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Proportions of various species or genera of cultivable bacteria related to total cultivable bacterial numbers in newborns and infants sampled monthly through the first 12 months after birth derived from mothers maintained on an oral hygiene regimen (OH) or with naturally occurring gingivitis/periodontitis (G/P). Each point denotes the mean from 5 infant animals or groups at the various time points, and the error bars represent 1 SEM.
