Biofilm production in 3:1 MRSA: P. aeruginosa co-cultures after 24 hours. Biofilm production as observed at OD = 562 nm after crystal violet microtiter plate assay among P. aeruginosa (PA-68, PA-76) and MRSA (MRSA-35, MRSA-86). 3:1 Co-cultures included MRSA-35/PA-68, MRSA-35/PA-76, MRSA-86/PA-68, and MRSA-86/PA-76. The various protein ratios/well coatings are shown in the x-axis with HA representing hyaluronan. Error bars shown represent the 1 standard deviation values for each sample.