compounded vulnerabilities of marginalized groups, exacerbated in contexts rife with violence and social instability.
The plight of indigenous communities featured prominently in the researchers’ findings. On Colombia’s Pacific coast—a region marked by both geographic isolation and protracted conflict—indigenous groups experienced alarmingly high TB notification rates, peaking at 192.1 per 100,000 inhabitants. These figures starkly illustrate how conflict and remoteness synergize to hinder healthcare access, disrupt routine public health services, and stifle disease detection and management within already marginalized populations. Alberto Garcia-Basteiro, ISGlobal’s senior author, stressed that these communities endure some of the most profound barriers amid Colombia’s complex socio-political landscape.
Recognizing these entrenched inequities, the study advocates for tailored public health strategies that are sensitive to the conflict realities of each municipality. The research team calls for the integration of conflict-sensitive frameworks within tuberculosis surveillance, prevention, and treatment programs. Such approaches would be designed to navigate the unique logistical and social challenges posed by violence, aiming to close the gap in TB outcomes across territories. Strengthening public health systems to adapt dynamically to conflict contexts could prove pivotal in mitigating the health toll of protracted violence.
Beyond the Colombian context, this work introduces an analytical framework of significant methodological innovation that can be applied to other regions grappling with armed conflicts. By systematically linking violence intensity metrics with infectious disease data at the municipal level, this approach offers a powerful tool for unveiling hidden health inequalities and crafting evidence-driven policies. This transferability holds the promise of informing global public health interventions in myriad conflict-affected settings, where infectious diseases often flourish in the shadows of violence.
The research team’s interdisciplinary expertise underscores the study’s robustness, encompassing epidemiologists and public health professionals from ISGlobal as well as the National Institute of Health and the National University of Colombia in Bogotá. Their collaborative synergy ensured a rigorous analytical process grounded in high-quality data and contextual understanding, enhancing the relevance and potential impact of their findings on both scientific and policy fronts.
In conclusion, this study illuminates the intricate and often overlooked intersections between sustained armed conflict and tuberculosis outcomes in Colombia, revealing a landscape where violence acts as both a direct and indirect driver of health inequities. By developing a conflict intensity index and rigorously correlating it with TB epidemiology, the research offers a crucial lens through which to view and address the persistent health challenges faced by populations in conflict-affected regions. The call for conflict-sensitive, locally adapted health strategies holds critical implications for global health equity and the future of infectious disease control amidst enduring violence.
Subject of Research: People
Article Title: Armed conflict intensity and inequalities in tuberculosis outcomes in Colombia municipalities, 2008–2019
News Publication Date: 26-Mar-2026
Web References: https://gh.bmj.com/content/11/3/e019144
References: Valencia-Aguirre, S., Castañeda, CA., Gutiérrez, JC., Cotes, K., Garcia-Basteiro, AL., Armed conflict intensity and inequalities in tuberculosis outcomes in Colombian municipalities, 2008–2019. BMJ Global Health, 2025. DOI: 10.1136/bmjgh-2025-019144
Keywords: Tuberculosis, Health care, Social inequality, Armed conflict, Colombia, Infectious diseases, Public health, Epidemiology
