|
Arcobacter Thereius
''Arcobacter'' is a genus of Gram-negative, spiral-shaped bacteria in the phylum Campylobacterota.Madigan T, ''et al'' (2009) ''Brock Biology of Microorganisms'', 12th edition. San Francisco: Pearson Education It shows an unusually wide range of habitats, and some species can be human and animal pathogens. Species of the genus ''Arcobacter'' are found in both animal and environmental sources, making it unique among the Campylobacterota. This genus currently consists of five species: ''A. butzleri'', ''A. cryaerophilus'', ''A. skirrowii'', ''A. nitrofigilis'', and ''A. sulfidicus'', although several other potential novel species have recently been described from varying environments. Three of these five known species are pathogenic. Members of this genus were first isolated in 1977 from aborted bovine fetuses. They are aerotolerant, '' Campylobacter''-like organisms, previously classified as ''Campylobacter''. The genus ''Arcobacter'', in fact, was created as recently as 1992. Al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bacteria
Bacteria (; singular: bacterium) are ubiquitous, mostly free-living organisms often consisting of one biological cell. They constitute a large domain of prokaryotic microorganisms. Typically a few micrometres in length, bacteria were among the first life forms to appear on Earth, and are present in most of its habitats. Bacteria inhabit soil, water, acidic hot springs, radioactive waste, and the deep biosphere of Earth's crust. Bacteria are vital in many stages of the nutrient cycle by recycling nutrients such as the fixation of nitrogen from the atmosphere. The nutrient cycle includes the decomposition of dead bodies; bacteria are responsible for the putrefaction stage in this process. In the biological communities surrounding hydrothermal vents and cold seeps, extremophile bacteria provide the nutrients needed to sustain life by converting dissolved compounds, such as hydrogen sulphide and methane, to energy. Bacteria also live in symbiotic and parasitic relationsh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
