An outbreak of scalp white piedra in a Brazilian children day care

Roselino, Ana Maria Ferreira; Seixas, Ana Beatriz; Thomazini, José Antônio; Maffei, Carlos Eduardo Moreira

doi:10.1590/s0036-46652008000500011

Cited by 19 publications

(18 citation statements)

References 14 publications

(24 reference statements)

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“…WP can present at all ages, although there is a prevalence of up to 89% in subjects < 15 years and most often in girls [4, 6, 9-12], similar to our findings. The development of the disease remains unknown, although it is known that the various species of Trichosporon that cause WP have been reported as part of the microbiota of skin and mucous membranes.…”

Section: Discussionsupporting

confidence: 91%

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

Bonifáz¹,

Tirado‐Sánchez²,

Santibáñez³

et al. 2018

Skin Appendage Disord

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Background: White piedra (WP) is an asymptomatic superficial mycosis that affects the hair stems, forming whitish nodules caused by various species of the genus Trichosporon. Objective: To present a case series of WP of the head, its epidemiological data, as well as clinical, mycological, and therapeutic experience. Methods: We conducted a 12-year retrospective and observational study of WP cases tested by dermoscopy, mycological study, and the identification of species through morphology, biochemistry, and proteomics (matrix-assisted laser desorption/ionization time-of-flight mass spectrometry). The treatment was based on ketoconazole shampoo as well as keratolytics. Results: We included 14 cases of WP, all located in the head and 1 case with both head and scrotum affected. Nine cases (64.3%) presented in children aged < 15 years. The majority of the cases (13/14, 92.8%) were women. Two cases were associated with hyperkeratosis and intertrigo. Most patients had long hair and excessive moisture. In all cases hair nodules were observed and Trichosporon inkin (11/14, 78.6%) was usually isolated. Eleven cases (78.6%) were cured by administering 2% ketoconazole shampoo. Conclusion: WP was observed in school-age girls. The diagnosis was based on the observation of hair nodules and its main etiologic agent was T. inkin, with good response to treatment in most cases.

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Section: Discussionsupporting

confidence: 91%

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

Bonifáz¹,

Tirado‐Sánchez²,

Santibáñez³

et al. 2018

Skin Appendage Disord

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“…This is the first time since the creation of the new classification scheme of the genus Trichosporon (27,28,32) that 6 of the 7 medically important species have been isolated and identified from the normal perigenital region. Although the natural habitat of Trichosporon is considered to be the soil, little is known about its colonization in normal skin (6).…”

Section: Trichosporon Isolatesmentioning

confidence: 99%

“…cutaneum was recently identified in an outbreak of scalp white piedra in a Brazilian child daycare center (28).…”

Section: Trichosporon Isolatesmentioning

confidence: 99%

Trichosporon species isolated from the perigenital region, urine and catheters of a Brazilian population

Silvestre¹,

Miranda²,

Camargo³

2010

Braz. J. Microbiol.

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The present study aimed to 1) determine the colonization rates of medically important Trichosporon species on normal perigenital skin and 2) determine the isolation rates of Trichosporon spp. isolated from the urine and catheters of Brazilian patients hospitalized in the Intensive Care Unit (ICU). The overall colonization rate of Trichosporon spp. was 11.15% (112 isolates). The most common species isolated from normal perigenital skin was T. cutaneum (29.46%), followed by T. asteroides (20.53%), T. ovoides (15.17%), T. inkin (10.71%), T. mucoides (8.92%), and T. asahii (6.25%). From urine and catheters, T.asahii was the species most commonly isolated (76.5%; n =23), followed by T. inkin (16.6%; n = 5) and T. asteroides (6.6%; n = 2). In addition, the highest isolation rate occurred in subjects in the 71-to 80-yearold age range (36.7%; n= 11), followed by 61 to 70 (26.7%; n = 8), 51 to 60 (13.3%; n = 4), 31 to 40 (13.33%; n = 4), and 41 to 50 (10%; n =3). We concluded that 6 medically important species of the genus Trichosporon colonize the perigenital region in a normal population. The identification of these species is possible by means of classical methods but often requires repeated analyses repetitions due to difficulties in the assimilation process. In contrast, only 3 species of Trichosporon were isolated from urine and catheters.

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“…Out of the 20 reported cases, 90% were observed in children under 9 years old, and all were in female patients 8,9 . Most were correlated with informed behavior of routinely using emollient creams on hair.…”

Section: Introductionmentioning

confidence: 99%

“…White piedra is an uncommon diagnosis in the southeast of Brazil, although some outbreak of scalp white piedra has been reported 8,9 . Out of the 20 reported cases, 90% were observed in children under 9 years old, and all were in female patients 8,9 .…”

Section: Introductionmentioning

confidence: 99%

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

Richini-Pereira

Camargo

Bagagli

et al. 2012

Rev. Soc. Bras. Med. Trop.

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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.

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An outbreak of scalp white piedra in a Brazilian children day care

Cited by 19 publications

References 14 publications

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

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

Trichosporon species isolated from the perigenital region, urine and catheters of a Brazilian population

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

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