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molecular systematics support the revival of mycobacterium salmoniphilum (ex ross 1960) sp. nov., nom. rev., a species closely related to mycobacterium chelonae.mycobacterial infections in fish are usually attributed to strains of mycobacterium marinum, mycobacterium chelonae and mycobacterium fortuitum. bacteria identified as m. chelonae have been isolated numerous times from salmonid fishes. recently, this bacterium has been associated with salmon mortalities in the aquaculture industry. an m. chelonae-like species from salmon, 'mycobacterium salmoniphilum', was described in 1960. however, the species name lost standing in nomenclature when it was omi ...200717978213
species of environmental mycobacteria differ in their abilities to grow in human, mouse, and carp macrophages and with regard to the presence of mycobacterial virulence genes, as observed by dna microarray hybridization.there are many species of environmental mycobacteria (em) that infect animals that are important to the economy and research and that also have zoonotic potential. the genomes of very few of these bacterial species have been sequenced, and little is known about the molecular mechanisms by which most of these opportunistic pathogens cause disease. in this study, 18 isolates of em isolated from fish and humans (including strains of mycobacterium avium, mycobacterium peregrinum, mycobacterium chelo ...200817981953
mycobacterium salmoniphilum infection in burbot lota lota.burbot lota lota sampled from lakes mjosa and losna in southeastern norway between 2005 and 2008 were found to be infected with mycobacterium salmoniphilum at a culture-positive prevalence of 18.6 and 3.3%, respectively. the condition factor (cf) of mycobacteria-affected fish sampled from mjøsa in 2008 was lower than the average cf of total sampled fish the same year. externally visible pathological changes included skin ulceration, petechiae, exopthalmia and cataract. internally, the infections ...201121797036
Mycobacterium salmoniphilum infection in farmed Atlantic salmon, Salmo salar L.Multiple greyish-white visceral nodules containing abundant rapidly growing and acid-fast bacteria, subsequently identified as Mycobacterium salmoniphilum, were detected in moribund and newly dead market-sized fish during a period of increased mortality in an Atlantic salmon, Salmo salar, farm in western Norway. Isolates cultured from diseased fish were phenotypically consistent with Mycobacterium sp. previously isolated from Atlantic salmon [MT 1890 (= NCIMB13533), MT1892, MT1900 and MT1901] in ...201121916902
mycobacterium saopaulense sp. nov., a rapidly growing mycobacterium closely related to members of the mycobacterium chelonae--mycobacterium abscessus group.five isolates of non-pigmented, rapidly growing mycobacteria were isolated from three patients and,in an earlier study, from zebrafish. phenotypic and molecular tests confirmed that these isolates belong to the mycobacterium chelonae-mycobacterium abscessus group, but they could not be confidently assigned to any known species of this group. phenotypic analysis and biochemical tests were not helpful for distinguishing these isolates from other members of the m. chelonae–m.abscessus group. the is ...201526358475
mycobacterium salmoniphilum infection in a farmed russian sturgeon, acipenser gueldenstaedtii (brandt & ratzeburg). 201423952784
characterization of mycobacterium salmoniphilum as causal agent of mycobacteriosis in atlantic salmon, salmo salar l., from a freshwater recirculation system.thirty atlantic salmon, salmo salar l., with low corporal condition relative to other fish present in the culture system, were sampled from a freshwater recirculation pisciculture located in chile. the most characteristic signs and lesions were cachexia and presence of multiple greyish-white granulomas within internal organs. the external and internal lesions, along with the microscopic, histologic and biochemical findings, were consistent with mycobacteriosis. the identification of mycobacteriu ...201423952471
high prevalence of infections and pathological changes in burbot (lota lota) from a polluted lake (lake mjøsa, norway).the aim of the present study was to investigate whether exposure to high levels of persistent organic pollutants (pops) affected a fish population in lake mjøsa. lake mjøsa is known to be contaminated by polybrominated diphenyl ethers (pbdes), a subgroup of brominated flame retardants from local industrial activities. fish from lake losna, a less contaminated lake located close to lake mjøsa, was used as reference (control). the sampling of burbot (lota lota) was carried out between 2005 and 200 ...201323149183
experimental mycobacteriosis in atlantic cod, gadus morhua l.piscine mycobacteriosis causes losses in a number of fish species both in the wild and in aquaculture worldwide. mycobacterium salmoniphilum infections have on several occasions been reported in farmed atlantic salmon, salmo salar l. the present study tested and confirmed the susceptibility of atlantic cod, gadus morhua l., an important yet relatively novel aquaculture species, to infection with m. salmoniphilum. atlantic cod injected intraperitoneally with a suspension of this bacterium were ma ...201222404316
mycobacterium stephanolepidis sp. nov., a rapidly growing species related to mycobacterium chelonae, isolated from marine teleost fish, stephanolepis cirrhifer.a previously undescribed rapidly growing, non-pigmented mycobacterium was identified based on biochemical and nucleic acid analyses, as well as growth characteristics. seven isolates were cultured from samples collected from five thread-sail filefish (stephanolepis cirrhifer) and two farmed black scraper (thamnaconus modestus). bacterial growth occurred at 15-35 °c on middlebrook 7h11 agar. the bacteria were positive for catalase activity at 68 °c and urease activity, intermediate for iron uptak ...201728857733
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