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Bacillus is a genus of Gram-positive, rod-shaped bacteria, a member of the phylum Bacillota, with 266 named species. The term is also used to describe the shape (rod) of other so-shaped bacteria; and the plural Bacilli is the name of the class of bacteria to which this genus belongs. Bacillus species can be either obligate aerobes which are dependent on oxygen, or facultative anaerobes which can survive in the absence of oxygen. Cultured Bacillus species test positive for the enzyme catalase if oxygen has been used or is present.
Bacillus subtilis, known also as the hay bacillus or grass bacillus, is a gram-positive, catalase-positive bacterium, found in soil and the gastrointestinal tract of ruminants, humans and marine sponges. As a member of the genus Bacillus, B. subtilis is rod-shaped, and can form a tough, protective endospore, allowing it to tolerate extreme environmental conditions. B. subtilis has historically been classified as an obligate aerobe, though evidence exists that it is a facultative anaerobe. B. subtilis is considered the best studied Gram-positive bacterium and a model organism to study bacterial chromosome replication and cell differentiation. It is one of the bacterial champions in secreted enzyme production and used on an industrial scale by biotechnology companies.
Bacillus halodurans is a rod-shaped, Gram-positive, motile and spore-forming bacterium found in soil. In a genomic comparison with Bacillus subtilis, B. halodurans strain C-125 - originally an unclassified Bacillus strain - was found to contain unique genes and sigma factors that may have aided its adaptation to more alkaline environments.
Bacillus atrophaeus is a species of black-pigmented bacteria. Its type strain is NRRL NRS-213. B. atrophaeus strains have been used extensively in biomedicine as indicator strains for heat- and chemical-based decontamination regimens. Most of the strains in use are derivatives of a lineage of B. atrophaeus that originated at Camp Detrick in the 1950s, where many modern biocontainment procedures were developed.
Bacillus clarkii is a facultative anaerobe bacterium. It is a gram positive, alkaliphilic and alkalitolerant, aerobic endospore-forming bacteria.
Bacillus gibsonii is a facultative anaerobe bacterium. It is a gram positive, alkaliphilic and alkalitolerant, aerobic endospore-forming bacteria.
Bacillus halmapalus is a facultative anaerobe bacterium. It is a gram positive, alkaliphilic and alkalitolerant, aerobic endospore-forming bacteria.
Bacillus horikoshii is a facultative anaerobe bacterium. It is a gram positive, alkaliphilic and alkalitolerant, aerobic endospore-forming bacteria.
Bacillus pseudalcalophilus is a facultative anaerobe bacterium. It is a gram positive, alkaliphilic and alkalitolerant, aerobic endospore-forming bacteria.
Bacillus pseudofirmus is a facultative anaerobe bacterium. It is a gram positive, alkaliphilic and alkalitolerant, aerobic endospore-forming bacteria.
Oceanobacillus iheyensis is a bacterium, the type species of its genus. It is a deep-sea species, having been isolated from a depth of 1,050 metres (3,440 ft), and is extremely halotolerant and alkaliphilic. Its type strain is HTE831. Oceanobacillus iheyensis HTE831 is an alkaliphilic and extremely halotolerant Bacillus-related species isolated from deep-sea sediment.
Desulfonatronovibrio hydrogenovorans is a bacterium, the type species of its genus. It is an alkaliphilic, sulfate-reducing and motile bacterium. It is obligately sodium-dependent and its type strain is Z-7935.
Lysinibacillus fusiformis is a gram-positive, rod-shaped bacterium of the genus Lysinibacillus. Scientists have yet to completely characterize this microbe's pathogenic nature. Though little is known about this organism, several genome sequencing projects for various strains of L. fusiformis are currently underway.
Bacillus horti is a species of Gram-negative alkaliphilic bacillus. Its cells are strictly aerobic rods that produce subterminally located ellipsoidal spores. Its type strain is K13T.
Desulfonatronum thiodismutans is an alkaliphilic, sulfate-reducing bacterium capable of lithoautotrophic growth. It is Gram-negative, vibrio-shaped, with cells 0.6–0.7×1.2–2.7 μm in size, motile by a single polar flagellum. Its type strain is MLF1T.
Fictibacillus nanhaiensis is a Gram-positive, aerobic, slightly halophilic, facultatively alkaliphilic, rod-shaped, spore-forming and motile bacterium from the genus of Fictibacillus which has been isolated from an oyster from the Naozhou Island in China.
Fictibacillus solisalsi is a Gram-positive, rod-shaped, halotolerant, alkaliphilic and motile bacterium from the genus of Fictibacillus which has been isolated from saline soil from Shanxi in China.
Halolactibacillus halophilus is a non-spore-forming, halophilic and alkaliphilic bacterium from the genus of Halolactibacillus which has been isolated from algae from the Kanagawa Prefecture in Japan.
Salipaludibacillus neizhouensis is a Gram-positive, facultatively alkaliphilic, slightly halophilic, endospore-forming, rod-shaped, aerobic and non-motil bacterium from the genus of Salipaludibacillus which has been isolated from a sea anemone from Neizhou Bay from the South China Sea.
Alkalihalobacillus is a genus of gram-positive or gram-variable rod-shaped bacteria in the family Bacillaceae from the order Bacillales. The type species of this genus is Alkalihalobacillus alcalophilus.
References
- 1 2 "Salipaludibacillus agaradhaerens (Bacillus agaradhaerens)". www.uniprot.org.
- ↑ Parte, A.C. "Salipaludibacillus". LPSN .
- ↑ Nielsen, P.; Fritze, D.; Priest, F. G. (1995). "Phenetic diversity of alkaliphilic Bacillus strains: proposal for nine new species". Microbiology. 141 (7): 1745–1761. doi: 10.1099/13500872-141-7-1745 . ISSN 1350-0872.
- ↑ G. Cada, Erika Joy (June 2019). "Enhanced in vitro biodegradation of low-density polyethylene using alkaliphilic bacterial consortium supplemented with iron oxide nanoparticles" (PDF). Philippine Science Letters. 12.
