Movement symbiosis

Free-living spirochaets from the intestine of a termite.
Spirochaetes are thin, very long, corkscrew-like bacteria, whose
flagella which are under the cell covering cause a winding movement.
The most well-known spirochaetes are the exciters of the Syphilis, Treponema pallidum. However, most members of this group are completely harmless like symbionts on protozoa.

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