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. 2019 May 3;10:957. doi: 10.3389/fmicb.2019.00957

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Copyright © 2019 Muchaamba, Eshwar, Stevens, von Ah and Tasara.

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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Strains vary in virulence and growth in BHI and MEM media. (A) Virulence was assessed using a zebrafish infection model. Zebrafish embryos (n = 10 per strain) infected (500 CFU) with different Listeria monocytogenes strains were monitored over 3 days. Zebra fish embryos more rapidly succumbed to serotype 4b compared to serotype 1/2a strains. Kinetic growth assays in (B) BHI and (C) MEM based on OD₆₀₀ measurement showing varied growth of the examined L. monocytogenes strains with Lm3163 displaying the greatest growth capacity and biphasic growth in both media compared to the other strains.