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. 2018 Nov 7;8:16463. doi: 10.1038/s41598-018-34694-z

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© The Author(s) 2018

Open Access This 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 license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license 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 license, visit http://creativecommons.org/licenses/by/4.0/.

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Association of MexAB-OprM regulators and MexEF-OprN regulators with biofilm formation, swarming, pigment, oprD gene and antibiotic resistance. SBP: Strong biofilm producer; Swarming: Microorganisms showing swarming motility; Pigment: Presence of pigment; OprD (RM): Presence of relevant modifications in OprD (frameshifts + premature STOPs + no amplification); Carbapenem: resistance to carbapenems; MDR: Multidrug resistance. (a) MexAB-OprM regulators. IM: Irrelevant modifications (amino acid substitution + amino acid insertions + amino acid deletions); RM. Relevant Modifications (frameshifts + premature STOPs + no amplification); *p: 0.006; **p < 0.0001. (b) MexEF-OprN regulators. PA14: Sequence identical to PA14; NA: no amplification. *p: 0.004. Only the isolates presenting the genotypes PA14/PA14 (47 isolates) and NA/PA14 (34 isolates) were analysed.