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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All patients had a positive culture that was preliminarily identified as Hortaea werneckii ; active growth was evident on average after 5. It is important to comment on case 16 Table 1an irregular worker in saltpans, that is considered the natural enviroment of H.

Osmotic adaptation of the halophilic fungus Hortaea werneckii: Its prevalence reaches a peak in highly saline water of crystallization ponds Gunde-Cimerman et al. Hortaea werneckii Micrograph of the fungus Hortaea werneckii Scientific classification Kingdom: Most cases are unilateral but also bilateral infections can be observed Tseng et al.

Cryptococcus neoformans Cryptococcosis Trichosporon spp Trichosporonosis. Facultative or heterotypic synonyms: Biopsies were taken in two patients due to confusion with nevi ; however, perivascular infiltrates were reported in both cases and short fungal filaments could be found on the stratum corneum. Mean overall age was Good treatment results have been reported using miconazole Marks et al.


Using Google Analytics, we can see what content is popular on our websites. Handbook of Tropical Dermatolog y. Hortaea werneckii is a species of yeast in the family Teratosphaeriaceae. The species almost exclusively causes tinea nigra on one or on both hands, sometimes causing similar lesio Current name Classification Type name Basionym Obligate or homotypic synonyms Anamorph synonyms Teleomorph synonyms Facultative or heterotypic synonyms Type hortaeq organism.

Adaptation of extremely halotolerant black yeast Hortaea werneckii to increased osmolarity: Some patients report that throughout the day a change in colour of the macules can be observed: Moldy scuba diving snorkel.

You are free to share – to copy, distribute and transmit the work, under the following conditions: Pullularia werneckii Horta G. Several of them reported to have close contact with plants and grasses. Tinea nigra under dermatoscopy, multiple pigmented lesions; G. Molecular diagnostics of H. Sequence alignments were performed using the software program Clustal X v1. Adaptation of extremely halotolerant black yeast Hortaea werneckii to increased osmolarity: No keratinolysis can be observed and the adhesion to human hands is to be explained by the hydrophobic character of the yeast cells.

Direct inspection of some silicone rubber and plastic samples showed what appeared to be black fungal microcolonies Fig. In our study nearly all cases were diagnosed by direct examination and were confirmed by culture.

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Given the taxonomic uncertainties mentioned above, confirmation of identification with microbiological and molecular tests is compulsory. Mean treatment duration Table 2 was approximately 15 ds; two cases wernecki spontaneous cure.

Google cookies and technologies Google Analytics: This is the case only when patients worry because of confusion with other pigmented skin diseases, such as melanoma. Similarly, fungi that colonize silicone masks, straps and snorkel mouthpieces could gain access by skin and mucous membranes maceration or through the respiratory system during scuba diving activities. Another isolate came from a case of tinea nigra Crous et al.


Cruz2 J. Two patients used to run barefoot along the beach. Recently a similar condition caused by chaetothyrialean black yeast-like fungi was reported Badali et al. Methods for DNA extraction and sequencing were those of Badali et al.

Hortaea werneckii – Wikipedia

Surprisingly, one of the sole infections was located in the interdigital spaces Fig. 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. The two cases located on the plantar region were also informative, as they concerned patients with the habit of running barefoot horraea the seaside, an environment with high salinity and probably the natural niche of the fungus.

Abstract During a survey of black yeasts of marine origin, some isolates of Hortaea werneckii were recovered from scuba diving equipment, such as silicone masks and snorkel mouthpieces, which had been kept under poor storage conditions. ITS sequences show limited variation, and the species is clearly distinct from other, closely related taxa Zalar et al. Diagnostic Microbiology and Infectious Diseases CPMexico Find articles by M. The British Journal of Dermatology.