Campylobacterales
| Campylobacterales | ||||||||||
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Helicobacter pylori |
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| Systematics | ||||||||||
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| Scientific name | ||||||||||
| Campylobacterales | ||||||||||
| Garrity et al., 2006 |
The Campylobacterales are an order of bacteria. Ecologically and in terms of their metabolism, they are a very diverse group. This also includes some medically important pathogens. You will be sent to the department of proteobacteria , the Gram stain turns out negative, as with all members of this class.
features
The cells of the Campylobacterales are usually curved or spiral, with the exception of Thiovulum majus , which forms round or egg-shaped cells. The species are usually microaerophilic , they can only live in environments with low oxygen levels. Some are also completely anaerobic ; these species can only survive in the complete absence of oxygen.
Thiovulum majus is one of the fastest moving bacteria at 600 micrometers per second.
Different types of Campylobacter can cause inflammation of the small intestine ( enteritis ) with bloody diarrhea, the so-called Campylobacter enteritis . Humans are infected through drinking water and food, often through poultry meat.
There are also some sulfur oxidizing bacteria present within the Campylobacterales. Thiovulum oxidizes hydrogen sulfide (H 2 S) with oxygen (O 2 ) to form elemental sulfur (S). During these reactions, energy is released that is used by the bacteria to assimilate carbon dioxide. Thiovulum thus plays an important role in the earth's sulfur cycle . The genus Sulfurospirillum , which belongs to the Campylobacteraceae family, reduces elemental sulfur with formic acid or hydrogen and thereby gains energy. Sulfurospirillum is therefore also important in the sulfur cycle.
Systematics
The order Campylobacter contains the following families and genera:
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Helicobacteraceae Garrity et al. 2006
- Helicobacter Goodwin et al. 1989
- Sulfuricurvum Kodama and Watanabe 2004
- Sulfurimonas Inagaki et al. 2003
- Sulfurovum Inagaki et al. 2004
- Thiovulum Hinze 1913
- Wolinella Tanner et al. 1981
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Campylobacteraceae Garrity et al. 2006
- Arcobacter Vandamme et al. 1991
- Campylobacter Sebald and Véron 1963
- Sulfurospirillum Schumacher et al. 1993
- " Hydrogenimonaceae "
- Hydrogenimonas Takai et al. 2004
Individual evidence
- ↑ H.-W. Baenkler, U. Clement: Dual series of internal medicine . Georg Thieme, Stuttgart 2001, ISBN 3-13-128751-9 .
- ↑ JP Euzéby: List of Prokaryotic names with Standing in Nomenclature - Campylobacterales . As of April 4, 2019
- ↑ Ken Takai, Kenneth H Nealson, Koki Horikoshi: Hydrogenimonas thermophila gen. Nov., Sp. nov., a novel thermophilic, hydrogen-oxidizing chemolithoautotroph within the epsilon-Proteobacteria, isolated from a black smoker in a Central Indian Ridge hydrothermal field . In: International Journal of Systematic and Evolutionary Microbiology . tape 54 , Pt 1, 2004, ISSN 1466-5026 , p. 25-32 , doi : 10.1099 / ijs.0.02787-0 , PMID 14742455 .
literature
- Michael T. Madigan, John M. Martinko, Jack Parker: Brock - Microbiology . 11th edition, Pearson Studium, Munich 2006, ISBN 3-8274-0566-1 .
- George M. Garrity (Ed.): Bergey's Manual of Systematic Bacteriology . 2nd edition, Volume 2: The Proteobacteria. Part C: The Alpha-, Beta-, Delta-, and Epsilonproteabacteria . Springer, New York 2005, ISBN 0-387-24145-0 .
Web links
- Sulfur cycle GeoDZ.com The lexicon of the earth