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Trichosporon inkin
(Oho ex Ota) do Carmo-Sousa & van Uden (1967)
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Colonies on Sabouraud dextrose agar at 25°C are finely cerebriform, lack a marginal zone, and often crack the agar. Colony size is 9-12 mm after 7 days incubation.
On cornmeal following 72 hours incubation at 25°C, it produces true hyphae that disarticulate into rectangular arthroconidia measuring approximately 3-5 x 4-16 µm. Appressoria and sarcinae (septations within the arthroconidia) are formed [928].
This isolate is urease positive, fails to grow on media containing cycloheximide, grows at 37°C, and has variable growth at 42°C. Type strains were isolated from the hair of a patient with white piedra of the groin. The species has been reported as an agent of peritonitis [493], endocarditis[1870], vulvovaginal trichosporonosis[1417], an invasive infections in two siblings with chronic granulomatous disease[2460], and of a lung abscess presenting as a penetrating chest wall mass[1810]. This species is the most frequently associated with white piedra of the groin, and in one repor, coexistsing with Candida parapsilosis[2215]. It has also been recovered from urine. Trichosporon inkin may be distinguished from T. asahii by formation of appressoria and from T. ovoides by lack of a marginal zone, lack of growth on cycloheximide, and development of sarcinae (septations within the arthroconidia). Source of infections is also important in separating the species, with T. inkin being primarily isolated from white piedra of the groin and T. ovoides being primarily implicated in white piedra of the scalp [925].
| AMB |
ITRA |
FLU |
5FC |
KETO |
| 0.125 µg/ml=1 |
<0.0015 µg/ml=1 |
0.25 µg/ml=1 |
32 µg/ml=1 |
0.06 µg/ml=1 |
| 0.25 µg/ml=1 |
0.03 µg/ml=1 |
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|
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| Drug/N |
AMB/2 |
ITRA/2 |
FLU/1 |
5FC |
KETO/1 |
| MIC Range |
0.125-0.25 |
<0.015-0.03 |
0.25 |
32 |
0.06 |
* Fungus Testing Laboratory unpublished data (NCCLS M27-A2)
PubMed
GenBank
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References
493. Crowther, K. S., A. T. Webb, and P. H. McWhinney. 2003. Trichosporon inkin peritonitis in a patient on continuous ambulatory peritoneal dialysis returning from the Caribbean. Clin Nephrol. 59:69-70.
925. Gueho, E., L. Improvisi, G. S. de Hoog, and B. Dupont. 1994. Trichosporon on humans: a practical account. Mycoses. 37:3-10.
928. Gueho, E., M. T. Smith, G. S. de Hoog, G. Billon-Grand, R. Christen, and W. H. Batenburg-van der Vegte. 1992. Contributions to a revision of the genus Trichosporon. Antonie Van Leeuwenhoek. 61:289-316.
1417. Makela, P., D. Leaman, and J. D. Sobel. 2003. Vulvovaginal trichosporonosis. Infect Dis Obstet Gynecol. 11:131-3.
1810. Piwoz, J. A., G. J. Stadtmauer, E. J. Bottone, I. Weitzman, E. Shlasko, and C. Cunningham-Rundles. 2000. Trichosporon inkin lung abscesses presenting as a penetrating chest wall mass. Pediat Inf Dis J. 19:1025-1027.
1870. Ramos, J. M., M. Cuenca-Estrella, F. Gutierrez, M. Elia, and J. L. Rodriguez-Tudela. 2004. Clinical case of endocarditis due to Trichosporon inkin and antifungal susceptibility profile of the organism. J Clin Microbiol. 42:2341-2344.
2215. Taj-Aldeen, S. J., H. I. Al-Ansari, T. Boekhout, and B. Theelen. 2004. Co-isolation of Trichosporon inkin and Candida parapsilosis from a scalp white piedra case. Med Mycol. 42:87-92.
2460. Wynne, S. M., K. J. Kwon-Chung, Y. R. Shea, A. C. Filie, A. Varma, P. Lupo, and S. M. Holland. 2004. Invasive infection with Trichosporon inkin in 2 siblings with chronic granulomatous disease. J Allergy Clin Immunol. 114:1418-24.
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