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Figure 4


Figure 4. The antibody level and caries scores of gnotobiotic rats (6 per group) immunized with various treatments. Data are expressed as means and standard deviations of antibody level and caries scores experiments. (A) The salivary and serum-specific anti-PAc antibody levels of gnotobiotic rats. {square} sera anti-PAc IgG. {blacksquare} salivary anti-PAc IgA. (B) Keyes caries scores of gnotobiotic rats. {square} Enamel lesion. {blacksquare} Dentinal slight lesion. X Dentinal moderate lesion. * p < 0.05.