A 22-year-old man with cystic fibrosis presents with fever and increasing dyspnea. A Gram-negative organism is found in unusually high numbers in the pulmonary mucus. Which virulence factor is most important in colonization and maintenance of the organism in the lungs?
A) Exotoxin A B)Pyocyanin (blue-green pigment) C)Polysaccharide slime D)Endotoxin