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. 2013 May 23;8(5):e64204. doi: 10.1371/journal.pone.0064204

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This is an open-access article distributed under the terms of the Creative Commons Public Domain declaration, which stipulates that, once placed in the public domain, this work may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose.

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Competition index (CI) was calculated as the ratio of the WT to the Δsrr1 mutant in each tissue, normalized for the ratio of strains within the inoculum. Circles represent data from individual animals. A CI above 10⁰ (dashed line) indicates a competitive disadvantage of Δsrr1 compared with WT. Horizontal black bars indicates means of CIs.