"Aquifex aeolicus" is a chemolithoautotrophic, Gram-negative, motile, hyperthermophilic bacterium. "A. aeolicus" is generally rod-shaped with an approximate length of 2.0-6.0μm and a diameter of 0.4-0.5μm. "A. aeolicus" is neither validly nor effectively published and, having no standing in nomenclature, should be styled in quotation marks. It is one of a handful of species in the Aquificota phylum, an unusual group of thermophilic bacteria that are thought to be some of the oldest species of bacteria, related to filamentous bacteria first observed at the turn of the century. "A. aeolicus" is also believed to be one of the earliest diverging species of thermophilic bacteria. "A. aeolicus" grows best in water between 85 °C and 95 °C, and can be found near underwater volcanoes or hot springs. It requires oxygen to survive but has been found to grow optimally under microaerophilic conditions. Due to its high stability against high temperature and lack of oxygen, "A. aeolicus" is a good candidate for biotechnological applications as it is believed to have potential to be used as hydrogenases in an attractive H2/O2 biofuel cell, replacing chemical catalysts. This can be useful for improving industrial processes.
Sulfur-reducing bacteria are microorganisms able to reduce elemental sulfur (S0) to hydrogen sulfide (H2S). These microbes use inorganic sulfur compounds as electron acceptors to sustain several activities such as respiration, conserving energy and growth, in absence of oxygen. The final product of these processes, sulfide, has a considerable influence on the chemistry of the environment and, in addition, is used as electron donor for a large variety of microbial metabolisms. Several types of bacteria and many non-methanogenic archaea can reduce sulfur. Microbial sulfur reduction was already shown in early studies, which highlighted the first proof of S0 reduction in a vibrioid bacterium from mud, with sulfur as electron acceptor and H
2 as electron donor. The first pure cultured species of sulfur-reducing bacteria, Desulfuromonas acetoxidans, was discovered in 1976 and described by Pfennig Norbert and Biebel Hanno as an anaerobic sulfur-reducing and acetate-oxidizing bacterium, not able to reduce sulfate. Only few taxa are true sulfur-reducing bacteria, using sulfur reduction as the only or main catabolic reaction. Normally, they couple this reaction with the oxidation of acetate, succinate or other organic compounds. In general, sulfate-reducing bacteria are able to use both sulfate and elemental sulfur as electron acceptors. Thanks to its abundancy and thermodynamic stability, sulfate is the most studied electron acceptor for anaerobic respiration that involves sulfur compounds. Elemental sulfur, however, is very abundant and important, especially in deep-sea hydrothermal vents, hot springs and other extreme environments, making its isolation more difficult. Some bacteria – such as Proteus, Campylobacter, Pseudomonas and Salmonella – have the ability to reduce sulfur, but can also use oxygen and other terminal electron acceptors.
The Alicyclobacillaceae are a family of Gram-positive bacteria. All members of this family are aerobic and form endospores.
Salinicola salarius is a Gram-negative, moderately halophilic, piezophilic bacterium that requires pressures of 102 MPa to grow. The species was first isolated from a salt water sample from Anmyeondo, Korea and was formally described in 2007. S salarius cells are aerobic, Gram-negative, non-spore-forming rods (0.8–0.9x1.3–1.7 μm) that form yellow, smooth, translucent, circular colonies with entire edges. The oxidase- and catalase-positive cells are motile and possess lateral/polar flagella. Growth occurs at 10–45 °C and at pH 5–10. The strain is able to grow at salinities between 0 and 25% NaCl.
Marinitoga piezophila is a species of rod-shaped, thermo-piezophilic bacteria. It is, anaerobic, chemo-organotrophic, sulfur-reducing, motile, have a mean length of 1-1.5 micrometres and stains Gram-negative. The type strain is KA3T.
Ideonella sakaiensis is a bacterium from the genus Ideonella and family Comamonadaceae capable of breaking down and consuming the plastic polyethylene terephthalate (PET) using it as both a carbon and energy source. The bacterium was originally isolated from a sediment sample taken outside of a plastic bottle recycling facility in Sakai City, Japan.
