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Scanning electron micrographs of S. epidermidis and A. pleuropneumoniae biofilms cultured in centrifugal filter devices. (A and B) S. epidermidis strain NJ9709 cultured in the absence and presence of 20 μg of dispersin B ml−1, respectively; (C and D) A. pleuropneumoniae wild-type strain IA5 and PNAG mutant strain EI1001, respectively. Images show an area on the top surface of the biofilm near the center of the filter.
