Tuberculosis Control Strategies and Treatment Outcomes

Tuberculosis remains a leading infectious cause of morbidity and mortality worldwide, with control efforts guided by the World Health Organization’s End TB Strategy. Core interventions include the directly observed treatment short course (DOTS), strengthened surveillance, rapid molecular diagnostics and integration of private and public healthcare providers through public–private mix (PPM) models. Treatment regimens have evolved to incorporate shorter combination therapies for drug-susceptible disease and more effective multidrug-resistant tuberculosis (MDR-TB) protocols. Social protection measures, such as out-of-pocket cost exemptions and patient support packages, play an increasing role in fostering adherence and improving treatment success rates. Despite these advances, outcomes vary substantially across regions and population subgroups, with loss to follow-up (LTFU), geographic barriers and socioeconomic deprivation continuing to undermine global targets. Novel strategies under investigation include digital adherence monitoring, decentralised care platforms and adjunctive host-directed therapies. The overarching aim is to achieve high treatment completion rates while reducing transmission, minimising drug resistance and addressing the social determinants of health that perpetuate the epidemic.

Research from Nature Portfolio

Recent studies have revealed that traditional reporting methods underestimate patient attrition within PPM programmes. By linking individual records across institutions, investigators demonstrated that nominal transfer-out events mask a substantially higher true rate of LTFU. Analyses identified foreign-born status, previous treatment interruption and increasing distance from treatment centres as key risk factors. These findings highlight the necessity of unified national registries and seamless data sharing between public and private providers to ensure accurate outcome monitoring and targeted interventions to retain patients in care.

Tuberculosis Control Strategies and Treatment Outcomes publication trend

The graph below shows the total number of articles in tuberculosis control strategies and treatment outcomes across all publications each year (not limited to Nature Index journals).

Technical terms

Directly observed treatment short course (DOTS): A standardised approach requiring supervised administration of anti-TB drugs to ensure adherence.

Loss to follow-up (LTFU): Occurrence when a patient discontinues or fails to complete the prescribed treatment regimen.

Public–private mix (PPM): Collaborative framework integrating private healthcare providers into national TB control programmes.

Multidrug-resistant tuberculosis (MDR-TB): TB caused by strains resistant to at least isoniazid and rifampicin, the two most potent first-line drugs.

Disability-adjusted life year (DALY): A metric combining years of life lost and years lived with disability to quantify disease burden.

References

1. Risk of loss to follow-up among tuberculosis patients in South Korea: whom should we focus on?. Frontiers in Public Health (2023).
2. Evaluating the impact of the nationwide public–private mix (PPM) program for tuberculosis under National Health Insurance in South Korea: A difference in differences analysis. PLOS Medicine (2021).
3. Hidden loss to follow-up among tuberculosis patients managed by public–private mix institutions in South Korea. Scientific Reports (2022).
4. Beyond reducing direct medical cost: examining health outcomes in tuberculosis through a difference-in-differences analysis of South Korea’s out-of-pocket payment exception policy. Frontiers in Public Health (2024).