Leptonema illini

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Leptonema illini
Systematics
Department : Spirochaetes
Class : Spirochaetes
Order : Spirochaetales
Family : Leptospiraceae
Genre : Leptonema
Type : Leptonema illini
Scientific name of the  genus
Leptonema
Hovind-Hougen 1983
Scientific name of the  species
Leptonema illini
Hovind-Hougen 1983

Leptonema illini is a type of bacteria . It is one of the spirochetes . It is the only species in the genus Leptonema . It is found freely living in water media and in the soil.

features

Appearance

Leptonema are Gram-negative , very thin, helical bacteria around 0.1–0.2 μm in diameter and 13–21 μm in length. They are usually unicellular, but can also be seen as short chains in growing cultures. You are very mobile ( motile ).

Growth and metabolism

These bacteria are chemo - heterotrophic , photosynthesis does not take place, breathing takes place . They are obligatory aerobic . Long-chain fatty acids and fatty alcohols are the main sources of carbon and energy . Growth takes place at temperatures of 13 to 30 ° C. Optimal temperatures are between 28 and 30 ° C.

Pathogenicity

Leptonema illini is assigned to risk group 1 by the Biological Agents Ordinance in conjunction with the TRBA ( Technical Rules for Biological Agents) 466 and therefore belongs to the bacteria "which are unlikely to cause disease in humans" ( § 3 Biological Agents Ordinance) .

Systematics

Leptonema illini Hovind-Hougen 1983 is a member of the Leptospiraceae family , which also includes the Leptospira genus . Leptospira illini , described by Hanson et al. 1974, is a synonym of the species.

etymology

The generic name Leptonema is derived from the Greek words leptos ("thin") and nema ("filament" or "thread") and refers to the appearance of the cells. The species name L. illini contains the neo-Latin word illini (genitive) and refers to the place where it was found; the first isolate comes from the US state of Illinois .

swell

Individual evidence

  1. ↑ a b Noel R. Krieg et al. (Ed.): Bergey's Manual of Systematic Bacteriology . 2nd edition, Volume 4: The Bacteroidetes, Spirochaetes, Tenericutes (Mollicutes), Acidobacteria, Fibrobacteres, Fusobacteria, Dictyoglomi, Gemmatimonadetes, Lentisphaerae, Verrucomicrobia, Chlamydiae, and PlanctomycetesVerlag = Springer . New York 2010, ISBN 978-0-387-95042-6 , pp. 351-358 .
  2. ↑ TRBA (Technical Rules for Biological Agents) 466: Classification of prokaryotes (Bacteria and Archaea) into risk groups. In: Website of the Federal Institute for Occupational Safety and Health (BAuA). April 2012, accessed April 9, 2014 .
  3. ^ A b c Jean Euzéby, Aidan C. Parte: genus Leptonema. In: List of Prokaryotic names with Standing in Nomenclature ( LPSN ). Retrieved April 9, 2014 .

literature

  • Noel R. Krieg et al. (Ed.): Bergey's Manual of Systematic Bacteriology. 2nd edition, Volume 4: The Bacteroidetes, Spirochaetes, Tenericutes (Mollicutes), Acidobacteria, Fibrobacteres, Fusobacteria, Dictyoglomi, Gemmatimonadetes, Lentisphaerae, Verrucomicrobia, Chlamydiae, and Planctomycetes . Springer, New York 2010, ISBN 978-0-387-95042-6 .