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. 2015 Jun 19;46(1):69. doi: 10.1186/s13567-015-0190-3

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© Martcheva et al. 2015

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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R ₀ of vertical transmission. Figure shows the epidemiological reproduction number R₀ as a function of the internal bacterial load M _i ^* when the only mechanism of transmission is vertical transmission.