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Definition of a biofilm - Again

David B. Hedrick davidbhedrick at icx.net
Sat Jul 24 06:38:41 EST 1999

How about: 
"A biofilm is a microbial growth on surfaces that forms structures not 
available to a single attached cell, and that changes the 
microenvironment experienced by the organisms." ? 
A bit wordy. This would include even a perfectly uniform biofilm. 
Perfect until anything happens. 8^) It's still a subjective call 
whether the structure and the environment have changed enough to be 
considered different. A hundred bacteria glued in a crack could be a 
biofilm. They could be corroding metal or fermenting under there. You 
wouldn't consider a tap water distribution system fouled because of 
that, but you would an industrial high-purity system. 
Technical writing, literature search, and data analysis at the interface 
of chemistry and biology. 
davidbhedrick at icx.net
David B. Hedrick 
P.O. Box 16082 
Knoxville, TN 37996

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