Figure 4

Doubling times calculated from the growth curves of E. faecium strains. The doubling times, in minutes, from early- to late- exponential phase were determined for each of the E. faecium strains. The values were plotted according to ST. The ST203 strains appear to grow at a faster rate than the ST17 strains and statistical analysis performed using the two-tailed Mann Whitney test demonstrated that the difference was statistically significant (p = 0.0304).