02686nas a2200253 4500000000100000008004100001260003700042653002400079653005700103100001300160700001500173700001200188700001400200700001100214700001300225700001400238700001700252245012000269856009900389300000900488490000700497520191400504022001402418 2023 d bPublic Library of Science (PLoS)10aInfectious Diseases10aPublic Health, Environmental and Occupational Health1 aJoshi AB1 aBanjara MR1 aChuke S1 aKroeger A1 aJain S1 aAseffa A1 aReeder JC1 aChatterjee M00aAssessment of the impact of implementation research on the Visceral Leishmaniasis (VL) elimination efforts in Nepal uhttps://journals.plos.org/plosntds/article/file?id=10.1371/journal.pntd.0011714&type=printable a1-190 v173 a

Nepal, Bangladesh, and India signed a Memorandum of Understanding (MoU) in 2005 to eliminate visceral leishmaniasis (VL) as a public health problem from the Indian subcontinent by 2015. By 2021, the number of reported VL cases in these countries had declined by over 95% compared to 2007. This dramatic success was achieved through an elimination programme that implemented early case detection and effective treatment, vector control, disease surveillance, community participation, and operational research that underpinned these strategies. The experience offered an opportunity to assess the contribution of implementation research (IR) to VL elimination in Nepal. Desk review and a stakeholder workshop was conducted to analyse the relationship between key research outputs, major strategic decisions in the national VL elimination programme, and annual number of reported new cases over time between 2005 and 2023. The results indicated that the key decisions across the strategic elements, throughout the course of the elimination programme (such as on the most appropriate tools for diganostics and treatment, and on best strategies for case finding and vector management), were IR informed. IR itself responded dynamically to changes that resulted from interventions, addressing new questions that emerged from the field. Close collaboration between researchers, programme managers, and implementers in priority setting, design, conduct, and review of studies facilitated uptake of evidence into policy and programmatic activities. VL case numbers in Nepal are now reduced by 90% compared to 2005. Although direct attribution of disease decline to research outputs is difficult to establish, the Nepal experience demonstrates that IR can be a critical enabler for disease elimination. The lessons can potentially inform IR strategies in other countries with diseases targeted for elimination.

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