Publications

heterogenic response of prokaryotes toward silver nanoparticles and ions is facilitated by phenotypes and attachment of silver aggregates to cell surfaces.	tons of anthropogenic silver nanoparticles (agnps) are assumed to be released into the environment due to their use in many consumer products. agnps are known to be toxic toward microorganisms and thus may harm their specific functions in ecosystems. here we explore the impact of agnps on functioning of single cells in microbial populations at doses typically found in anthropogenic environments. the response of single cells to agnps was analyzed by flow cytometry and using the fluorescent dyes p ...	2017	28110496
metarhizium brunneum - an enzootic wireworm disease and evidence for its suppression by bacterial symbionts.	wireworms (coleoptera: elateridae) are serious agricultural pests, with soil-dwelling larvae attacking subterranean tissues of crop plants and their fruit when in contact with the soil surface. researchers collect wireworms for laboratory experiments to study their behaviour and test pest control agents but frequently lose them to metarhizium petch (ascomycota: hypocreales: clavicipitaceae) infection. we found latent m. brunneum infection in 13-100% of live, asymptomatic agriotes obscurus and a. ...	2017	28919016
a catheter-related bloodstream infection with mycobacterium frederiksbergense in an immunocompromised child.	we report a case of a catheter-related bloodstream infection with mycobacterium frederiksbergense in an immunocompromised child with acute lymphoblastic leukemia. nontuberculous mycobacteria have been implicated in central venous catheter infections in immunosuppressed individuals, however, to our knowledge this is the first reported case of invasive infection with this organism.	2015	25259934
bacterial community of biofilms developed under different water supply conditions in a distribution system.	in order to understand the bacterial community characteristics of biofilms developed under different finished water supply histories in drinking water distribution systems (dwds), biofilm samples on different type of iron corrosion scales in a real dwds were collected and systematically investigated using 454 pyrosequencing of 16s rrna gene. the richness and diversity estimators showed that biofilms formed in dwds transporting finished groundwater (gw) had the lowest level of bacterial diversity ...	2014	24291134
isothermal titration calorimetry - a new method for the quantification of microbial degradation of trace pollutants.	the environmental fate and, in particular, biodegradation rates of hydrophobic organic compounds (hoc) are of high interest due to the ubiquity, persistence, and potential health effects of these compounds. hoc tend to interact with bioreactor materials and sampling devices and are frequently volatile, so that conventionally derived degradation parameters are often biased. we report on the development and validation of a novel calorimetric approach that serves to gain real time information on th ...	2010	20385177
clinical management of rapidly growing mycobacterial cutaneous infections in patients after mesotherapy.	increasing numbers of patients are expressing an interest in mesotherapy as a method of reducing body fat. cutaneous infections due to rapidly growing mycobacteria are a common complication of such procedures.	2009	19814609
biodegradation of pyrene by mycobacterium frederiksbergense in a two-phase partitioning bioreactor system.	biodegradation of pyrene by mycobacterium frederiksbergense was studied in a two-phase partitioning bioreactor (tppb) using silicone oil as non-aqueous phase liquid (napl). the tppb achieved complete biodegradation of pyrene; and during the active degradation phase, utilization rates of 270, 230, 139, 82 mg l(-1)d(-1) for initial pyrene loading concentrations (in napl) of 1000, 600, 400 and 200 mg l(-1), respectively, were obtained. the degradation rates achieved using m. frederiksbergense in tp ...	2008	17624769
identification of yellow-pigmented bacteria isolated from hospital tap water in japan and their chlorine resistance.	twenty-five yellow chromogenic strains isolated from hospital tap water samples collected nationwide were identified by partial 16s rdna sequencing. in addition, the chlorine resistance of the isolates was experimentally investigated. the results showed that of the strains tested, 12 strains (48.0%) were sphingomonas ursincola/natatoria, which was most frequently identified, followed by 2 strains (8.0%) of mycobacterium frederiksbergense and 1 strain (4.0%) each of sphingomonas adhaesiva, sphing ...	2007	17629244
limits of propidium iodide as a cell viability indicator for environmental bacteria.	viability measurements of individual bacteria are applied in various scopes of research and industry using approaches where propidium iodide (pi) serves as dead cell indicator. the reliability of pi uptake as a cell viability indicator for dead (pi permeable) and viable (pi impermeable) bacteria was tested using two soil bacteria, the gram(-) sphingomonas sp. lb126 and the gram(+) mycobacterium frederiksbergense lb501t.	2007	17421025