Salisediminibacterium halotolerans is a gram-positive, alkalitolerant, and halophilic bacterium from the family Bacillaceae and genus of Salisediminibacterium, which was one of three bacterial strains, and the only novel species, isolated from sediments from the Xiarinaoer soda lake in Mongolia in 2012.
Cloacibacillus evryensis is a Gram-negative, anaerobic, mesophilic, rod-shaped and non-motile bacterium from the genus of Cloacibacillus which has been isolated from sewage sludge from a wastewater treatment plant in Évry, France.
Coprothermobacter platensis is a species of moderately thermophilic and strictly anaerobic bacterium belonging to the family Coprothermobacteraceae within the phylum Coprothermobacterota.
Tumebacillus permanentifrigorisis is a species of Gram positive, strictly aerobic, bacterium. The cells are rod-shaped and form spores. It was first isolated from a 9-meter-deep permafrost sample from the Canadian high Arctic. The species was first described in 2008, and the name refers to its original isolation from permafrost. T. permanentifrigoris was the first species in the new genus, Tumebacillus, and is the type species for the genus. The isolate may have survived 5000–7000 years in ice before being discovered.
Tumebacillus is a genus of Gram-positive, rod-shaped, spore-forming bacteria. Members of the genus can be motile or non-motile, and form white or yellow colonies on R2A agar.
Tumebacillus algifaecis is a species of Gram positive, facultatively anaerobic, bacterium. The cells are rod-shaped and form spores. It was first isolated from an algal bloom in Taihu Lake, China. The species was first described in 2015, and the name is derived from Latin alga (algae) and faex and refers to its original isolation from the algal bloom.
Tumebacillus avium is a species of Gram positive, facultatively aerobic, bacterium. The cells are rod-shaped, motile, and form spores. It was first isolated from faecal sample of a cinereous vulture from the Seoul Grand Park Zoo, Seoul, South Korea. The species was first described in 2018, and the name is derived from Latin avium.
Tumebacillus ginsengisoli is a species of Gram positive, aerobic, bacterium. The cells are rod-shaped, non-motile, and form spores. It was first isolated from soil in a ginseng field in Pocheon, South Korea, and the species name is derived from the ginseng soil isolation location. T. ginsengisoli was the second species added to the genus Tumebacillus.
Tumebacillus lipolyticus is a species of Gram positive, aerobic, bacterium. The cells are rod-shaped, non-motile, and form spores. It was first isolated from surface water of Godavari River in Kapileswarapuram, India. The species was first described in 2015, and the name is derived from Greek lipos (fat) and lytikos, referring to the species ability to hydrolyze lipids.
Tumebacillus luteolus is a species of Gram positive, aerobic, bacterium. The cells are rod-shaped, non-motile, and form spores. It was first isolated from soil in Ukraine. The species was first described in 2015, and the name is derived from Latin luteolus (yellowish), referring to the colony color on R2A agar.
Tumebacillus soli is a species of Gram positive, aerobic, bacterium. The cells are rod-shaped, motile, and form spores. It was first isolated from soil in Danghangpo, South Korea. The species was first described in 2015, and the name refers to its initial isolation from soil.
Janibacter limosus is a species of Gram positive, strictly aerobic, bacterium. The species was initially isolated from sludge from a wastewater treatment plant in Jena, Germany. The species was first described in 1997, and the species name is derived from Latin limosus (muddy). J. limosus was the first species assigned to Janibacter, and is the type species for the genus.
Phycicoccus jejuensis is a species of Gram positive, strictly aerobic, non-motile, non-endospore-forming bacterium. The species was initially isolated from a dried seaweed sample collected from a sandy beach in Jeju Province, South Korea. The species was first described in 2006, and its name refers to the province from which it was first isolated. P. jejuensis was the first species in the genus Phycicoccus, and is the type species for the genus.
Acidipropionibacterium timonense (A. timonense) is a bacterium from the genus of Acidipropionibacterium.
