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. 2014 Jan 8;7:13. doi: 10.1186/1756-3305-7-13

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Copyright © 2013 Areskog et al.; licensee BioMed Central Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. 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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Faecal egg count patterns. Mean faecal egg count patterns over time (McMaster method), showing a significant difference (p = 0.002) in egg shedding patterns between isolates (groups) A, B and C from 1-45 d.p.i. However, there was no significant difference (p = 0.34) when comparing the egg shedding levels of the three groups before treatment, 1-35 d.p.i. Group A was infected with a propagated IVM-susceptible laboratory isolate and groups B and C with two different Swedish field isolates showing phenotypic clinical IVM resistance in field trials. All calves were treated with injectable IVM at 35 d.p.i.