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. 2021 May 6;13:30. doi: 10.1186/s13099-021-00425-5

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© The Author(s) 2021

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. 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 in a credit line to the data.

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Fig. 7 — A Venn analysis of the Johne animals, comparing phage/qPCR with the three conventional methods. In combination with fecal PCR, 100% of the 32 Johne animals tested MAP positive, with 15 cows positive in both tests (p(kappa)= 0.02) and no cows testing negative by both tests (a). When combined with plasma IFN-γ, there were four cows negative by both tests (p(kappa) = NS: b). When combined with ELISA there were six cows negative by both tests (p(kappa) = NS: c)