The connection between malnutrition and tuberculosis transmission creates a preventable tragedy in resource-limited settings, where household contacts face dramatically elevated infection risk. Economic modeling now demonstrates that strategic nutritional intervention can break this cycle at surprisingly low cost per life saved.
Markov modeling of 100,000 household contacts in Jharkhand revealed that monthly food baskets delivering 750 calories and 23 grams of protein daily, plus micronutrient tablets, reduced TB episodes by 38% and deaths by 58% over two years. The intervention cost just $289 per disability-adjusted life year averted from the healthcare perspective, well below India's cost-effectiveness threshold. Over recipients' lifetimes, the program prevented 11,524 DALYs, with uncertainty intervals confirming robust benefits across multiple scenarios.
This analysis transforms our understanding of TB prevention economics by quantifying what infectious disease specialists have long suspected: addressing the nutritional vulnerability that predisposes contacts to infection yields exceptional returns on investment. The findings challenge the conventional wisdom that nutritional interventions are cost-prohibitive in TB control programs. However, the modeling relies on RATIONS trial data from a specific population, and real-world implementation faces logistical complexities not captured in economic projections. The research represents a paradigm shift toward viewing nutrition as core TB prevention infrastructure rather than auxiliary support, potentially reshaping global TB control strategies in high-burden, resource-constrained settings where household transmission drives epidemic persistence.