I think a critical aspect of a biofilm is not only the structural one
but also that there is a change in phenotype, that is, the cells
do something differently because of the environment created by the
other cells in the film. The term 'quorum sensing' is used to
describe this.
Should the presense of quorum sensing be part of the definition of
a biofilm or is the adherence to a set of structural qualifications
sufficient?
Dick Murphy
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