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Mycobacterium Branderi
''Mycobacterium branderi'' is a slowly growing, nonchromogenic ''Mycobacterium'' first isolated from patients in Finland. Etymology Etymology ( ) is the study of the origin and evolution of words—including their constituent units of sound and meaning—across time. In the 21st century a subfield within linguistics, etymology has become a more rigorously scientific study. ...: of Brander, referring to Eljas Brander, the former head of the Tuberculosis Laboratory of the National Public Health Institute, Finland, who collected the strains. Description Microscopy *Acid-fast delicate slender rods that are often slightly curved, 1.2 to 3 um long. Colony characteristics *Colonies are nonchromogenic and produce smooth, often umbonate, off-white to grayish colonies on Middlebrook 7H11 agar. Physiology *Slowly growing, reaching full colony size after 2 to 3 weeks. *Growth is equally good at 37C and 45C and is only slightly delayed at 25C. *The type strain is negative for T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mycobacterium
''Mycobacterium'' is a genus of over 190 species in the phylum Actinomycetota, assigned its own family, Mycobacteriaceae. This genus includes pathogens known to cause serious diseases in mammals, including tuberculosis (''Mycobacterium tuberculosis, M. tuberculosis'') and leprosy (''Mycobacterium leprae, M. leprae'') in humans. The Greek language, Greek prefix ''myco-'' means 'fungus', alluding to this genus' Mold (fungus), mold-like colony surfaces. Since this genus has cell walls with a waxy lipid-rich outer layer containing high concentrations of mycolic acid, acid-fast staining is used to emphasize their resistance to acids, compared to other cell types. Mycobacterial species are generally aerobic, non-motile, and capable of growing with minimal nutrition. The genus is divided based on each species' pigment production and growth rate. While most ''Mycobacterium'' species are non-pathogenic, the genus' characteristic complex cell wall contributes to evasion from host defenses. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Etymology
Etymology ( ) is the study of the origin and evolution of words—including their constituent units of sound and meaning—across time. In the 21st century a subfield within linguistics, etymology has become a more rigorously scientific study. Most directly tied to historical linguistics, philology, and semiotics, it additionally draws upon comparative semantics, morphology, pragmatics, and phonetics in order to attempt a comprehensive and chronological catalogue of all meanings and changes that a word (and its related parts) carries throughout its history. The origin of any particular word is also known as its ''etymology''. For languages with a long written history, etymologists make use of texts, particularly texts about the language itself, to gather knowledge about how words were used during earlier periods, how they developed in meaning and form, or when and how they entered the language. Etymologists also apply the methods of comparative linguistics to reconstruct in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Middlebrook 7H11 Agar
Middlebrook 7H11 agar is identical to Middlebrook 7H10 agar, with an addition of pancreatic digest of casein to facilitate the growth of fastidious cultures of ''M. tuberculosis''. Mycobactin J may also be added to Middlebrook 7H11 agar to allow the recovery of ''M. genavense Mycobacterium genavense is a slow-growing species of the phylum Actinomycetota (Gram-positive bacteria with high G+C ratio, guanine and cytosine content, one of the dominant phyla of all bacteria), belonging to the genus ''Mycobacterium''. Desc ...''. See also * Lowenstein-Jensen medium * Middlebrook 7H9 broth References External links Middlebrook 7H11 Agar {{DEFAULTSORT:Middlebrook 7h11 Agar Microbiological media ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acid-fast Bacilli
Acid-fastness is a physical property of certain bacterial and Eukaryote, eukaryotic cell (biology), cells, as well as some Sub-cellular, sub-cellular structures, specifically their resistance to decolorization by acids during laboratory staining procedures. Once stained as part of a sample, these organisms can resist the acid and/or ethanol-based decolorization procedures common in many staining protocols, hence the name ''acid-fast''. The mechanisms of acid-fastness vary by species although the most well-known example is in the genus ''Mycobacterium'', which includes the species responsible for tuberculosis and leprosy. The acid-fastness of ''Mycobacteria'' is due to the high mycolic acid content of their cell walls, which is responsible for the staining pattern of poor absorption followed by high retention. Some bacteria may also be partially acid-fast, such as ''Nocardia''. Acid-fast organisms are difficult to characterize using standard microbiological techniques, though they ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nontuberculous Mycobacteria
Nontuberculous mycobacteria (NTM), also known as environmental mycobacteria, atypical mycobacteria and mycobacteria other than tuberculosis (MOTT), are mycobacteria which do not cause tuberculosis or leprosy/Hansen's disease. NTM can cause pulmonary diseases that resemble tuberculosis. Mycobacteriosis is any of these illnesses, usually meant to exclude tuberculosis. They occur in many animals, including humans, and are commonly found in soil and water. Introduction Mycobacteria are a family of small, rod-shaped bacilli that can be classified into three main groups for diagnosis and treatment: * ''Mycobacterium tuberculosis'' complex, which can cause tuberculosis: ''M. tuberculosis'', '' M. bovis'', '' M. africanum'', '' M. microti'' and '' M. canettii'' * ''M. leprae'' and '' M. lepromatosis'', which cause Hansen's disease, also called leprosy * Nontuberculous mycobacteria (NTM) are all the other mycobacteria that can cause pulmonary disease resembling tuberculosis, lymphadenitis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
