As can be observed in Fig. 1 and the Supplementary DataSet S1, the overall activity of lysozyme in the three collections (bacteremia, early CF and late CF isolates) was modest, with mean survival percentages circa 50–60%, very similar to those of the reference strains PAO1 and PA14 (54% and 60%). The gene discussed is LYZ; the disease is cystic fibrosis.