| diversity and phylogenetic affiliations of morphologically conspicuous large filamentous bacteria occurring in the pelagic zones of a broad spectrum of freshwater habitats. | filamentous bacteria with a conspicuous morphology were found in the majority of the bacterioplankton samples from a variety of freshwater habitats that were studied. these heterotrophic filaments typically account for < 1 to 11% of the total number of bacteria. the biovolume of this morphotype can exceed 40% of the biovolume for all bacteria. surprisingly, we found hardly any data on these morphologically conspicuous filaments in the literature. mixed cultures containing these filamentous bacte ... | 2005 | 15812022 |
| biocontrol of biomass bulking caused by haliscomenobacter hydrossis using a newly isolated lytic bacteriophage. | this research demonstrates the first ever application of lytic bacteriophage (virus) mediated biocontrol of biomass bulking in the activated sludge process using haliscomenobacter hydrossis as a model filamentous bacterium. bacteriophages are viruses that specifically infect bacteria only. the lytic phage specifically infecting h. hydrossis was isolated from the mixed liquor of a local wastewater treatment plant. the isolated bacteriophage belongs to the myoviridae family with a contractile tail ... | 2010 | 20950835 |
| identity, abundance and ecophysiology of filamentous bacteria belonging to the bacteroidetes present in activated sludge plants. | filamentous members of the bacteroidetes are commonly observed in activated sludge samples originating from both municipal and industrial wastewater treatment plants (wwtp), where they occasionally can cause bulking. several oligonucleotide 16s rrna-targeted probes were designed to target filaments with a needle-like appearance similar to haliscomenobacter hydrossis. the design of these probes was based on an isolate and a sequence obtained from a micromanipulated filament. the abundance of fila ... | 2008 | 18310034 |
| identification and ecophysiological characterization of epiphytic protein-hydrolyzing saprospiraceae ("candidatus epiflobacter" spp.) in activated sludge. | the identity and ecophysiology of a group of uncultured protein-hydrolyzing epiphytic rods attached to filamentous bacteria in activated sludge from nutrient removal plants were investigated by using the full-cycle rrna approach combined with microautoradiography and histochemical staining. the epiphytic group consists of three closely related clusters, each containing 11 to 16 clones. the closest related cultured isolate is the type strain haliscomenobacter hydrossis (atcc 27775) (<87% similari ... | 2008 | 18263744 |
| structure and function of the microbial community in a full-scale enhanced biological phosphorus removal plant. | the structure and function of the microbial community in a full-scale enhanced biological phosphorus removal wastewater treatment plant (wwtp; skagen) were investigated using the full-cycle rrna approach, combined with ecophysiological studies. a total of 87 16s rrna gene sequences were retrieved, and 78 operational taxonomic units were identified. novel oligonucleotide probes were designed, and quantitative fluorescence in situ hybridization revealed that six hitherto undescribed probe-defined ... | 2007 | 18048920 |
| lewinella agarilytica sp. nov., a novel marine bacterium of the phylum bacteroidetes, isolated from beach sediment. | a gram-negative, aerobic, light-orange-coloured, marine bacterium (designated sst-19(t)) was isolated from beach sediment in jeju, korea, and its taxonomic position was determined by means of a polyphasic approach. in a neighbour-joining phylogenetic tree based on 16s rrna gene sequences, strain sst-19(t) was positioned within the family 'saprospiraceae', class sphingobacteria, and formed a consistent cluster with lewinella persica atcc 23167(t) (94.7 % sequence similarity). the levels of 16s rr ... | 2007 | 18048730 |
| 'candidatus aquirestis calciphila' and 'candidatus haliscomenobacter calcifugiens', filamentous, planktonic bacteria inhabiting natural lakes. | filamentous bacteria frequently occurring in the pelagic zone of natural freshwater lakes and ponds were previously identified as being related to haliscomenobacter hydrossis based upon their 16s rrna gene sequences. these bacteria exhibit a specific morphology characterized by the formation of straight, stick-like filaments of variable length (5 to >100 microm) and quite stable, but narrow, width (0.25 to 0.35 microm). bacteria with these morphological characteristics form a monophyletic but br ... | 2007 | 17473236 |
| occurrence and control of filamentous bulking in aerated wastewater treatment plants of the french paper industry. | the occurrence of filamentous bacteria was investigated in 15 french pulp and paper activated sludge wastewater treatment plant (wwtp). large filamentous populations were present in most of the plants. identification carried out with conventional methods based on morphological features and staining techniques showed that the four main filamentous bacteria encountered in these industrial wwtp and responsible for bulking belong to the genera thiothrix sp., type 021 n, haliscomenobacter hydrossis a ... | 2004 | 15461396 |
