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. 2018 Jun 15;9:1325. doi: 10.3389/fmicb.2018.01325

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Copyright © 2018 Xiaoli, Figler, Goswami Banerjee, Hayes and Dudley.

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) and the copyright owner 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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Growth curves (A) and plaque counts for C600 and its three bamA mutants (B) and their Stx2a levels (C) after co-incubating with E. coli O157:H7 strain PA2. C600EC, C600ST, C600DD represents three mutants expressing heterologous bamA from Enterobacter cloacae, Salmonella Typhimurium, and Dickeya dadantii, respectively. Error bars report standard error of the mean from three biological replicates. BDL represented below the detection limit of 10 PFU/mL. One-way ANOVA was used and Stx2a levels in co-culture marked with an asterisk were significantly higher than the PA2 monoculture (Dunnett's test, p < 0.05).