Filibacter limicola
Garret Bethke
While searching through sediment from Blelham Tarn, a lake in the English Lake District, Mark Maiden and J. Gwynfryn Jones discovered a new organism.  Blelham Tarn is a eutrophic lake where a vast variety of filamentous bacteria have been found.  Using a Jenkin surface-mud sampler, deep water cores were taken at 14m depth.  From this, the top  2cm were removed, diluted and checked for different types of filamentous bacteria.  By a stroke of luck, a new species was discovered.  This new species, a Gram-negative, multicellular, filamentous,  based on its origin in sediment.  In Latin Filibacter means "thread rod" and limicola means "mud dweller".

The organism is a strict aerobe capable of growth on defined mixtures of amino acids and has a requirement for vitamins.  The species is urease and oxidase positive.  It grows well at pH 7.4 and has an optimum temperature of 20 C.  Growth is slow at 4 C and no growth at all is found at temperatures above 26 C.  It is a gelatin hydrolyzer but not a casein and starch hydrolyzer.  Sugars and organic acids are not utilized, and amino acids are only used as carbon and energy sources.

This new genus and species has provided a new outlook and another reason to continue the search for new species in hopes of bridging the evolutionary gap.

Claus, D., Fritze, D., and Kocur, M..  The Prokaryotes 2nd Edition.  New
York:Springer-Verlag,1991.  Volume 2. pp 1783-1784.
Maiden, Mark, and Jones, J. Gwynfryn.  "A New Filamentous, Gliding
Bacterium, Filibacter linicola gen. nov. sp. Nov., from Lake Sediment."
Journal of General Microbiology. Great Britain. 1984. pp 2943-2957.

*Disclaimer - This report was written by a student participaring in a microbiology course at the Missouri University of Science and Technology. The accuracy of the contents of this report is not guaranteed and it is recommended that you seek additional sources of information to verify the contents.


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