| family spirosomaceae: gram-negative ring-forming aerobic bacteria. | the bacteria having a unique ring-like morphology first isolated from nasal mucus by weibel in 1887 were classified as a new genus spirosoma by migula in 1894. however, because these bacteria were not completely described for taxonomic purposes and their cultures were no longer available, the genus was deleted from the bergey's manual of determinative bacteriology, 6th edition, 1948. orskov (1928) created a new genus "microcyclus" (a name that has been found to be illegitimate and replaced with ... | 1990 | 2248690 |
| [high resistance of some oligotrophic bacteria to ionizing radiation]. | the resistance against ionizing radiation of seven cultures of oligotrophic and eutrophic bacteria was investigated in the interval 0-360 gr/h. it is determine that all of tested bacteria are distributed into three groups according to the lever of their resistance. most resistant were: methylobacterium organophilum, pedodermatophilus halotolerans (ld50 = 270 cr/h). these organisms are close to deinococcus radiodurans in the survival. middle resistance shown water-born ring-forming bacteria flect ... | 1993 | 8114644 |
| purification and some properties of a novel racemase, which racemizes 2-oxothiazolidine-4-carboxylic acid and 5-oxoproline, from flectobacillus sp. strain b-1. | a novel racemase active toward 2-oxothiazolidine-4-carboxylic acid was purified 310-fold with 5% recovery to near homogeneity from a crude extract of flectobacillus sp. b-1, which had been isolated as a bacterium being able to assimilate (s)-2-oxothiazolidine-4-carboxylic acid. the molecular weight was estimated to be 92,000 by gel filtration. the purified preparation migrated as a single band of molecular weight 49,000 upon sds-polyacrylamide gel electrophoresis. the enzyme exhibited maximum ac ... | 1994 | 8186229 |
| polaribacter gen. nov., with three new species, p. irgensii sp. nov., p. franzmannii sp. nov. and p. filamentus sp. nov., gas vacuolate polar marine bacteria of the cytophaga-flavobacterium-bacteroides group and reclassification of 'flectobacillus glomeratus' as polaribacter glomeratus comb. nov. | several psychrophilic, gas vacuolate strains of the cytophage-flavobacterium-bacteroides (cfb) phylogenetic group were isolated from sea ice and water from the arctic and the antarctic. the closest taxonomically defined species by 16s rrna sequence analysis is 'flectobacillus glomeratus'. however, 'flc. glomeratus' is phylogenetically distant from the flectobacillus type species, flc. major. on the basis of phenotypic, genotypic and 16s rrna sequence analyses we propose a new genus, polaribacter ... | 1998 | 9542092 |
| [element composition of bacterial cells of various taxa]. | the elemental compositions of cells of representatives of five bacterial genera (hyphomonas vulgare np-160, caulobacter bacteroides np-105, flectobacillus major mm, escherichia coli, and spirulina platensis) was studied by electron microscopic x-ray microanalysis. the contents of p, s, cl, k, and ca were determined. the bacterial species studied in this work substantially differ by the contents of these elements. a high content of k is typical of s. platensis, whereas f. major, an aquatic form, ... | 1998 | 9567294 |
| bacterial filament formation, a defense mechanism against flagellate grazing, is growth rate controlled in bacteria of different phyla. | a facultatively filamentous bacterium was isolated from eutrophic lake water and was identified as flectobacillus sp. strain mwh38 (a member of the cytophaga-flavobacterium-bacteroides phylum) by comparative 16s rrna gene sequence analysis. filament formation by flectobacillus sp. strain mwh38 and filament formation by flectobacillus major, the closest known relative of strain mwh38, were studied in chemostat cultures under grazing pressure by the bacterivorous flagellate ochromonas sp. strain d ... | 1999 | 9872755 |
| a novel glycosphingolipid from gram-negative aquatic bacteria. | the chloroform-methanol extractable lipids of the gram-negative fresh-water bacteria arcocella aquatica no-502 and flectobacillus major fm were found to contain an unusual ninhydrin-positive glycolipid. it was purified by two-stage silica gel-column chromatography. by the use of ir and (1)h-nmr spectroscopy, mass spectrometry and chemical-degradation experiment, the lipid was established to be 1-o-monoglycosyl ceramide, the carbohydrate moiety of which was the alpha-pyranose-ring form of 7-desox ... | 1999 | 10521700 |
| the polar-lipid composition of the sphingolipid-producing bacterium flectobacillus major. | polar lipids comprise about 90% of the total chloroform-methanol extractable lipids of the gram-negative, fresh-water, ring-forming bacterium flectobacillus major fm and consist of at least 10 constituents. these are aminophosphosphingolipids, 2-n-(2'-d-hydroxy-13'-methyltetradecanoyl)-15-methyl-4(e)-hexad ecasph ingenyl-1-phosphoethanolamine (36.8% of the total polar lipids) and its 2'-deoxy derivative (3.7%); sulfonic-acid analogues of ceramide, 2-d-(2'-d-hydroxy-13'-methyltetradecanoyl)amino- ... | 2000 | 10760472 |
