Related Research Articles
Proteobacteria is a major phylum of Gram-negative bacteria. They include a wide variety of pathogenic genera, such as Escherichia, Salmonella, Vibrio, Helicobacter, Yersinia, Legionellales, and many others. Others are free-living (nonparasitic) and include many of the bacteria responsible for nitrogen fixation.
Flavobacterium is a genus of Gram-negative, nonmotile and motile, rod-shaped bacteria that consists of 130 recognized species. Flavobacteria are found in soil and fresh water in a variety of environments. Several species are known to cause disease in freshwater fish.
The Chloroflexi or Chlorobacteria are a phylum of bacteria containing isolates with a diversity of phenotypes, including members that are aerobic thermophiles, which use oxygen and grow well in high temperatures; anoxygenic phototrophs, which use light for photosynthesis ; and anaerobic halorespirers, which uses halogenated organics as electron acceptors.
Porphyromonas is a Gram-negative, non-spore-forming, obligately anaerobic and non-motile genus from the family of Porphyromonadaceae. This genus has been found to be part of the salivary microbiome. The use of targeted 16S rRNA gene metagenomic sequencing has shown that the genus is well represented in healthy individuals from the Human Microbiome Project.
Thermoanaerobacter kivui is a thermophilic, anaerobic, non-spore-forming species of bacteria.
The species of the genus Aquabacterium are motile, rod-shaped, Gram-negative, oxidase-positive, catalase-negative bacteria which were isolated from drinking water biofilms in Berlin. Identified species include Aquabacterium citratiphilum, Aquabacterium parvum, and Aquabacterium commune. Three bacterial strains isolated from biofilms of the Berlin drinking water system were characterized with respect to their morphological and physiological properties and their taxonomic position. Phenotypically, the bacteria investigated were motile, Gram-negative rods, oxidase-positive and catalase-negative, and contained polyalkanoates and polyphosphate as storage polymers. They displayed a microaerophilic growth behaviour and used oxygen and nitrate as electron acceptors, but not nitrite, chlorate, sulfate, or ferric iron. The substrates metabolized included a broad range of organic acids, but no carbohydrates at all. The three species can be distinguished from each other by their substrate use, ability to hydrolyse urea and casein, cellular protein patterns, and growth on nutrient-rich media, as well as their temperature, pH, and NaCl tolerances. Phylogenetic analysis, based on 16S rRNA gene sequence comparison, revealed that the isolates are affiliated to the beta 1-subclass of Proteobacteria. The isolates constitute three new species with internal levels of DNA relatedness ranging from 44.9 to 51.3%. It is proposed that a new genus, Aquabacterium gen. nov., should be created, including Aquabacterium citratiphilum sp. nov., Aquabacterium parvum sp. nov., and Aquabacterium commune sp. nov. The type species of the new genus is Aquabacterium commune.
Psychrobacter is a genus of Gram-negative, osmotolerant, oxidase-positive, psychrophilic or psychrotolerant, aerobic bacteria which belong to the family Moraxellaceae and the class Gammaproteobacteria. The shape is typically cocci or coccobacilli. Some of those bacteria were isolated from humans and can cause humans infections such as endocarditis and peritonitis. This genus of bacteria is able to grow at temperatures between −10 and 42 °C. Rudi Rossau found through DNA-rRNA hybridization analysis that Psychrobacter belongs to the Moraxellaceae. The first species was described by Juni and Heym. Psychrobacter occur in wide range of moist, cold saline habitats, but they also occur in warm and slightly saline habitats.
Enhydrobacter aerosaccus is a gram negative, catalase- and oxidase-positive, non motile bacterium which contains gas vacuoles from the genus of Enhydrobacter which was isolated from the Wintergreen Lake in Michigan.
Virgibacillus is a genus of Gram-positive, rod-shaped (bacillus) bacteria and a member of the phylum Firmicutes. Virgibacillus species can be obligate aerobes, or facultative anaerobes and catalase enzyme positive. Under stressful environmental conditions, the bacteria can produce oval or ellipsoidal endospores in terminal, or sometimes subterminal, swollen sporangia. The genus was recently reclassified from the genus Bacillus in 1998 following an analysis of the species V. pantothenticus. Subsequently, a number of new species have been discovered or reclassified as Virgibacillus species.
Microvirgula aerodenitrificans is a species of bacteria, the only species in its genus. It is a Gram-negative, catalase-and oxidase-positive, curved rod-shaped and motile denitrifier. It is aerobic as well as an anoxic heterotroph, having an atypical respiratory type of metabolism in which oxygen and nitrogen oxides are used simultaneously as terminal electron acceptors. SGLY2T is its type strain.
Hyphomicrobium is a genus of Gram-negative, non-spore-forming, rod-shaped bacteria from the family of Hyphomicrobiaceae. It has a large polar or sub-polar filiform prostheca very similar to that of Caulobacter. In addition to having a nutritional function, the prostheca also plays a role in the initiation of DNA replication.
Rhodobium orientis is a phototrophic, Gram-negative, rod-shaped and motile bacterium species from the genus of Rhodobium which has been isolated from coastal seawater from Makurazaki in Japan.
Methylopila capsulata is a Gram-negative, aerobic, facultatively methylotrophic, non-spore-forming and motile bacterium species from the genus of Methylopila which has been isolated from soil from Tashkent in Uzbekistan.
Laribacter is a bacterial genus in the family of Neisseriaceae. Laribacter hongkongensis is the only species in the genus, and it has been isolated from human cases of diarrhea. However, its role in causing diarrhea is unproven, even though it has been hypothesized.
Sphingomonas aerolata is a Gram-negative and psychrotolerant bacteria from the genus of Sphingomonas.
Sphingomonas aurantiaca is a Gram-negative and psychrotolerant bacteria from the genus of Sphingomonas which has been isolated from indoor dusts from animal sheds in Finland.
Aquaspirillum dispar is a species of Aquaspirillum that is also known as Microvirgula aerodenitrificans Patureau.
Erythromicrobium is a Gram-negative and pleomorphic genus from the family of Sphingomonadaceae which produces bacteriochlorophyll A and carotenoid.
Dysgonomonas is a Gram-negative and facultatively anaerobic genus from the family of Dysgonamonadaceae which have been isolated from human sources. Dysgonomonas bacteria can cause gastroenteritis in immunocompromised persons
Polaribacter is a Gram-negative, heterotrophic, psychrophilic or mesophilic and aerobic bacteria genus from the family of Flavobacteriaceae.
