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. 2021 Jan 17;23:100217. doi: 10.1016/j.jctube.2021.100217

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© 2021 Published by Elsevier Ltd.

This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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Fig. 4 — Optical densities (OD) of biofilms formed by a semi-quantitative technique using a violet crystal. The images show the differences in biofilm formation by M. abscessus, M. fortuitum, and M. massiliense at increasing concentrations of sulfamethoxazole Au-Pᴓ₃ (upper images) and sulfamethoxazole ᴓ₂P-Au-Au-Pᴓ₂ (lower images). (*)Statistically significant difference between the positive control and the corresponding concentration. (#) No statistically significant difference between the negative control and the corresponding concentration.