acetylation and nitrosation of ciprofloxacin by environmental strains of mycobacteria.	to determine the ability of environmental bacteria to metabolize the frequently prescribed fluoroquinolone drug ciprofloxacin, eight mycobacterium spp. cultures were grown for 4 days in a medium containing sorbitol and yeast extract with 100 mg x l(-1) ciprofloxacin. after the cultures had been centrifuged and the supernatants extracted with ethyl acetate, two metabolites were purified by using high-performance liquid chromatography. they were identified with liquid chromatography/electrospray i ...	2007	17496960
isolation and identification of mycobacteria from soils at an illegal dumping site and landfills in japan.	in order to study the diversity and community of genus mycobacterium in polluted soils, we tried to isolate mycobacteria from 11 soil samples collected from an illegal dumping site and 3 landfills in japan. using culture methods with or without acanthamoeba culbertsoni, a total of 19 isolates of mycobacteria were obtained from 5 soil samples and 3 of them were isolated only by the co-culture method with the amoeba. conventional biochemical tests and sequencing of the hsp65, rpob, and 16s rrna ge ...	2006	16858142
taking the fungal highway: mobilization of pollutant-degrading bacteria by fungi.	the capacity of fungi to serve as vectors for the dispersion of pollutant-degrading bacteria was analyzed in laboratory model systems mimicking water-saturated (agar surfaces) and unsaturated soil environments (glass-bead-filled columns). two common soil fungi (fusarium oxysporum and rhexocercosporidium sp.) forming hydrophilic and hydrophobic mycelia, respectively, and three polycyclic aromatic hydrocarbon degrading bacteria (achromobacter sp. sk1, mycobacterium frederiksbergense lb501tg, and s ...	2005	16047804
occurrence and community composition of fast-growing mycobacterium in soils contaminated with polycyclic aromatic hydrocarbons.	fast-growing mycobacteria are considered essential members of the polycyclic aromatic hydrocarbons (pah) degrading bacterial community in pah-contaminated soils. to study the natural role and diversity of the mycobacterium community in contaminated soils, a culture-independent fingerprinting method based on pcr combined with denaturing gradient gel electrophoresis (dgge) was developed. new pcr primers were selected which specifically targeted the 16s rrna genes of fast-growing mycobacteria, and ...	2005	16329885
electrokinetic transport of pah-degrading bacteria in model aquifers and soil.	an investigation of the mobility, viability, and activity of polycyclic aromatic hydrocarbon (pah) degrading bacteria in an electric field is presented. bench-scale model aquifers were used to test electrophoresis and electroosmosis as potential mechanisms for bacterial dispersion in contaminated sites. glass beads, alluvial sand from lake geneva, and historically polluted clayey soil were used as packing materials. the green-fluorescent protein labeled pah-degrading bacteria sphingomonas sp. l1 ...	2004	15461168
mycobacterium cosmeticum sp. nov., a novel rapidly growing species isolated from a cosmetic infection and from a nail salon.	four isolates of a rapidly growing mycobacterium species had a mycolic acid pattern similar to that of mycobacterium smegmatis, as determined by hplc analyses. three of the isolates were from footbath drains and a sink at a nail salon located in atlanta, ga, usa; the fourth was obtained from a granulomatous subdermal lesion of a female patient in venezuela who was undergoing mesotherapy. by random amplified polymorphic dna electrophoresis and pfge of large restriction fragments, the three isolat ...	2004	15545488
characterization of multiple-substrate utilization by anthracene-degrading mycobacterium frederiksbergense lb501t.	stable carbon isotope analysis of biomass and analyses of phospholipid fatty acids (plfa), glycolipid fatty acids (glfa), and mycolic acids were used to characterize mixed-substrate utilization by mycobacterium frederiksbergense lb501t under various substrate regimens. the distinct (13)c contents of anthracene and glucose as representatives of typical hydrophobic pollutants and naturally occurring organic compounds, respectively, were monitored during formation into biomass and used to quantify ...	2003	14532072
mycobacterium frederiksbergense sp. nov., a novel polycyclic aromatic hydrocarbon-degrading mycobacterium species.	a polycyclic aromatic hydrocarbon-degrading bacterium isolated from coal tar-contaminated soil in denmark was characterized by a polyphasic approach. phylogenetically and chemotaxonomically, it was related to members of the genus mycobacterium. the isolate contains chemotaxonomic markers that are diagnostic for the genus mycobacterium; i.e. the meso isomer of 2,6-diaminopimelic acid, arabinose and galactose as diagnostic whole-cell sugars, mk-9(h2) as the principal isoprenoid quinone, a mycolic ...	2001	11594601