They argue that the name flagella should be restricted only to prokaryotic organelles, such as bacterial flagella and spirochaete axial filaments.
2.
The rotation of the axial filament relative to the cell body causes the entire bacterium to move forward in a corkscrew-like motion, even through material viscous enough to prevent the passage of normally flagellated bacteria.
3.
Like other spirochetes, such as " Treponema pallidum " ( the agent of syphilis ), " B . burgdorferi " has an axial filament composed of flagella which run lengthways between its cell wall and outer membrane.
4.
Other bacteria, such as most spirochetes, have two or more specialized flagella ( endoflagella ) arising from opposite poles of the cell, which together constitute the so-called " axial filament " that is located within the periplasmic space between the flexible cell wall and an outer sheath.
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