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. 2017 Jan 23;8:4. doi: 10.3389/fmicb.2017.00004

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Copyright © 2017 Dotto, Lombarte Serrat, Cattelan, Barbagelata, Yantorno, Sordelli, Ehling-Schulz, Grunert and Buzzola.

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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Impact of SAL and SAL plus iron on S. aureus monitored by FTIR spectroscopy. PCA was carried out on second derivative, vector-normalized FTIR spectra in the spectral range for glycopolymers (1200–800 cm⁻¹). (A) Newman strain, planktonic culture. (B) Biofilm formed by the Newman strain. In both cases bacteria were grown in TSBg with or without 2 mM of SAL or SAL plus 50 μM FeSO₄. Clusters are indicated with ellipses. Symbols are defined in the figure. The relative contribution of each principal component is indicated in parentheses.