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. 2014 Nov 4;9(11):e112010. doi: 10.1371/journal.pone.0112010

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© 2014 Zou et al

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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Survival of E99, SPB03 and SPB04 based on colony-forming units per 10⁵ RAW264.7 macrophages, infected at a MOI of 100, after 2, 24, 48, and 72 hours post infection. Experiments were performed in triplicate. Significant differences (*P<0.05) were found at 24, 48, and 72 hours between wild-type and mutant.