<I>P. aeruginosa</I> mutants (IMAGE) Binghamton University Caption P. aeruginosa mutants inactivated in the key regulator BfiS are arrested in biofilm development. Biofilm architecture of P. aeruginosa wild type (A) and ∆bfiS mutant (B) biofilms following 144 hrs of growth. Credit Karin Sauer Usage Restrictions With permission from Professor Sauer. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.