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. 1976 Aug;2(2):96-8.

Six-hour pigmentation test for the identification of Cryptococcus neoformans

R L Hopfer, D Gröschel

Six-hour pigmentation test for the identification of Cryptococcus neoformans

R L Hopfer et al. J Clin Microbiol. 1976 Aug.

Abstract

Cryptococcus neoformans colonies can be identified within 6 h using paper disks containing caffeic acid and ferric citrate. Indentification is based on the development of a dark brown pigment. Saprophytic Cryptococcus species and common clinically isolated yeasts do not develop the brown color. The concentration of the reagents and the method of storage of the impregnated paper disks are critical for the rapid and specific development of the pigment.

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References

    1. J Clin Microbiol. 1976 AUG;2(2):115-20 - PubMed
    1. Appl Microbiol. 1971 Mar;21(3):541-2 - PubMed
    1. Appl Microbiol. 1972 Nov;24(5):824-30 - PubMed
    1. Appl Microbiol. 1971 Sep;22(3):478-9 - PubMed
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