For dual species experiments, the aliquots were spotted on Pseudomonas isolation agar (BD) to select for P. aeruginosa and mannitol salt agar (BD) to select for S. aureus. The plates were incubated at 37°C for 16 h and the colonies of microorganisms (CFU) were counted. The CFU/ml was determined using the following formula: CFU counted x dilution HDAC assay factor x 100. Statistical HSP990 analyses Statistical analyses
of the results were done using GraphPad InStat 3.06 (GraphPad Software, San Diego, CA). One-way ANOVA with the Tukey-Kramer multiple comparisons post-test was used to determine significant differences over time and among treatments. The t-test was used to compare two strains or two treatments. Acknowledgements We thank Guido V. Bloemberg and Ellen L. Langendijk (pMP7605), Alexander R. Horswill (AH133/pCM11), Barbara H. Iglewski (PAO1, PAO-R1, PAO-JP1), Dennis Ohman (PDO111, PDO100), and Matthew R. Parsek (pMRP9-1) for their kind provision of strains or plasmids; Janet Dertien for assistance with the CLSM; and Joanna E. Swickard for critical reading of the manuscript. Strain PW7298::pqsA-lacZ was made available through grant NIH P30 DK089507. References 1. Gibson RL, Burns JL, Ramsey BW: Pathophysiology and management of pulmonary infections in cystic fibrosis. Selleck NU7026 Am J Respir Crit Care Med 2003, 168:918–951.PubMedCrossRef 2. Rommens JM, Iannuzzi MC, Kerem
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