Bacteria and Locomotion
Country: United States
Date: January 2008
Why do bacterium move not how but why? is it just to transfer?
Usually, it's to find better conditions for them to live – perhaps it
might be for food, for oxygen (or to get away from oxygen), for light,
or for nutrients. Bacteria can sense chemical gradients, and move in
the direction of greater (or less) of whatever they are seeking. Other
bacteria move for reproductive reasons, to avoid toxins, and some
bacteria move for reasons we don't yet know.
Hope this helps,
Bacteria (not bacterium) move in order to encounter new sources of
nutrients and to avoid unfavorable conditions like heat, cold, acidity,
light, darkness, etc.
Ron Baker, Ph.D.
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Update: June 2012