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Pseudomonadota is a major phylum of Gram-negative bacteria. The renaming of several prokaryote phyla in 2021, including Pseudomonadota, remains controversial among microbiologists, many of whom continue to use the earlier name Proteobacteria, of long standing in the literature. The phylum Proteobacteria includes a wide variety of pathogenic genera, such as Escherichia, Salmonella, Vibrio, Yersinia, Legionella, and many others. Others are free-living (non-parasitic) and include many of the bacteria responsible for nitrogen fixation.
Yersinia pestis is a gram-negative, non-motile, coccobacillus bacterium without spores that is related to both Yersinia enterocolitica and Yersinia pseudotuberculosis, the pathogen from which Y. pestis evolved and responsible for the Far East scarlet-like fever. It is a facultative anaerobic organism that can infect humans via the Oriental rat flea. It causes the disease plague, which caused the Plague of Justinian and the Black Death, the deadliest pandemic in recorded history. Plague takes three main forms: pneumonic, septicemic, and bubonic. Yersinia pestis is a parasite of its host, the rat flea, which is also a parasite of rats, hence Y. pestis is a hyperparasite.
Yersinia is a genus of bacteria in the family Yersiniaceae. Yersinia species are Gram-negative, coccobacilli bacteria, a few micrometers long and fractions of a micrometer in diameter, and are facultative anaerobes. Some members of Yersinia are pathogenic in humans; in particular, Y. pestis is the causative agent of the plague. Rodents are the natural reservoirs of Yersinia; less frequently, other mammals serve as the host. Infection may occur either through blood or in an alimentary fashion, occasionally via consumption of food products contaminated with infected urine or feces.
Halomonadaceae is a family of halophilic Pseudomonadota.
The International Code of Nomenclature of Prokaryotes (ICNP) or Prokaryotic Code, formerly the International Code of Nomenclature of Bacteria (ICNB) or Bacteriological Code (BC), governs the scientific names for Bacteria and Archaea. It denotes the rules for naming taxa of bacteria, according to their relative rank. As such it is one of the nomenclature codes of biology.
The indole test is a biochemical test performed on bacterial species to determine the ability of the organism to convert tryptophan into indole. This division is performed by a chain of a number of different intracellular enzymes, a system generally referred to as "tryptophanase."
Alteromonas is a genus of Pseudomonadota found in sea water, either in the open ocean or in the coast. It is Gram-negative. Its cells are curved rods with a single polar flagellum.
Actinobacillus is a genus of Gram-negative, nonmotile and non-spore-forming, oval to rod-shaped bacteria occurring as parasites or pathogens in mammals, birds, and reptiles. It is a member of the family Pasteurellaceae. The bacteria are facultatively anaerobic or aerobic, capable of fermenting carbohydrates, and of reducing nitrates. The genomic DNA contains between 40 and 47 mol % guanine plus cytosine.
Neisseria bacilliformis is a bacterium commonly found living as a commensal in the mucous membranes of mammals. However, depending on host immunocompetence, there have been documented cases of N. bacilliformis infections of the respiratory tract and oral cavity thus making it an opportunistic pathogen. It was originally isolated from patients being treated in a cancer center. Rarely, a more serious infection such as endocarditis can occur often as a result of a predisposing condition.
Pasteurella canis is a Gram-negative, nonmotile, penicillin-sensitive coccobacillus of the family Pasteurellaceae. Bacteria from this family cause zoonotic infections in humans, which manifest themselves as skin or soft-tissue infections after an animal bite. It has been known to cause serious disease in immunocompromised patients.
CDP-abequose synthase (EC 1.1.1.341, rfbJ (gene)) is an enzyme with systematic name CDP-alpha-D-abequose:NADP+ 4-oxidoreductase. This enzyme catalyses the following chemical reaction
Actinobacillus rossii is a bacterium. It was first isolated from the vaginas of postparturient sows.
Actinobacillus seminis is a Gram-negative bacterium associated with epididymitis of sheep.
Pasteurella bettyae is a bacterium associated with human Bartholin gland abscess and finger infections.
Pasteurella mairii is a Gram-negative bacterium. It causes abortion in sows.
Yersinia mollaretii is a Gram-negative species of bacteria. The species is named after Henri Mollaret, the former head of the National Yersinia Center at Institut Pasteur.
Avibacterium is a genus of Gram-negative bacteria from the family Pasteurellaceae.
Muribacter is a genus of bacteria from the class of Pasteurellaceae with one known species. Muribacter muris has been isolated from a mouse.
Yersinia similis is a Gram-negative bacteria species of Yersinia that resembles Yersinia pseudotuberculosis phenotypically but differs on the basis of 16S ribosomal RNA sequences. The type strain Y228 was originally isolated from a rabbit in Germany.
Aggregatibacter segnis is a species of bacteria. A. segnis can be cultured on chocolate agar.
References
- ↑ Sneath, P. H. A.; Stevens, M. (1990). "Actinobacillus rossii sp. nov., Actinobacillus seminis sp. nov., nom. rev., Pasteurella bettii sp. nov., Pasteurella lymphangitidis sp. nov., Pasteurella mairi sp. nov., and Pasteurella trehalosi sp. nov". International Journal of Systematic Bacteriology. 40 (2): 148–153. doi: 10.1099/00207713-40-2-148 . ISSN 0020-7713. PMID 2223608.
- ↑ Olivier Gaillot; Olivier Lemenand; Michael Marceau & Michel Simonet (August 2013). "Proposed reclassification of Pasteurella lymphangitidis Sneath & Stevens 1990 as Yersinia pseudotuberculosis". International Journal of Systematic and Evolutionary Microbiology . 63 (Pt 10): 3927–9. doi: 10.1099/ijs.0.051524-0 . PMID 23919959.
