What stain is used for Mycobacterium tuberculosis?
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These microimmunodiffusion tests appear to be specific for Mycobacterium tuberculosis. | |
30 Citations | We present a sensitive and specific assay for reliable and flexible detection of members of the Mycobacterium tuberculosis complex (MTBC) in clinical samples. |
This test proved to be a useful tool to help rule out the diagnosis of active Mycobacterium tuberculosis infection and could therefore prevent unnecessary or inappropriate therapy. | |
The described methods can be used to demonstrate and quantify certain species of Mycobacterium, including M. tuberculosis, in clinical or environmental samples. | |
15 Citations | The reported technology could be useful in the diagnostic investigation of Mycobacterium tuberculosis and other human pathogens in clinical specimens. |
27 Citations | The results showed that replacing smear microscopy with the Xpert MTB/RIF assay facilitates laboratory handling and improves the sensitivity and specificity of Mycobacterium tuberculosis detection. |
In order to carry out the right treatment and epidemiologic evaluation, it is important to identify non-tuberculosis mycobacterium by culture methods. |
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What new diagnostic tools can be developed to improve the detection of drug-resistant strains of Mycobacterium tuberculosis?4 answersNew diagnostic tools can be developed to improve the detection of drug-resistant strains of Mycobacterium tuberculosis. One approach is the use of multiplexed, targeted next generation sequencing (tNGS) assays that can predict drug resistance (DR) directly from clinical respiratory specimens. Another potential tool is metabolomics, which can identify metabolite markers to detect pre-extensively drug-resistant (pre-XDR) and extensively drug-resistant tuberculosis (XDR-TB). Additionally, reference graphs can be used to represent genetic variation within a bacterial population, allowing for the prediction of drug resistance in bacteria like M. tuberculosis. These tools offer the potential for faster and more accurate detection of drug-resistant strains, enabling timely and appropriate treatment for patients with drug-resistant tuberculosis.
What are stain types and characteristics?5 answersStains used in cytological and histological analysis can be categorized into different types based on their characteristics. Some stains are nonspecific and can detect a spectrum of organisms, while others are specific for a particular organism. Nonspecific stains like the Papanicolaou stain and silver impregnation methods can detect a wide range of organisms, while acid-fast techniques can detect only a limited group of organisms. Special stains are essential in routine laboratory works and can be used to demonstrate various cellular products for diagnosis, identify microbial organisms, and estimate DNA and RNA content of cells. Stains can also be used to contrast the nuclear portion of cells from the cytoplasmic portion, and systems and methods for illuminating cytological samples can be employed. Additionally, stains can be used in wood finishing, with water stains, oil stains, and spirit stains being the three main types used for staining wood.
How does methylene blue stain bacteria?5 answersMethylene blue stains bacteria by using a primary stain that does not require heating and a decolorizing counter-stain that does not require a separate acid or alcohol decolorization step. The primary stain includes basic fuchsin, ethyl alcohol, isopropyl alcohol, phenol, and water, while the counter-stain includes methylene blue, ethyl alcohol, potassium hydroxide, glycerol, glacial acetic acid, polyvinylpyrrolidone, and water. Another method of staining bacteria involves a mixture of methylene blue and eosin Y, which gives a deep staining of bacteria at pH 3 and above. This mixture can be successfully used at a pH-value as low as 0.8 and is sensitive enough to detect differences in the isoelectric points of bacteria. Methylene blue has also been found to impair the repair activity of the polymerase 1 enzyme in Escherichia coli cells, sensitizing these bacteria to the lethal effects of ionizing radiation.
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