Fig. 4

Results of phenotypic experiments without significant differences. Red symbols: K. pneumoniae ST307 outbreak isolates; yellow symbols: K. pneumoniae non-ST307 internal isolates; blue symbols: K. pneumoniae external isolates. Red circle: occurrence of plasmid 1 in K. pneumoniae ST307 outbreak isolates and PBIO1961; orange circle: occurrence of plasmid 2 in K. pneumoniae ST307 outbreak isolates, PBIO1979, and PCV1935; red open circle: incomplete plasmid 1 in PCV1935. Isolates belonging to ST307 are highlighted in dark gray, and all other isolates in light gray. a Results of growth experiments in LB medium are given as mean values of CFU/mL for each isolate over 5 h. Abbreviations: n.s., not significant. b Results of serum survival experiments are given as mean values and standard deviation of CFU/mL for each isolate before (inoculum: circles) and after 4 h of incubation in human serum (squares). c Results of biofilm formation experiments are given as absorbance values (mean with coefficient of variation) of crystal violet at 590 nm for each isolate after 3 h of incubation. d Results of desiccation tolerance experiments are given as mean values and standard deviation of colony-forming units (CFU) per milliliter (CFU/mL) for each isolate before (inoculum: circles) and after 6 days of desiccation (squares)