| changes in bacterial community composition and dynamics and viral mortality rates associated with enhanced flagellate grazing in a mesoeutrophic reservoir. | bacterioplankton from a meso-eutrophic dam reservoir was size fractionated to reduce (<0.8-microm treatment) or enhance (<5-microm treatment) protistan grazing and then incubated in situ for 96 h in dialysis bags. time course samples were taken from the bags and the reservoir to estimate bacterial abundance, mean cell volume, production, protistan grazing, viral abundance, and frequency of visibly infected cells. shifts in bacterial community composition (bcc) were examined by denaturing gradien ... | 2001 | 11375187 |
| polyamine distribution profiles in the eighteen genera phylogenetically located within the flavobacterium-flexibacter-cytophaga complex. | cellular polyamines of eighteen genera belonging to the flavobacterium-flexibacter-cytophaga complex were analysed by ion exchange liquid chromatography. homospermidine was the major polyamine in the genera bergeyella, riemerella, ornithobacterium, weeksella, capnocytophaga, polaribacter and psychroflexus belonging to the family flavobacteriaceae. in the family spirosomaceae, runella, spirosoma and flectobacillus species contained spermidine whereas cyclobacterium species contained homospermidin ... | 2001 | 11491527 |
| phylogenetic placement of the spirosomaceae. | comparative analysis of 16s rrna sequences shows that the family spirosomaceae belongs within the eubacterial phylum defined by the flavobacteria and bacteriodes. its constituent genera, spirosoma, flectobacillus, and runella form a monophyletic grouping therein. the phylogenetic assignment is based not only upon evolutionary distance analysis, but also upon sequence signatures and higher order structural synapomorphies in 16s rrna. another genus peripherally associated with the spirosomaceae ... | 1990 | 11538307 |
| direct and indirect effects of protist predation on population size structure of a bacterial strain with high phenotypic plasticity. | we studied the impact of grazing and substrate supply on the size structure of a freshwater bacterial strain (flectobacillus sp.) which showed pronounced morphological plasticity. the cell length varied from 2 to >40 microm and encompassed rods, curved cells, and long filaments. without grazers and with a sufficient substrate supply, bacteria grew mainly in the form of medium-sized rods (4 to 7 microm), with a smaller proportion (<10%) of filamentous forms. grazing experiments with the bacterivo ... | 2006 | 16391028 |
| flectobacillus lacus sp. nov., isolated from a highly eutrophic pond in korea. | a gram-negative, almost straight, rod-shaped, non-motile bacterium, designated cl-gp79(t), was isolated from a highly eutrophic pond located within the campus of seoul national university, korea. phylogenetic analyses based on 16s rrna gene sequencing showed that strain cl-gp79(t) belongs to the family flexibacteraceae, with flectobacillus major as its closest relative (similarity of 95.7 %). the cellular fatty acids consist mainly of c(16 : 1)omega5c (mean +/- sd, 26.9 +/- 10.8 %), iso-c(15 : 0 ... | 2006 | 16738091 |
| effects of nutrient availability and ochromonas sp. predation on size and composition of a simplified aquatic bacterial community. | predation and competition are two main factors that determine the size and composition of aquatic bacterial populations. using a simplified bacterial community, composed of three strains characterized by different responses to predation, a short-term laboratory experiment was performed to evaluate adaptations and relative success in communities with experimentally controlled levels of predation and nutrient availability. a strain with a short generation time (pseudomonas putida), one with high p ... | 2006 | 17117980 |
| synergistic and antagonistic effects of viral lysis and protistan grazing on bacterial biomass, production and diversity. | in a mesotrophic reservoir, we examined the effects on the bacterioplankton of distinct consumers of bacteria, viruses and heterotrophic nanoflagellates, both alone and combined in an experiment using natural populations and in situ incubations in dialysis bags. ribosomal rna-targeted probes were employed as well as 16s rna gene based pcr denaturing gradient gel electrophoresis (dgge) to enumerate bacterial groups and assess bacterial community composition. we employed probes for actinobacteria ... | 2007 | 17298376 |
| grazer and virus-induced mortality of bacterioplankton accelerates development of flectobacillus populations in a freshwater community. | we present a detailed analysis of the effects of distinct bacterial mortality factors, viral lysis and heterotrophic nanoflagellates (hnf) bacterivory, associated with the development of filamentous flectobacillus populations. reservoir bacterioplankton communities were subjected to additions of both hnf and viruses together, or hnf alone, and then incubated in situ in dialyses bags. for distinct bacterial groups, mortality or growth stimulation was analysed by examining bacterial prey ingested ... | 2007 | 17298377 |
