Distribution of in vitro rhamnolipid production in P. aeruginosa isolates from CF patients at different stages of lung infection.

The box and whisker plots represent the median (thick line inside the box), 10, 25, 75 and 90 centiles of the in vitro rhamnolipid production (µg/ml) of P. aeruginosa isolates from intermittently colonized and chronically infected patients; Mann-Whitney test was used to investigate the significance of the difference between the groups.