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. 2018 Jan 23;8:1433. doi: 10.1038/s41598-018-19757-5

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© The Author(s) 2018

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Flow diagram showing health states, treatment outcomes and the passive and active case-finding care pathways followed by patients in the compartmental model of tuberculosis. (a) Compartments labelled in red denote infectious health states. Dashed lines represent the process of diagnosis and treatment initiation, following pathways represented in (b) and (c). Panel (b) shows the radiology based case finding pathway and (c) the radiology followed by GeneXpert case finding pathway. MDR TB* disease presumptively treated with DS TB drugs switched to MDR TB treatment after DST results.