Dynamic construction of gut microbiota may influence allergic diseases of infants in Southwest China.

In the diseased group, the relative abundance of Firmicutes demonstrated an increasing trend after birth from 30.79% in day 0 samples (meconium) to 43.41% in day 7 samples, following which it showed a downward trend until day 15 and reached a trough (24.23%); it gradually increased to 36.36% in month 12 samples, which was similar to the levels observed in day 0 samples (meconium) of the healthy group (Fig. 4 c).

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In the healthy group, the relative abundance of Firmicutes showed a decreasing trend following birth—from 38.48% in day 0 samples (meconium) to 25.83% in day 7 samples.

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