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WHO Approves India’s Cost-Effective TB Test

A technology to diagnose tuberculosis (TB), and its multi-drug resistant variant, faster and at a lower cost by Indian researchers has received approval from the World Health Organisation (WHO).

The WHO’’s Global TB Programme has included TrueNat TB test, a new molecular test that detects TB as well as resistance to the drug Rifampicin in about 90 minutes, in its rapid communication document on molecular investigative procedure in laboratory medicine and pharmacology.

Talking about its significance, director general Indian Council of Medical Research (ICMR), and secretary Department of Health Research, Dr Balram Bhargava, in a statement said that WHO endorsement of the technology would enable low and middle-income countries to procure TrueNat for TB and Rifampicin resistance, which will help in eliminating the disease in developing countries.

At 2.7 million new infections, India is home to almost a quarter of world’s TB patients. The Indian government has set an ambitious target of eliminating the disease by 2025- five years before the global target.

The TrueNat assay kit is highly cost-effective compared to GeneXpert and can be used in peripheral centres without an air conditioned laboratory as it runs on battery which can be solar powered.

The kit works in two steps. In the first step, the DNA is extracted from the sputum and the second stage involves detection of tuberculosis and multi-drug resistant TB.

Supported by the Department of Health Research (DHR), Ministry of Health and DBT, various indigenous technologies developed by Indian scientists and companies for detection of multi-drug resistant (MDR)/extensively drug-resistant (XDR) TB were reviewed.

The most promising kits were selected by an expert group and those were subjected to a double-blind validation in comparison to standard tests at four national reference laboratories of the country.

After a stringent review, a series of validation, subsequent feasibility studies and continuous follow-up, the ‘’TrueNat MTB & Rif’’ assay was found to be on par with the internationally recognized molecular assay Gene Xpert in terms of sensitivity and specificity and detection of rifampicin resistance.

This was taken up by National TB Elimination Programme after recommendations from ICMR.

As part of WHO’’s pre-qualification process, ICMR funded Indian centres of the FIND-coordinated multi-central, prospective field evaluation study in four countries -- India, Ethiopia, Peru and Papua-New Guinea.

Based on the interim analysis of data, WHO included TrueNat as test to diagnose TB, replacing sputum smear microscopy, and to sequentially detect rifampicin resistance in view of its high diagnostic accuracy. The study has completed enrolment at all sites and a final analysis would be undertaken soon by FIND, Geneva, the ICMR statement further read.

Source: hindustantimes

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