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. 2018 Nov 27;6(4):118. doi: 10.3390/microorganisms6040118

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© 2018 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Principal component analysis (PCA) of bacterial community structures in the three treatments of the ileum (A), colon (B) and rectum (C). The percentage of variation explained by the x axis represented by PC1 and the y axis represented by PC2 are indicated in the axis. A = ileum; B = colon and C = rectum. CON = control; LCA = low cocktail of antibiotics concentration; LSA = low concentration of single antibiotic. The percentage of variation explained by PC1 and PC2 are indicated in the axis, and the ellipses represented with 95% confidence. R-values closer to 0 denote groups not significantly different from one another, while values closer to 1 denote a highly different community composition, P value ≤ 0.05 is significantly different.