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Cardiobacterium hominis.jpg
Cardiobacterium hominis on blood agar plate
Scientific classification


The Cardiobacteriaceae are a family of Proteobacteria, given their own order. They are Gram-negative and rod-shaped, with diameters around 0.5 to 1.7 µm and lengths from 1–6 µm. [1]

Proteobacteria phylum of Gram-negative bacteria

Proteobacteria is a major phylum of gram-negative bacteria. They include a wide variety of pathogens, such as Escherichia, Salmonella, Vibrio, Helicobacter, Yersinia, Legionellales and many other notable genera. Others are free-living (non-parasitic) and include many of the bacteria responsible for nitrogen fixation.

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Enterobacteriaceae family of bacteria

The Enterobacteriaceae are a large family of Gram-negative bacteria. This family is the only representative in the order Enterobacteriales of the class Gammaproteobacteria in the phylum Proteobacteria.

Micrometre one millionth of a metre

The micrometre or micrometer, also commonly known by the previous name micron, is an SI derived unit of length equalling 1×10−6 metre ; that is, one millionth of a metre.

Campylobacterales order of bacteria

The Campylobacterales are an order of Proteobacteria which make up the epsilon subdivision, together with the small family Nautiliaceae. Like all Proteobacteria, they are Gram-negative. Most of the species are microaerophilic.

Thiotrichales order of bacteria

The Thiotrichales are an order of Proteobacteria, including Thiomargarita namibiensis, the largest known bacterium.

Burkholderiales order of bacteria

The Burkholderiales are an order of Proteobacteria. Like all Proteobacteria, they are Gram-negative. They include several pathogenic bacteria, including species of Burkholderia, Bordetella, and Ralstonia. They also include Oxalobacter and related genera, which are unusual in using oxalic acid as their source of carbon.. Other well-studied genera include Alcaligenes, Cupriavidus, Achromobacter, Comamonas, Delftia, Massilia, Duganella, Janthinobacterium, Polynucleobacter, non-pathogenic Paraburkholderia, Caballeronia, Polaromonas, Thiomonas, Collimonas, Hydrogenophaga, Sphaerotilus, Variovorax, Acidovorax, Rubrivivax and Rhodoferax, and Herbaspirillum.

Legionellales order of bacteria

The Legionellales are an order of Proteobacteria. Like all Proteobacteria, they are Gram-negative. They comprise two families, typified by Legionella and Coxiella, both of which include notable pathogens. For example, Q fever is caused by Coxiella burnetii and Legionella pneumophila causes Legionnaires' disease and Pontiac fever.

Desulfovibrionales order of bacteria

Desulfovibrionales belong to the Phylum of Proteobacteria, with four families. Like all Proteobacteria, they are Gram-negative. The majority are sulfate-reducing, with the exception of Lawsonia and Bilophila. All members of this order are obligately anaerobic. Most species are mesophilic, but some are moderate thermophiles.

Aeromonadales order of bacteria

The Aeromonadales are an order of Proteobacteria, with 10 genera in two families. The species are anaerobic. The cells are rod-shaped. Some species of this order are motile by a single polar flagellum; others are not motile.

Alteromonadales order of bacteria

The Alteromonadales are an order of Proteobacteria. Although they have been treated as a single family, the Alteromonadaceae, they were divided into eight by Ivanova et al. in 2004. The cells are straight or curved rods. They are motile by the use of a single flagellum. Most of the species are marine.

The Alteromonadaceae are a family of Proteobacteria. They are now one of several families in the order Alteromonadales, including Alteromonas and its closest relatives. Species of this family are mostly rod-like shaped and motile by using one polar flagellum.

Betaproteobacteria class of bacteria

Betaproteobacteria are a class of gram-negative bacteria, and one of the eight classes of the phylum Proteobacteria.

Alphaproteobacteria class of bacteria

Alphaproteobacteria is a class of bacteria in the phylum Proteobacteria. Its members are highly diverse and possess few commonalities, but nevertheless share a common ancestor. Like all Proteobacteria, its members are gram-negative and some of its intracellular parasitic members lack peptidoglycan and are consequently gram variable.

Nondispersive infrared sensor

A nondispersive infrared sensor is a simple spectroscopic sensor often used as a gas detector. It is nondispersive in the sense of optical dispersion since the infrared energy is allowed to pass through the atmospheric sampling chamber without deformation.

Marinobacter hydrocarbonoclasticus is a species of Proteobacteria found in sea water which are able to degrade hydrocarbons. The cells are rod-shaped and motile by means of a single polar flagellum.

China–Brazil Earth Resources Satellite program

The China–Brazil Earth Resources Satellite program (CBERS) is a technological cooperation program between Brazil and China which develops and operates Earth observation satellites.

Mariprofundus ferrooxydans is a neutrophilic, chemolithotrophic, Gram-negative bacterium which can grow by oxidising ferrous to ferric iron. It is the sole member of the class Zetaproteobacteria in the phylum Proteobacteria.

Nisaea is a genus in the phylum Proteobacteria (Bacteria), which contains two species, namely N. denitrificans and N. nitritireducens, which were described in 2008.

Thiorhodospira sibirica is a species of alkaliphilic purple sulfur bacterium. It is strictly anaerobic, vibrioid- or spiral-shaped and motile by means of a polar tuft of flagella.


  1. George M. Garrity: Bergey's Manual of Systematic Bacteriology 2. Auflage. Springer, New York, 2005, Volume 2: The Proteobacteria, Part B: The Gammaproteobacteria