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. 2010 Mar 19;48(5):1949–1951. doi: 10.1128/JCM.01941-09

FIG. 2.

FIG. 2.

ATP concentrations in the culture supernatants of isolates. After 16 h of culture, the ATP concentrations of each filtered culture supernatant were measured using a luciferase reaction method. Five and two strains of Enterococcus gallinarum isolated from mice and humans, respectively, were examined. Three Escherichia coli strains, three Staphylococcus aureus strains, three Enterococcus faecalis strains, and three Enterococcus faecium strains were also examined, and the mean value(s) obtained with each species is shown. Light measurements for each sample were obtained in triplicate. The error bars indicate standard deviations. Enterococcus gallinarum isolated from mice and humans showed extracellular ATP secretion. To compare the results of each group (ATP-secreting type bacteria and non-ATP-secreting type bacteria), the t test was used (P < 0.0001).