FAQ on Genomic Sequencing for Drug Resistant Tuberculosis

Following the publication of new recommendations by WHO on the use of targeted next generation sequencing, GLI is publishing an FAQ on Genomic Sequencing for Drug Resistant Tuberculosis. The document provides answers to common questions on genome sequencing and includes chapters on general issue, wet lab issues and analysis issues. The document can be downloaded here

Planning and budgeting tool for TB and drug resistant TB testing: calculation tool
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Line probe assays for detection of drug-resistant tuberculosis: interpretation and reporting manual for laboratory staff and clinicians
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GLI Guide to TB Specimen Referral Systems and Integrated Networks

This guide describes the various phases to create and strengthen specimen referral systems, essential components involved in referral, as well as other considerations for TB programme and laboratory managers, Ministry of Health officials, and other stakeholders across disease programmes. In addition to describing transport mechanisms and equipment required to move specimens in a safe manner, this guide also provides information on logistics, results reporting, data management, monitoring and evaluation, and standard operating procedures that will facilitate and improve specimen referral systems.

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GLI Planning for country transition to Xpert MTB/RIF Ultra Cartridges

This guide provides practical guidance to develop an actionable implementation plan to smoothly transition to use of Xpert MTB/RIF Ultra cartridges, ensuring uninterrupted service and avoiding cartridge wastage. Topics covered in the guide include adapting national guidelines and diagnostic algorithms; managing existing cartridge supply, forecasting, procurement and distribution; planning site-level computer software upgrades and trainings of laboratory personnel and clinicians; ensuring coordination among donors and partners supporting Xpert implementation in countries; and monitoring impact of the roll-out of Xpert MTB/RIF Ultra.

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Framework of indicators and targets for laboratory strengthening under the End TB Strategy

This Framework, developed as a collaboration between the WHO Global TB Programme and the GLI core group, comprises 12 core indicators that measure countries’ capacity to detect TB accurately and rapidly using new diagnostics, provide universal DST, and ensure the quality of testing. The Framework serves as a guide for all countries developing plans for laboratory strengthening during 2016-2025, and also provides methods for calculating country-specific targets for the numbers of tests and facilities needed for each of the main diagnostic technologies.

Laboratory Diagnosis of Tuberculosis by Sputum Microscopy - The GLI Handbook

Guidelines for sputum smear microscopy have been published by WHO and The Union, but in the decade since publication, many developments have occurred and a revised and updated text replacing both was considered timely. The GLI Handbook is a practical guide for the laboratory technician; it draws on the ideas outlines above and references best practice documents released by WHO and the GLI. The Handbook uses simple text and clear illustrations to assist laboratory staff in understanding the important issues involved in conducting sputum smear microscopy for the diagnosis of TB.

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GLI TB Microscopy Network Accreditation: an Assessment Tool

Although there are many international guidelines and technical materials for procedures and EQA, there is little or no external validation to assure that countries are adequately managing the microscopy networks. This accreditation tool is based on the many WHO-approved guidelines that provide technical direction, recommendations and specific forms to document and monitor performance of microscopy networks. The tool is composed of eleven standards with each a corresponding measure defining the minimum allowable performance to achieve accreditation.

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GLI/NDWG Meeting report on high-priority target product profiles for new TB diagnostics

Diagnostic manufacturers are increasingly expressing the need to be informed about the type of TB diagnostics they should invest in, as well as the potential market size for these products. The development of target product profiles (TPPs) is therefore an important step to align the needs of end-users with the specifications and targets that product developers should meet in terms of the performance and operational characteristics of such tests. Consensus on the minimal and optimal specifications of four different types of TB diagnostic tests has been reached following a meeting convened by WHO on behalf of GLI and the New Diagnostics Working Group.

GLI Ventilated Workstation Manual for AFB Smear Microscopy


Laboratories performing AFB smear microscopy as well as Xpert MTB/RIF require adequate ventilation to minimize the occupational risk of infection. However, this is difficult to achieve in many settings where facilities have limited airflow, and where commercially produced biosafety cabinets are not affordable or appropriate. This guide provides specifications for the manufacture of a ventilated workstation that has been validated.

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