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  • Title: [Pigment Formation by Trichophyton rubrum: Differentiation between T. rubrum and T. mentagrophytes on Serum Albumin Agar (author's transl)].
    Author: Staib F, Engelbert B, Berger R, Fröhlich B.
    Journal: Zentralbl Bakteriol Orig A; 1977; 237(2-3):395-404. PubMed ID: 15390.
    Abstract:
    On serum albumin agar (bovine albumin) with initial pH-values of 5.0-6.0, Trichophyton rubrum showed a yellow pigmentation, and on the same medium with an initial pH-value of 7.0, a red pigmentation. Strains of Trichophyton mentagrophytes have never shown pigmentation until now, The scarce growth (submerged) of T. rubrum on serum albumin agar is associated with a pigment formation that may be used for diagnostic purposes. It could be read within 3-7 days. Serum albumin agar with the initial pH-value of 5.0 was introduced in 1964 for the detection of the strain-specific proteolytic activity of Candida albicans.
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