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need for definitions

Robert J. Palmer Jr. rjpalmer at utkux.utcc.utk.edu
Fri Jul 30 02:22:33 EST 1999

Let's forget about lichens for the time being (not because this isn't a
valid thing to consider, but it is extremely complicated) and just settle
on your example of concrete infestation. Why do you say that the microbes
involved do not have EPS or a biofilm phenotype?
 >I would hope that any definition of "biofilm" considers phenomena beyond the
 >well-known aqueous based model. Microbes will inhabitand affect (including
 >grade) virtually any somewhat hydrated surface from skin to concrete and 
 >- growth that I would call a biofilm and growth that may not be 
accompanied by
 >EPS, unique cellular organization or, to this point, expression of a
 >discernable "biofilm" phenotype.
 >Please consider lichens, the infestation of concrete, etc in your thinking.

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