| Helicobacter | |
|---|---|
| Scanning electron micrograph of Helicobacter bacteria. | |
| Scientific classification | |
| Kingdom: | Bacteria |
| Phylum: | Proteobacteria |
| Class: | Epsilon
Proteobacteria |
| Order: | Campylobacterales |
| Family: | Helicobacteraceae |
| Genus: | Helicobacter Goodwin et al. 1989 |
| Species | |
|
H. acinonychis |
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Helicobacter is a genus of Gram-negative bacteria possessing a characteristic helix shape. They were initially considered to be members of the Campylobacter genus, but since 1989 they have been grouped in their own genus.[1][2][3]
Some species have been found living in the lining of the upper gastrointestinal tract, as well as the liver of mammals and some birds.[4]. The most widely known species of the genus is H. pylori which infects up to 50% of the human population.[3] Some strains of this bacterium are pathogenic to humans as it is strongly associated with peptic ulcers, chronic gastritis, duodenitis, and stomach cancer. It also serves as the type species of the genus.
Helicobacter spp. are able to thrive in the very acidic mammalian stomach by producing large quantities of the enzyme urease, which locally raises the pH from ~2 to a more biocompatible range of 6 to 7.[5] Bacteria belonging to this genus are usually susceptible to antibiotics such as penicillin, are microaerophilic (require small amounts of oxygen), and are fast-moving with their flagella.[6][7]
Contents |
Helicobacter
Main Page
Superregnum: Bacteria
Regnum: Bacteria
Phylum: Proteobacteria
Classis: Epsilon Proteobacteria
Ordo: Campylobacterales
Familia: Helicobacteraceae
Genus: Helicobacter
Species: H. acinonychis -
H. aurati - H. bilis - H. bizzozeronii -
H. canadensis -
H. canis - H. cholecystus -
H. cinaedi - H. felis - H. fennelliae -
H. ganmani - H. hepaticus -
H. mesocricetorum -
H. muridarum -
H. mustelae -
H. nemestrinae -
H. pametensis -
H. pullorum -
H. pylori - H. rodentium -
H. salomonis -
H. trogontum -
H. typhlonius
| Helicobacter Click on organism name to get more information. http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Tree&id=209&lvl=3&lin=f&keep=1&srchmode=1&unlock">List of species in ''Helicobacter'', with links to sequence information - Taxonomy browser (Helicobacter) |
| http://www.wjgnet.com/1007-9327/5/7.pdf">Species differentiation and identification in the genus of ''Helicobacter''. |
| http://cmr.asm.org/cgi/reprint/10/4/720">''Helicobacter pylori''. - Helicobacter pylori -- Dunn et al. 10 (4): 720 -- Clinical Microbiology Reviews |
| http://www.dsmz.de/bactnom/nam3637.htm">List of species in ''Helicobacter'', with references - DSMZ - Bacterial Nomenclature Up-to-Date |
| Helicobacter... http://www.bmj.com/cgi/content/full/323/7318/920">''Epidemiology and diagnosis of Helicobacter pylori infection ''. - bmj.com Sign In Page |
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