Task Force on LTBI and test of progression

Foster development and evaluation of tests for progression of LTBI to active disease

NDWG priority addressed

Support the goal of disease elimination by addressing the reservoir of TB infection and efficiently introduce targeted preventive therapy.

Required tests: Tests for better detection of latent tuberculosis infection (LTBI) and for predicting the risk of progression from latent infection to active TB disease (Tests of progression of LTBI).


Reactivation of LTBI is the source of the vast majority of new TB cases in low transmission areas. As global TB incidence declines, preventing progression from LTBI to active TB will become more and more crucial for TB elimination. Treatment of individuals with LTBI requires a diagnostic test to identify the small proportion of latently infected persons who will progress to active disease.

Goal and Objectives

Enhance the knowledge base and support consensus-building by engaging participation of key experts and stakeholders towards further development and finalization of the following resources

  • Target Product Profile (TPP) for a test of progression of LTBI;
  • Framework for the evaluation of new LTBI tests;
  • Viewpoint paper on novel diagnostic tests required to comprehensively accomplish LTBI management.
  • Model to evaluate the impact of a test for incipient TB

Work plan highlights and key deliverables

TPP and Framework for
evaluation for a test of
progression of LTBI

Viewpoint Paper
From latent to patent:
rethinking prediction of

Frank Cobelens, Sandra Kik,
Hanif Esmail, Daniela Maria
Cirillo, Christian Lienhardt,
Alberto Matteelli, The Lancet
Respiratory Medicine, 2016

Model to evaluate the
impact of a test for
incipient TB