[Pigment Formation by Trichophyton rubrum: Differentiation between T. rubrum and T. mentagrophytes on Serum Albumin Agar (author's transl)].
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.
D000362:Agar; D006801:Humans; D006863:Hydrogen-Ion Concentration; D010860:Pigments, Biological / Q000032:analysis*; D012710:Serum Albumin, Bovine; D014249:Trichophyton / Q000032:analysis / Q000145:classification*
D010860:Pigments, Biological; D012710:Serum Albumin, Bovine; D000362:Agar
Uber die Pigmentbildung bei Trichophyton rubrum. Differenzierung zwischen T. rubrum and T. mentagrophytes auf Serum-Albumin-Agar