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Introduction The Xpert MTB/RIF assay is an automated, cartridge-based molecular test used to detect Mycobacterium tuberculosis (MTB) and rifampicin (RIF) resistance, the most potent first-line anti-TB drug. Endorsed by the WHO in 2010, the Xpert MTB/RIF assay revolutionized TB diagnosis by providing results in less than two …
Introduction Xpert MTB/RIF Ultra is an automated diagnostic test designed for the rapid and simultaneous detection of Mycobacterium tuberculosis (MTB) and resistance to rifampin (RIF). It is a second-generation assay developed by Cepheid to provide significantly higher sensitivity than the original Xpert MTB/RIF, particularly for …
Introduction Middlebrook 7H9 broth is a liquid growth medium first described in 1958 by Middlebrook and Cohn for the specialized cultivation of Mycobacterium species. It is widely used in clinical and research settings for rapid growth, biochemical testing, and preparing inocula for drug susceptibility testing …
Introduction Middlebrook OADC Growth Supplement is a vital enrichment used in microbiology to support the fastidious growth of Mycobacterium species. Its name is an acronym for its primary components: Oleic Acid, Albumin, Dextrose, and Catalase. OADC is a sterile liquid or lyophilized supplement designed to enhance the performance of Middlebrook media, such as 7H9 …
Introduction In microbiology and Tuberculosis (TB) diagnostics, PANTA is an antimicrobial supplement used to prevent the overgrowth of contaminating microorganisms in liquid culture media. It is primarily used with the BD BACTEC MGIT 960 system. PANTA is a selective antibiotic cocktail designed for the primary isolation of mycobacteria from …
Visual Observation Technical Interpretation The MGIT Principle: These tubes contain a fluorescent sensor embedded in silicon at the bottom. As the MTBC metabolizes nutrients, it consumes dissolved oxygen. MTBC Characteristics The “buff-colored” (off-white to light yellow) and granular appearance is highly indicative of the M. …
Introduction TrueNat is a rapid, chip-based, and portable molecular diagnostic test. It is developed by Molbio Diagnostics for the detection of tuberculosis (TB) and rifampicin (RIF) resistance. It is the first molecular point-of-care test for TB recommended by the World Health Organization (WHO). Principle The TrueNat system …
Introduction An Interferon-Gamma Release Assay (IGRA) is a modern blood test used to identify if a person is infected with Mycobacterium tuberculosis. It is primarily used to detect latent TB infection (LTBI) and to aid in the diagnosis of active tuberculosis disease. Principle The test is based on the fact …