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are an order of Proteobacteria
The Proteobacteria are a major group of bacteria. They include a wide variety of pathogens, such as Escherichia, Salmonella, Vibrio, Helicobacter, and many other notable genera....
. Like all Proteobacteria, they are gram-negative
Gram-negative bacteria are bacteria that do not retain crystal violet dye in the Gram staining protocol. In a Gram stain test, a counterstain is added after the crystal violet, coloring all Gram-negative bacteria with a red or pink color...
. They include several pathogenic bacteria, including species of Burkholderia
Burkholderia is a genus of proteobacteria probably best known for its pathogenic members:Burkholderia mallei, responsible for glanders, a disease that occurs mostly in horses and related animals;...
Bordetella is a genus of small , Gram-negative coccobacilli of the phylum proteobacteria. Bordetella species, with the exception of B. petrii, are obligate aerobes as well as highly fastidious, or difficult to culture. Three species are human pathogens ; one of these Bordetella is a genus of small...
. They also include Oxalobacter
Oxalobacter is a genus of bacteria in the Oxalobacteraceae family. The species are chemoorganotroph and strictly anaerobic. They are found in rumens of animals like cattles and in fecal of other animals and humans. Some are marine and some have been isolated from freshwater....
and related genera, which are unusual in using oxalic acid
Oxalic acid is an organic compound with the formula H2C2O4. This colourless solid is a dicarboxylic acid. In terms of acid strength, it is about 3,000 times stronger than acetic acid. Oxalic acid is a reducing agent and its conjugate base, known as oxalate , is a chelating agent for metal cations...
as their source of carbon.
- Burkholderiales J.P. Euzéby: List of Prokaryotic names with Standing in Nomenclature