In Sinorhizobium fredii HH103, osmotic nonionic stress activates swarming while it abolishes swimming motility [64], and in Pseudomonas aeruginosa, the stringent stress response is essential for surfing motility, a specialized type of surface translocation that is induced by mucin, the viscous mucus produced by cystic fibrosis-affected lungs [65]. This evidence concerns the gene MUC5AC and cystic fibrosis.