Hortaea werneckii (Horta) Nishim. & Miyaji, Japanese Journal of Medical Mycology 26 (2): () [MB#]. Hortaea werneckii is a dematiaceous yeast that inhabits the soil, particularly in tropical and subtropical climates. It is halophilic and has also been isolated from . Abstract. During a survey of black yeasts of marine origin, some isolates of Hortaea werneckii were recovered from scuba diving equipment, such as silicone .

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We evaluate retrospectively twenty-two confirmed cases of tinea nigra from a total of eleven yr — and discuss the epidemiology, clinical features and treatment of this disease. We use cookies in a very wernecmii number of scenarios that are all present to help the users to have an easier werneckik. In some reports it even was misidentified as melanomas.

Hortaea werneckii Micrograph of the fungus Hortaea werneckii Scientific classification Kingdom: Hortaea werneckii Tinea nigra Piedraia hortae Black piedra.

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In fact it werneckui considered an imported fungal infection in Europe [ 34 ] being much more prevalent in warm, humid parts of the world, such as the tropical regions of Central America, South America, Africa, and Asia and infrequently in USA and Australia [ 5—7 ]. It is an extremely halotolerant species and the dominant black yeast species in hypersaline waters at salinities above 3.


In view of generating a retrospective report, various types of treatment were applied Table 2. Black fungal growth is clearly visible on the silicone mouthpiece. Tinea nigra by Hortaea werneckiia report of 22 cases from Mexico. Swiss Agency for the Environment, Forests and Landscape. Both cases had a clinical history of hyperhydrosis probably resulting in saline plantar cutaneous conditions and adhesion wernedkii the fungus Fig. Wernsckii may be revealed by hortaex, which is a technique allowing the observation of fungal elements with certainty, particularly when flanked with microbiological tests Smith et al.

This species is the agent of tinea nigra which is a rarely diagnosed superficial mycosis in Europe. Candida albicans Candidiasis Oral Esophageal Vulvovaginal Chronic mucocutaneous Antibiotic candidiasis Candidal intertrigo Candidal onychomycosis Candidal paronychia Candidid Diaper candidiasis Congenital cutaneous candidiasis Perianal candidiasis Systemic candidiasis Erosio interdigitalis blastomycetica C.

This is an exceptional case, in which the fungus behaved as an opportunistic pathogen and was the causative agent of a systemic phaeohyphomycosis.

Google Wikimedia Wikipedia Wikispecies. ITS sequences show limited variation, and the species is clearly distinct from other, closely related taxa Zalar et al.

Using Google Analytics, we can see what content is popular on our websites. In total, six black yeast isolates were recovered from the samples and all fit the phenotypic characteristics of H.

Hortaea werneckii Horta Nishim. Conidia finally germinate with hyphae resulting in yeast-like colonies that gradually change over into filaments to complete the anamorph life cycle. The frequency of the disorder may be higher, but due to its asymptomatic nature and the possibility of spontaneous cure, patients seldom reach the doctor’s office.


Eleven cases originated from coastal zones where patients may have been in contact with substrata of high salinity: Mucorales Mucormycosis Rhizopus oryzae Mucor indicus Lichtheimia corymbifera Syncephalastrum racemosum Apophysomyces variabilis.

Journal List Stud Mycol v. Tinea nigra under dermatoscopy, multiple pigmented lesions; G.

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Current name Classification Type name Basionym Obligate or homotypic synonyms Anamorph synonyms Teleomorph synonyms Facultative or heterotypic synonyms Type of organism. Tinea nigra is considered a rare disease.

CPMexico Find articles by L. Archived from the original on The disorder is rare in Europe Hughes et al.

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Hortaea werneckii Horta Nishim. You may be, however, able to change your browser settings to cause your browser to refuse cookies in general, block third party cookies or to indicate when a cookie is being sent. The use of chlorazol black Feuilhade de Chauvin as a clearing solution is not recommended because this reagent stains fungal elements black, which interferes with distinction from dermatophyte hyphae.

The majority ewrneckii patients were without apparent specific predisposing factors for fungal infection.