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Dominant bacterial groups in the gut of household children at day 0 and day 8 at the taxonomic level of family. Alphabets in the bar reflect bacterial families as indicated below: P, Prevotellaceae; E, Enterobacteriaceae; Le, Leuconostocaceae; R, Ruminococcaceae; La, Lachnospiraceae; St, Streptococcaceae; B, Bifidobacteriaceae; Pep, Peptostreptococcaceae; S, Succinivibrionaceae; Sp, Spirochaetaceae; V, Veillonellaceae; L, Lactobacillaceae
