White piedra: molecular identification of Trichosporon inkin in members of the same family

Abstract

<jats:p>INTRODUCTION: White piedra is a superficial mycosis caused by the genus Trichosporon and characterized by nodules on hair shaft. METHODS: The authors report a family referred to as pediculosis. Mycological culture on Mycosel® plus molecular identification was performed to precisely identify the etiology. RESULTS: A Trichosporon spp. infection was revealed. The molecular procedure identified the agent as Trichosporon inkin. CONCLUSIONS: White piedra and infection caused by T. inkin are rarely reported in Southern Brazil. The molecular tools are essentials on identifying the Trichosporon species.</jats:p>

White Piedra: Clinical, Mycological, and Therapeutic Experience of Fourteen Cases

“…Other series indicate that the main agent of WP of the head is T. ovoides and that T. inkin predominates in inguinal and scrotal hair [2, 4, 6, 27]. However, in recent reports it is mentioned that in most of the cases identified by molecular biology or proteomics, the predominant species is T. inkin [1, 7, 10, 19, 21, 27-31]. In our series, T. inkin was isolated in 78% of the cases and to a lesser extent T. cutaneum and T. ovoides .…”

Cases of white piedra of the hair on the American continent: a case report and a systematic literature review

“…1 It typically manifests as white to light brown hard nodules, firmly attached to frontal, occipital and parietal scalp hair. [1][2][3][4][5][6][7][8][9] The incidence of white piedra varies from country to country, and men and women of all ages are affected. 1 In Latin America, children and women appear to be the most affected with white piedra of the hair.…”

“…1 In Latin America, children and women appear to be the most affected with white piedra of the hair. [1][2][3][4][5][6][7][8][9] Given the variability of causative agents and the paucity of literature, very little is known about the geographical distribution of white piedra of the hair in American continent countries to help understand its epidemiology and aid in its diagnosis and treatment. In this report, we describe a case of white piedra of the hair in a Peruvian woman.…”

White piedra caused by Trichosporon inkin : a report of two cases in a northern climate

“…Owing to limited databases and/or suboptimal reproducibility of biochemical results, traditional commercially available phenotypic methods (manual and automated systems) may not accurately differentiate Trichosporon species. While limited reports suggest that T. inkin can be accurately identified by commercial biochemical methods, including API ® 20C, molecular techniques have become the method of choice …”

“…White piedra is now predominantly associated with T. inkin , T. cutaneum , T. ovoides and T. loubieri . Trichosporon ovoides and T. inkin usually involve scalp and pubic hair, respectively, although T. inkin has been reported to cause scalp infections …”