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Mycobacterium Botniense
''Mycobacterium botniense'' is a slowly growing ''Mycobacterium'', which produces a yellow pigment. It was first isolated from a stream of water. ''M. botniense'' is most closely related to ''Mycobacterium xenopi''. Etymology Etymology ()The New Oxford Dictionary of English (1998) – p. 633 "Etymology /ˌɛtɪˈmɒlədʒi/ the study of the class in words and the way their meanings have changed throughout time". is the study of the history of the Phonological chan ...: botniense; of Botnia, referring to the Latin name of the province of Finland from which the isolation was made. Description Microscopy *Gram-positive, nonmotile and acid-fast rods. Colony characteristics *Colonies on Löwenstein-Jensen media and on Middlebrook 7H11 agar are small, dysgonic and scotochromogenic, and produce yellow pigment. Physiology *Visible growth from diluted inocula requires 5 to 8 weeks. Growth occurs at 37 to 50 °C. *The type strain is positive for 10-d arylsulfatase and pyra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mycobacterium Xenopi
''Mycobacterium xenopi'' is a slow-growing scotochromogenic species of ''Mycobacterium''. It was first reported by Schwabacher in 1959, having been isolated in lesions found on a ''Xenopus laevis'', but the possibility of human infection was not confirmed until 1965. It has been cultured from hot and cold water taps, hospital hot water generators and storage tanks, and other environmental sources. It has low pathogenicity in humans, and where infections have been found they are closely associated with immunocompromised individuals, such as an extrapulmonary malignancy, alcoholism, diabetes mellitus, or immunosuppressive therapy. Pulmonary disease may be chronic, subacute, or acute; symptoms are indistinguishable from those associated with disease caused by ''M. kansasii''. Radiographic findings with ''M. xenopi'' pulmonary disease are variable but most often include upper lobe cavitary abnormalities similar to tuberculosis. On solid media, there is an egg next colony produced. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Etymology
Etymology ()The New Oxford Dictionary of English (1998) – p. 633 "Etymology /ˌɛtɪˈmɒlədʒi/ the study of the class in words and the way their meanings have changed throughout time". is the study of the history of the Phonological change, form of words and, by extension, the origin and evolution of their semantic meaning across time. It is a subfield of historical linguistics, and draws upon comparative semantics, Morphology_(linguistics), morphology, semiotics, and phonetics. For languages with a long recorded history, written history, etymologists make use of texts, and texts about the language, to gather knowledge about how words were used during earlier periods, how they developed in Semantics, meaning and Phonological change, form, or when and how they Loanword, entered the language. Etymologists also apply the methods of comparative linguistics to reconstruct information about forms that are too old for any direct information to be available. By analyzing related ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Middlebrook 7H11 Agar
Middlebrook 7H11 agar is identical to Middlebrook 7H10 Agar, Middlebrook 7H10 agar, with an addition of pancreatic digest of casein to facilitate the growth of fastidious cultures of ''M. tuberculosis''. Mycobactin, Mycobactin J may also be added to Middlebrook 7H11 agar to allow the recovery of ''M. genavense''. See also * Lowenstein-Jensen medium * Middlebrook 7H9 Broth, 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 eukaryotic cells, as well as some 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 can be stained using concentrated dyes, ... [...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 (also known as Hansen's disease). NTM do 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 the purpose of diagnosis and treatment: * ''Mycobacterium tuberculosis'' complex, which can cause tuberculosis: '' M. tuberculosis'', '' M. bovis'', '' M. africanum'', '' M. microti'' and '' M. canetti'' * '' 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 resemblin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
