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. 2020 Jul 14;8(3):384. doi: 10.3390/vaccines8030384

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© 2020 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Experiment 2: Isotype profile of antibodies against S. suis serotype 7 (A) or serotype 9 (B) in sows. Blood samples were collected one and five weeks before farrowing from 20 vaccinated and 20 non-vaccinated sows to follow the immune response. The vaccination protocol is shown in Figure 1. IgM, IgG1 and IgG2 titers were determined by ELISA. Antibody titers for individual sows are shown with horizontal bars representing mean ± SEM. Values significantly different are shown in the graph with corresponding p value.