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Spirochaetes
{{Taxobox
| color = lightgrey
| name = Spirochaetes
| regnum = Bacteria
| phylum = Spirochaetes
| classis = Spirochaetes
| ordo = Spirochaetales
| ordo_authority = Buchanan, 1917
| subdivision_ranks = Families
| subdivision =
Spirochaetaceae
Brachyspiraceae
Brachyspira
Serpulina
Leptospiraceae
Leptospira
Leptonema
}}
The spirochaetes (or spirochetes) are a phylumof distinctive bacteria, which have long, helically coiled cells. They are distinguished by the presence of flagellarunning lengthwise between the cell membrane and cell wall, called axial filaments. These cause a twisting motion which allows the spirochaete to move about. Most spirochaetes are free-living and anaerobic, but there are numerous exceptions.
It has been suggested by Lynn Margulisthat eukaryotic flagella were derivedfrom symbiotic spirochaetes, but few biologists accept this, as there is no close structural similarity between the two.
The spirochaetes are divided into three families, all placed within a single order. Important members of this phylum include
- Leptospira species, which causes leptospirosis,
- Borrelia burgdorferi, which causes Lyme disease, and
- Treponema pallidum, which causes syphilis.
External links
- Cystic Forms of Spirochetes: Complete Bibliography and Picturesda:Spirokęt
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Categories: Bacteria| Spirochaetes
This article is licensed under the GNU Free Documentation License.
It uses material from the http://en.wikipedia.org/wiki/Spirochaetes Wikipedia article Spirochaetes.
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