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Detection of C. concisus by culture and PCR (dotted column) in saliva samples from healthy individuals in different age groups. The C. concisus culture positivity rate of children 3 to 5 years old was significantly lower than that of the other age groups (P < 0.01 compared to the group of patients 12 to 18 years old and P < 0.05 compared to the remaining groups).
