MUC5AC and cystic fibrosis: Conversely, isolates of Staphylococcus aureus, the other major CF pathogen, did not attach to CF mucin (Supplementary Table S2) confirming the outcome of adherence studies with four Gram negative taxa (Vishwanath and Ramphal, 1984) that attachment to mucin is not a general bacterial property, but specific to P. aeruginosa.