Halomonadaceae is a family of halophilic Pseudomonadota.
Enterobacter is a genus of common Gram-negative, facultatively anaerobic, rod-shaped, non-spore-forming bacteria of the family Enterobacteriaceae. 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.
Faecalibacterium is a genus of bacteria. Its sole known species, Faecalibacterium prausnitzii is gram-positive, mesophilic, rod-shaped, anaerobic and is one of the most abundant and important commensal bacteria of the human gut microbiota. It is non-spore forming and non-motile. These bacteria produce butyrate and other short-chain fatty acids through the fermentation of dietary fiber.
Porphyromonas is a Gram-negative, non-spore-forming, obligately anaerobic and non-motile genus from the family of Porphyromonadaceae.
The genus Raoultella is composed of Gram-negative, oxidase-negative, aerobic, nonmotile, capsulated, facultatively anaerobic rods in the family Enterobacteriaceae. It is named after the French bacteriologist Didier Raoult. The existence of this genus renders the genus Klebsiella paraphyletic, and it has been repeatedly proposed to consider Raoultella a junior synonym of Klebsiella.
Lentisphaerota is a phylum of bacteria closely related to Chlamydiota and Verrucomicrobiota.
Ruminococcus is a genus of bacteria in the class Clostridia. They are anaerobic, Gram-positive gut microbes. One or more species in this genus are found in significant numbers in the human gut microbiota. The type species is R. flavefaciens. As usual, bacteria taxonomy is in flux, with Clostridia being paraphyletic, and some erroneous members of Ruminococcus being reassigned to a new genus Blautia on the basis of 16S rRNA gene sequences.
Dechloromonas is a genus in the phylum Pseudomonadota (Bacteria).
Akkermansia is a genus in the phylum Verrucomicrobiota (Bacteria). The genus was first proposed by Derrien et al. (2004), with the type species Akkermansia muciniphila.
Raoultella terrigena is a Gram-negative bacterial species of the genus Raoultella, previously classified in the genus Klebsiella. It has primarily been isolated from soil and water samples, but rarely from humans. Studies have estimated fewer than 1% of healthy people harbor this species. This species has rarely been shown to cause disease in humans despite expressing many of the virulence factors expressed by other Klebsiella species such as Klebsiella pneumoniae.
Peptoniphilus is a genus of bacteria in the phylum Bacillota (Bacteria).
Christensenella is a genus of non-spore-forming, anaerobic, and nonmotile bacteria from the family Christensenellaceae. The species C. minuta has been published and validated, and C. timonensis and C. massiliensis have been proposed as novel species of the genus Christensenella, all isolated from human feces. C. minuta in the gut has been associated with reduction in body weight and adiposity of mice. In a test on 977 volunteers, humans with higher levels of Christensenella in their guts were found to be more likely to have a lower body mass index than those with low levels. Christensenella are better represented in persons who are metabolically healthy. However, there is a link to possible pathogenic qualities of C. minuta in humans. An 18-year-old male presented with symptoms of appendicitis. Lab work revealed C. Minuta was found in his bloodstream. Upon removal of the appendix, his symptoms and blood levels of C. minuta disappeared.
Anaerostipes is a Gram positive and anaerobic bacterial genus from the family of Lachnospiraceae. Anaerostipes occurs in the human gut. Anaerostipes may protect against colon cancer in humans by producing butyric acid.
Anaerococcus is a genus of bacteria. Its type species is Anaerococcus prevotii. These bacteria are Gram-positive and strictly anaerobic. The genus Anaerococcus was proposed in 2001. Its genome was sequenced in August 2009. The genus Anaerococcus is one of six genera classified within the group GPAC. These six genera are found in the human body as part of the commensal human microbiota.
Oscillospiraceae is a family of bacteria in the class Clostridia. All Oscillospiraceae are obligate anaerobes. However, members of the family have diverse shapes, with some rod-shaped and others cocci.
Jeotgalibaca is a genus of bacteria from the family of Carnobacteriaceae.
Mesobacillus is a genus of gram-positive or gram-variable, rod-shaped bacteria in the family Bacillaceae within the order Bacillales. The type species for this genus is Mesobacillus jeotgali.
Anaerococcus tetradius is a bacterium from the family Peptoniphilaceae. It was first isolated from vaginal discharges and ovarian abscesses, but is a common member of the vaginal flora.
Anaerococcus murdochii is a bacterium from the family Peptoniphilaceae. A. murdochii has been reported from skin and wound infections. Resistance or reduced susceptibility to several antibiotics, such as colistin sulphate, clindamycin and kanamycin A or penicillin has been reported.
