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Pulmonary Tuberculosis IV

Pulmonary Tuberculosis IV

Tuberculosis, more commonly referred to as TB, is an infectious disease stemming from Mycobacterium tuberculosis. While it primarily impacts the lungs, TB can also affect other body areas. Given its severity and global impact, timely and accurate diagnosis is crucial for controlling its spread and improving patient outcomes.
Several diagnostic approaches are used to detect TB. The conventional method is the Tuberculin Skin Test (TST), also known as the Mantoux test. However, this method has...

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Demonstrating a Multi-drug Resistant Mycobacterium tuberculosis Amplification Microarray

Demonstrating a Multi-drug Resistant Mycobacterium tuberculosis Amplification Microarray

Published on: April 25, 2014

A novel isothermal amplification-based method to detect Mycobacterium tuberculosis complex.

Dongxin Liu¹, Bing Zhao², Xichao Ou²

¹National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Changping, Changbai Road 155, Beijing 102206, China.

Journal of Microbiological Methods

|November 8, 2017

Summary

This summary is machine-generated.

A new rapid diagnostic test accurately detects Mycobacterium tuberculosis (MTB) using multiple cross displacement amplification (MCDA) and hydroxy naphthol blue (HNB). This affordable point-of-care assay offers a faster alternative for tuberculosis diagnosis.

Keywords:

Diagnostics Isothermal amplification Mycobacterium tuberculosis Tuberculosis

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A Tuberculosis Molecular Bacterial Load Assay TB-MBLA

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Published on: April 30, 2020

Area of Science:

Molecular Biology
Diagnostic Microbiology
Public Health

Background:

Tuberculosis, caused by Mycobacterium tuberculosis (MTB), necessitates rapid and accurate diagnostics for effective control.
Existing diagnostic methods for MTB often lack the desired speed, simplicity, or affordability for widespread use.
Development of novel, accessible diagnostic tools is critical for global tuberculosis prevention strategies.

Purpose of the Study:

To develop a rapid, simple, and affordable diagnostic assay for the detection of Mycobacterium tuberculosis complex.
To utilize multiple cross displacement amplification (MCDA) combined with a colorimetric indicator for MTB detection.
To evaluate the performance of the developed assay, designated MTB-MCDA-HNB, for potential point-of-care application.

Main Methods:

A multiple cross displacement amplification (MCDA) assay was designed to target the IS6110 gene specific to the M. tuberculosis complex.
Hydroxy naphthol blue (HNB), a colorimetric indicator, was employed for direct visual detection of MCDA amplification products.
The assay was optimized for a 40-minute isothermal amplification at 68°C, with results determined by color change within 85 minutes from specimen processing.

Main Results:

The MTB-MCDA-HNB assay successfully detected as little as 1 pg of DNA from Mycobacterium bovis (BCG strain).
No cross-reactivity was observed with common nontuberculous mycobacteria (NTM) species, indicating high specificity.
Clinical sample testing demonstrated a sensitivity of 94.7% and a specificity of 92.9% compared to the Xpert MTB/RIF method.

Conclusions:

The developed MTB-MCDA-HNB assay provides a rapid, sensitive, and specific method for detecting Mycobacterium tuberculosis complex.
The assay's simplicity, affordability, and short turnaround time make it suitable for point-of-care diagnostics.
This novel diagnostic approach holds significant promise for improving tuberculosis detection, particularly in resource-limited settings.