Epsilonproteobacteria
Campylobacter fetus secondary electron
Epsilonproteobacteria (also ε - Proteobacteria ) refers to a class in the phylogenetic system of the bacteria, which have been prepared on the basis of the base sequence of the 16S ribosomal ribonucleic acid ( 16S rRNA). The phylum (the tribe ) Proteobacteria is divided into 5 classes Alphaproteobacteria to Epsilonproteobacteria. Due to the thin Mureinhülle which is superposed a lipid membrane all representatives of this tribe are gram- negative.
The Epsilonproteobacteria include only two orders:
- Campylobacterales Garrity et al. 2006
- Nautiliales Miroshnichenko et al. 2004
And further, as yet not sure unclassified isolates.
The order Campylobacterales turn so far includes only the two families Campylobacteraceae Vandamme & De Ley 1991 with the genera
- Campylobacter Sebald and Véron 1963
- Arcobacter Vandamme et al. 1991
- Sulfurospirillum Schumacher et al. 1993
And Helicobacteraceae Garrity et al. 2006 with the genera
- Helicobacter Goodwin et al. 1989
- Tanner Wolinella et al. In 1981.
Helicobacter pylori was isolated from the human stomach and is responsible for the development of gastric ulcers.