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What is Epsilonproteobacteria?

The Epsilonproteobacteria consist of few known genera, mainly the curved to spirilloid Wolinella spp., Helicobacter spp., and Campylobacter spp. Most of the known species inhabit the digestive tracts of animals and serve as symbionts ( Wolinella spp. in cattle) or pathogens ( Helicobacter spp. in the stomach, Campylobacter spp. in the duodenum).

What is the difference between Epsilonproteobacteria and Oligoflexia?

The Epsilonproteobacteria are often slender, Gram-negative rods that are helical or curved. The type order is the Campylobacterales, which includes important food pathogens such as Campylobacter spp. The Oligoflexia are filamentous aerobes. The type order is the Oligoflexales, which contains the genus Oligoflexus.

What is the electron acceptor substrate of Epsilonproteobacteria?

Epsilonproteobacterial cells usually grow at the expense of microaerobic or anaerobic respiration and many species use hydrogen, formate or reduced sulphur compounds, such as sulphide or thiosulfate as electron donor substrates. Nitrate is a prominent electron acceptor in Epsilonproteobacteria and is initially reduced to nitrite by Nap.

Is Escherichia a Proteobacteria?

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


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