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Pseudomonadota (synonym "Proteobacteria") is a major phylum of Gram-negative bacteria. [10] Currently, they are considered the predominant phylum within the realm of bacteria. [ 11 ] They are naturally found as pathogenic and free-living (non- parasitic ) genera. [ 11 ]
Pseudomonas is a genus of Gram-negative bacteria belonging to the family Pseudomonadaceae in the class Gammaproteobacteria.The 348 members of the genus [2] [3] demonstrate a great deal of metabolic diversity and consequently are able to colonize a wide range of niches and hosts.
Gammaproteobacteria is a class of bacteria in the phylum Pseudomonadota (synonym Proteobacteria). It contains about 250 genera, which makes it the most genus-rich taxon of the Prokaryotes. [1] Several medically, ecologically, and scientifically important groups of bacteria belong to this class. All members of this class are Gram-negative.
The location of colonization of H. pylori, which affects the location of the ulcer, depends on the acidity of the stomach. [49] In people producing large amounts of acid, H. pylori colonizes near the pyloric antrum (exit to the duodenum) to avoid the acid-secreting parietal cells at the fundus (near the entrance to the stomach). [32]
The class of Proteobacteria was identified around 1980, with the discovery of Pelagibacteraceae following later. FEMS Microbiology Ecology notes that “SAR11 was first observed in the Sargasso Sea, and subsequent findings show that the clade is widespread in both marine and freshwater environments” (Ortmann & Santos, 2016).
Enterobacteriaceae is a large family of Gram-negative bacteria.It includes over 30 genera and more than 100 species. Its classification above the level of family is still a subject of debate, but one classification places it in the order Enterobacterales of the class Gammaproteobacteria in the phylum Pseudomonadota.
The Aeromonadaceae are Gram-negative bacteria. [2] The species are facultative anaerobic organisms. [3] The cells are rod-shaped. They are mostly found in estuarine waters and fresh water, also in soil and sewage.
Alphaproteobacteria or α-proteobacteria, also called α-Purple bacteria in earlier literature, is a class of bacteria in the phylum Pseudomonadota (formerly "Proteobacteria"). [4] The Magnetococcales and Mariprofundales are considered basal or sister to the Alphaproteobacteria .