Relative Effects of Dietary Administration of a Competitive Exclusion Culture and a Synbiotic Product, Age and Sampling Site on Intestinal Microbiota Maturation in Broiler Chickens.

However, there was a clear trend from d 7 to 21, and a significant difference at d 40, when the relative abundance of Bacillus spp. in the Sy treatment was higher than that in the two other dietary treatments.

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Ruminococcaceae, from d 14, and Lachnospiraceae, the Clostridiales vadinBB60 group, Enterobacteriaceae, and Anaeroplasmataceae, from d 7, showed a decreasing trend, and the initially high frequency decreased significantly until d 40.

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