| impact of the repetition of oxygen deficiencies on the filamentous bacteria proliferation in activated sludge. | cases of low stress can frequently occur in a wastewater treatment plant (wwtp). as they have no visible impact on the plant operation, they generally go unnoticed. nevertheless, it would appear that an accumulation of such cases can result in serious operational problems. the impact of the repeated application of oxygen deficiency on the proliferation of the filamentous bacteria sphaerotilus natans, haliscomenobacter hydrossis, eikelboom type 021n and thiothrix spp has been studied on wwtp pilo ... | 2003 | 12691883 |
| Bacteriophage-based biocontrol of biological sludge bulking in wastewater. | In a previous paper, the first ever application of lytic bacteriophage (virus)-mediated biocontrol of biomass bulking in the activated sludge process using Haliscomenobacter hydrossis as a model filamentous bacterium was demonstrated. In this work we extended the biocontrol application to another predominant filamentous bacterium, Sphaerotilus natans, notoriously known to cause filamentous bulking in wastewater treatment systems. Very similar to previous study, one lytic bacteriophage was isolat ... | 2011 | 21829092 |
| complete genome sequence of haliscomenobacter hydrossis type strain (o). | haliscomenobacter hydrossis van veen et al. 1973 is the type species of the genus haliscomenobacter, which belongs to order "sphingobacteriales". the species is of interest because of its isolated phylogenetic location in the tree of life, especially the so far genomically uncharted part of it, and because the organism grows in a thin, hardly visible hyaline sheath. members of the species were isolated from fresh water of lakes and from ditch water. the genome of h. hydrossis is the first comple ... | 2011 | 21886862 |
| [filamentous bacteria in activated sludge (bulking sludge). i. occurrence of filamentous bacteria in a sewage treatment plant working with the activated sludge process (plug flow system)]. | the occurrence of filamentous bacteria in activated sludge (bulking sludge) was investigated in the sewage treatment plant berlin-ruhleben. the studies were carried out in five periods from 26.10.1981 to 29.7.1982 (= 112 sampling days). it was noticed that filamentous bacteria appeared in the aeration tanks in different quantities and several kinds of species. with the identification key from eikelboom microthrix parvicella, type 021 n and type 0041 were frequently identified in all aeration tan ... | 1983 | 6670407 |
| phylogenetic heterogeneity within the genus herpetosiphon: transfer of the marine species herpetosiphon cohaerens, herpetosiphon nigricans and herpetosiphon persicus to the genus lewinella gen. nov. in the flexibacter-bacteroides-cytophaga phylum. | analysis of the 16s rdna sequences of species currently assigned to the genus herpetosiphon revealed intrageneric phylogenetic heterogeneity. the thermotolerant freshwater species herpetosiphon geysericola is most closely related to the type species herpetosiphon aurantiacus in the chloroflexus subdivision of the green non-sulfur bacteria. the marine species herpetosiphon cohaerens, herpetosiphon nigricans and herpetosiphon persicus, on the other hand, were found to form a cluster with sheathed ... | 1998 | 9734027 |
| influence of transient substrate overloads on the proliferation of filamentous bacterial populations in an activated sludge pilot plant. | using oligonucleotide probes directed at the rrna of filamentous bacteria, this study looks at the influence of the components of transient substrate overloads on the growth of the dominant filamentous bacteria of activated sludge fed by a synthetic substrate. by dissociating the massive input of organic matter from the oxygen shortage that the latter generally induces, it is revealed that each of these factors applied alone, induces only transitory, small-scale growth of the filaments nostocoid ... | 2001 | 11257866 |
| a partial phylogenetic analysis of the "flavobacter-bacteroides" phylum: basis for taxonomic restructuring. | on the basis of small subunit rrna sequence analyses five major subgroups within the flavobacteria-bacteroides phylum have been defined. these are tentatively designated the cytophaga subgroup (comprising largely cytophaga species), the flavobacter subgroup (comprising the true flavobacteria and the polyphyletic genus weeksella), the bacteroides subgroup (comprising the bacteroides and certain cytophaga-like bacteria), the sphingobacter subgroup (which contains the known sphingolipid-producing m ... | 1992 | 11541229 |
| 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 |
| pha storage from several substrates by different morphological types in an anoxic/aerobic sbr. | an activated sludge was cultivated on a mixture of several soluble substrates (acetate, ethanol, glucose, glutamic acid, peptone, tween 80, starch, yeast extract) in an anoxic/aerobic sbr. highly dynamic conditions in the sbr (feast famine regime) caused fast removal of most cod in the anoxic phase (in particular acetate, ethanol, glutamic acid and glucose were totally removed) and relevant contribution of storage. in spite of that, filament abundance was always high, as is typical of bulking sl ... | 2002 | 12216647 |
| investigations on the sheathed bacterium haliscomenobacter hydrossis gen.n., sp.n., isolated from activated sludge. | | 1973 | 4124107 |