Enterobacter is a genus of common Gram-negative, facultatively anaerobic, rod-shaped, non-spore-forming bacteria of the family Enterobacteriaceae. Cultures are found in soil, water, sewage, feces and gut environments. It is the type genus of the order Enterobacterales. Several strains of these bacteria are pathogenic and cause opportunistic infections in immunocompromised hosts and in those who are on mechanical ventilation. The urinary and respiratory tracts are the most common sites of infection. The genus Enterobacter is a member of the coliform group of bacteria. It does not belong to the fecal coliforms group of bacteria, unlike Escherichia coli, because it is incapable of growth at 44.5 °C in the presence of bile salts. Some of them show quorum sensing properties.
The Gemmatimonadota are a phylum of bacteria established in 2003. The phylum contains two classes Gemmatimonadetes and Longimicrobia.
Undibacterium is a genus of Gram-negative, oxidase- and catalase-positive Betaproteobacteria in the Oxalobacteraceae family. Undibacterium bacteria occurs in drinking water.
Undibacterium oligocarboniphilum is a Gram-negative, oxidase positive, catalase positive, flagellated, rod-shaped bacterium of the genus Undibacterium which was isolated from purified water. Its 16S rRNA gene sequence analysis has shown that it belongs to the family Oxalobacteraceae.
Undibacterium parvum is a Gram-negative, rod-shaped, oxidase positive, non-spore-forming, and low nutrient-loving bacterium of the genus Undibacterium and family Oxalobacteraceae which was found in drinking water.
Undibacterium pigrum is a Gram-negative, rod-shaped, oxidase positive, non-spore-forming, and nonmotile bacterium of the genus Undibacterium, which was found in drinking water.
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.
Aquabacterium citratiphilum is a Gram-positive, catalase-negative bacterium from the genus Aquabacterium and family Comamonadaceae, which was isolated with Aquabacterium commune and Aquabacterium parvum from biofilms of drinking water in Berlin.
Aquabacterium fontiphilum is a Gram-negative non-spore-forming, motile bacterium of the genus Aquabacterium in the family Comamonadaceae, which was isolated from a water sample from the Nature Valley in Hsinchu County in Taiwan. Aquabacterium fontiphilum has a single polar flagellum and its colonies are semitransparent.
Aquabacterium parvum is a Gram-negative, oxidase-positive, catalase-negative bacterium of the genus Aquabacterium in the family Comamonadaceae which was isolated with Aquabacterium commune and Aquabacterium citratiphilum from biofilms of Berlins drinking water.
Curvibacter delicatus is a Gram-negative bacterium from the genus Curvibacter and family Comamonadaceae, which was isolated from well water.
Curvibacter gracilis is a Gram-negative bacterium from the genus Curvibacter and family Comamonadaceae, which was isolated from well water.
Roseateles aquatilis is a Gram-negative, oxidase-positive, catalase-negative, aerobic, rod-shaped bacterium with a single polar flagellum from the genus Roseateles, which was isolated from industrial water and fresh water. Colonies of R. aquatilis are clear.
Tepidimonas aquatica is a gram-negative, aerobic, oxidase and catalase-positive thermophilic, rod-shaped, motile bacterium, with one polar flagellum from the genus Tepidimonas, which was isolated from a domestic water tank in Coimbra.
Thiomonas arsenitoxydans is a Gram-negative, moderately acidophilic, non-spore-forming, rod-shaped, motile bacterium from the genus Thiomonas, which has the ability to use arsenite as an energy source by oxidizing it.
Cupriavidus pauculus is a Gram-negative, nonfermentative, motile bacterium of the genus Cupriavidus and family Burkholderiaceae isolated from water from ultrafiltration systems and bottled mineral water. C. pauculus is associated with human infections.
Roseivivax halotolerans is a species of bacteria. It is aerobic and bacteriochlorophyll-containing, first isolated from the epiphytes on the stromatolites of a saline lake located on the west coast of Australia. It is chemoheterotrophic, Gram-negative, motile, rod-shaped and with subpolar flagella. Its type strain is OCh 210T.
Methylobacterium adhaesivum is a Gram-negative, methylotrophic, non-spore-forming strictly aerobic and motile bacteria from the genus of Methylobacterium which has been isolated from drinking water in Seville in Spain.
Aquabacterium limnoticum is a Gram-negative, facultatively anaerobic, short-rod-shaped, non-spore-forming and non-motile bacterium of the genus Aquabacterium which has been isolated from a freshwater spring in Taiwan.
Aquabacterium olei is a Gram-negative, non-spore-forming and motile bacterium of the genus Aquabacterium which has been isolated from oil-contaminated soil in Korea. Aquabacterium olei can degrade oil.
