Fig. 4From: Genotypic diversity and phenotypic traits of Streptococcus mutans isolates and their relation to severity of early childhood cariesBiofilm formation. Absorbance values (550 nm) obtained for 48 h biofilm of S. mutans genotypes from CF, ECC and S-ECC children. Different letters show statistical difference among the groups, according to ANOVA/Tukey tests (p < 0.05)Back to article page