Fig. 2From: Salivary microbiome and metabolome analysis of severe early childhood cariesAlpha-diversity of bacterial communities of severe early childhood caries (SECC) and caries-free subjects (CF). Microbiota alpha-diversity as calculated by abundance-based coverage estimator (ACE) index (a), chao1 index (b) and shannon index (c) of saliva samples in both groups. *p < 0.05, **p < 0.01Back to article page