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. 2021 Apr 28;12:672353. doi: 10.3389/fimmu.2021.672353

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Copyright © 2021 Alam, Gangiredla, Hasan, Barnaba and Tartera

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Comparative representation of relative abundance of fecal microbiota at the family level in young-adult and old mice before and after Listeria monocytogenes infection. (A) Showing high abundance bacteria (>10%) at the family level. (B) Intermediate abundance level (<6%) bacteria at the family level. (C) Low level (<2%) bacteria at the family level. Taxonomic composition for the abundant bacteria at the family level was generated from k-mer analyses based on taxonomic profiling. Data from mean ± SEM from a representative experiment using 4–6 mice. **p < 0.01.