| unique diversity of carotenoid-producing bacteria isolated from misasa, a radioactive site in japan. | we obtained carotenoid-producing microorganisms at a high frequency from water samples collected at misasa (tottori, japan), a region known for its high natural radioactivity content. a comprehensive 16s rrna gene-based phylogenetic analysis revealed that the 104 potential carotenoid producers isolated from misasa could be classified into 38 different species belonging to seven bacterial classes (flavobacteria, sphingobacteria, alpha-proteobacteria, gamma-proteobacteria, deinococci, actinobacter ... | 2007 | 17828533 |
| identification of pink-pigmented bacteria isolated from environmental water samples and their biofilm formation abilities. | sixty-seven strains of pink-pigmented bacteria, which were isolated from environmental water samples collected nationwide, were identified by partial 16s rdna sequence analysis. in addition, the biofilm formation ability of the isolates was experimentally investigated. we could identify only 2 strains at the species level: pedobacter roseus hs-38 and runella slithyformis hs-77. the results showed that of the strains tested, 22 strains (32.8%) were pedobacter spp., which was most frequently ident ... | 2008 | 18661678 |
| flectobacillus roseus sp. nov., isolated from freshwater in taiwan. | two gram-negative, aerobic, pale pink/rose-coloured, rod-shaped, non-motile bacterial strains, designated gfa-11(t) and rg-4, were isolated from a freshwater fish culture pond and a freshwater spring sample, respectively. based on characterization by using a polyphasic approach, the two strains showed highly similar phenotypic, physiological and genetic characteristics. they shared 99.9 % 16s rrna gene sequence similarity and 89-94 % dna-dna relatedness, suggesting that they represent a single g ... | 2009 | 19622645 |
| antibiotic effects of three strains of chrysophytes (ochromonas, poterioochromonas) on freshwater bacterial isolates. | we investigated the antibiotic effects of extracts of freeze-dried biomass and culture supernatants from the mixotrophic chrysophyte species ochromonas danica, poterioochromonas sp. strain ds, and poterioochromonas malhamensis on bacterial strains isolated from lake water. methanolic biomass extracts inhibited the growth of all tested strains, albeit to a different extent, whereas aqueous biomass extracts only affected bacteria of the genus flectobacillus. the antibiotic action of supernatants f ... | 2010 | 19919604 |
| [vaginal microflora and relevant factors in puerperium]. | to find out the bacterial species in the vagina of postpartum women and the possible influencing factors on colonization. | 2009 | 19957547 |
| siphonobacter aquaeclarae gen. nov., sp. nov., a novel member of the family 'flexibacteraceae', phylum bacteroidetes. | a gram-negative bacterium, designated p2(t), was isolated from the biofilm developed on the inner surface of an ultrapure cooling water system in a hungarian power plant and was characterized by a polyphasic approach. phylogenetic analysis based on 16s rrna gene sequences revealed that strain p2(t) was affiliated with the family 'flexibacteraceae' in the phylum bacteroidetes. its closest relative was flectobacillus lacus cl-gp79(t) (88.7 % 16s rrna gene sequence similarity) followed by arcicella ... | 2010 | 20008110 |
| assessing niche separation among coexisting limnohabitans strains through interactions with a competitor, viruses, and a bacterivore. | we investigated potential niche separation in two closely related (99.1% 16s rrna gene sequence similarity) syntopic bacterial strains affiliated with the r-bt065 cluster, which represents a subgroup of the genus limnohabitans. the two strains, designated b4 and d5, were isolated concurrently from a freshwater reservoir. differences between the strains were examined through monitoring interactions with a bacterial competitor, flectobacillus sp. (fl), and virus- and predator-induced mortality. ba ... | 2010 | 20038688 |
| Proposal of Pseudarcicella hirudinis gen. nov., sp. nov., isolated from the skin of the medical leech Hirudo medicinalis. | A pinkish pigmented, Gram-negative, rod-shaped, non-spore-forming bacterium (strain E92T), was isolated from the skin of the medical leech Hirudo medicinalis , on R2A Agar The 16S rRNA gene sequence analysis of strain E92T showed a relatively low (93.0 - 93.5%) to representatives of the genus Arcicella and 91.5% - 92.0% to members of the genus Flectobacillus. The polar lipid profile was composed of the major compounds phosphatidylethanolamine, an unidentified aminophospholipid, an unidentified ... | 2011 | 22081719 |