Biofilm production in 1:1 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). Co-cultures included PA-68/MRSA-35, PA-68/MRSA-86, PA-76/MRSA-35, and PA-76/MRSA-35. 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.