Figure 2.

Mean counts of the 39 ‘new’ bacterial species in periodontal health and disease of all evaluated sites (a) and in shallow sites (b). The species are listed in descending order according to the average percentage of colonized sites in the periodontitis group (Figure 1). The statistical significance of differences between groups was assessed using the Mann-Whitney test (p < 0.05). (* in black) indicates statistical significance adjusted for multiple comparisons; (* in red) indicates unadjusted statistical significance.