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. 2016 Jan 22;5:106. doi: 10.3389/fcimb.2015.00106

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Copyright © 2016 Drumo, Pesciaroli, Ruggeri, Tarantino, Chirullo, Pistoia, Petrucci, Martinelli, Moscati, Manuali, Pavone, Picciolini, Ammendola, Gabai, Battistoni, Pezzotti, Alborali, Napolioni, Pasquali and Magistrali.

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) or licensor 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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STM^ΔznuABC (group B) shows a lower virulence in piglets compared to the STM^wt (group C). (A) Mean values and standard deviation (SD) bars of body temperature of study groups in different time points. In the table on the bottom the levels of significance were reported among groups at different time points. Different letters at each time point represent significant different results (P ≤ 0.05, Dunn's test). (B) Mean values and SD bars of CFU/g of STM^ΔznuABC and STM^wt shed in feces. Results of piglets infected with STM^ΔznuABC were compared to results of STM^wt and differences were statistically significant when ^*P ≤ 0.05, Mann–Whitney test.