Pseudomonas lung infection is a major cause of morbidity and mortality occurring in multiple clinical settings. Patients with cystic fibrosis have lung colonization with Pseudomonas from an early age, and overwhelming pseudomonal lung infection is the most common cause of death in these patients. In addition, Pseudomonas pneumonia is common in immunocompromised patients and in patients intubated for management of respiratory failure. Particularly worrisome is the increasing frequency of P. aeruginosa isolates that are resistant to all or most currently available antibiotics. The mechanism of virulence of P. aeruginosa includes soluble lectins that recognize host oligosaccharides on mucins and the cell glycocalyx. P. aeruginosa has two soluble lectins - LecA, also known as PA-IL and LecB, also known as PA-IIL. PA-IL binds galactose and PA-IIL binds fucose. Notably, PA-IIL binds the fucose containing Lewis a oligosaccharide with very high affinity and the role of PA-IIL in biofilm formation is shown by the absence of biofilm formation in Pseudomonas mutants lacking PA-IIL and by the efficacy of multivalent fucosyl-peptide dendrimers in preventing and disrupting Pseudomonas biofilm formation. D-galactose and L-fucose have been successfully used to treat P. aeruginosa infection in a case report, which hints at the potential for glycomimetic therapy in CF. These monosaccharides are weak inhibitors of PA-IIL, however, and multivalent glycomimetics will be needed for more effective inhibition.