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. 2019 Aug 26;57(9):e00352-19. doi: 10.1128/JCM.00352-19

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Copyright © 2019 Su et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 International license.

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FIG 2 — Phenotypic methodology. (A) Christensen’s urea slants. Negative-control (left), weak (middle), and positive (right) results are shown. (B) Keratin azure agar. From left to right, negative (score, 1), weak (score, 2), positive (score, 3), and strongly positive (score, 4) results are shown. (C to F) Hair perforation by the positive control, Nannizzia gypsea CBS 130813 (C, D), Trichophyton rubrum (E), and Trichophyton soudanense (F). (G, H) Tween 80 opacity; (G) negative result for T. rubrum; (H) positive result for T. violaceum.