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 .

Author: Bak Doule
Country: Ghana
Language: English (Spanish)
Genre: Personal Growth
Published (Last): 11 November 2012
Pages: 327
PDF File Size: 11.79 Mb
ePub File Size: 9.45 Mb
ISBN: 797-3-53143-590-2
Downloads: 71575
Price: Free* [*Free Regsitration Required]
Uploader: Faull

Dermoscopy in the diagnosis of tinea nigra plantaris. All patients had a positive culture that was preliminarily identified as Hortaea werneckii ; active growth was hotraea on average after 5.

There was a problem providing the content you requested

Archives of Dermatology These cookies allow us to see information on user website activities including, but not limited hoftaea page views, source and time spent on a website. Catalogue of Life CoL.

Type specimen or ex type: This is the case only when patients worry because of confusion with other pigmented skin diseases, such as melanoma.

The length of the section of DNA sequenced ranged from — base pairs. See below for more information. Hortaea werneckii Tinea nigra Piedraia hortae Black piedra. This is probably due to the fact that the fungus is cleared from the hands as a result of daily activities.

Blastomyces dermatitidis Blastomycosis North American blastomycosis South American blastomycosis Sporothrix schenckii Sporotrichosis Penicillium marneffei Penicilliosis. Conidia appear as pigmented yeast cells with a dark central septum, the outer wall later becoming thick-walled, heavily pigmented.

The occurrence of this fungus in Spain is also an unexpected finding because cases of tinea nigra in this country are practically not seen.


Tinea nigra is a superficial mycosis caused by Hortaea werneckii. Journal of Dermatology They are sent to a computer by website operators or third parties. Abstract During a survey of black yeasts of marine origin, some isolates derneckii Hortaea werneckii were recovered from scuba diving equipment, such as silicone masks and snorkel mouthpieces, which had been kept under poor storage conditions.

Summary of treatment of tinea nigra. The majority of patients were without apparent specific predisposing factors for fungal infection. Mean treatment duration Table 2 was approximately 15 ds; two cases presented spontaneous cure. The disorder is rare in Europe Hughes et al. Other fungal links Bibliography links General links Molecular links Specimens and strains links.

Predisposing factors associated with the condition are hyperhydrosis Severo et al. Studies in Mycology Twelve out of 22 patients were adults and the remaining were adolescents and children.

Receive exclusive offers and updates from Oxford Academic. Direct KOH examinations provide us with quick information and demonstrate the short, tortuous, thick, light brown hyphae, which may occasionally be darkened, and sometimes present short filaments and yeast-like cells.

It is important to comment on case 16 Table 1an irregular worker in saltpans, that is considered the natural enviroment of H. The authors alone hoetaea responsible for the content and the writing of the paper. The lesions are invariably flat, not elevated and without inflamed margins; they consist of pigmented, mostly brownish, irregular and asymptomatic macules wernrckii with well-defined borders, and are covered by fine scaling.

Hortaea werneckii

Tinea nigra has generally been considered to be a tropical disease, being rarely diagnosed in Europe. A homothallic mating locus was found in all sequenced genomes, although one of the mating genes may have been inactivated in some strains.


Simple search Basic search Advanced search Search type specimens Search thesaurus Search bibliography. Tinea nigra under dermatoscopy, multiple pigmented lesions; G. Selected sequences of H. Hortaea werneckii isolated from silicone scuba diving equipment in Spain F.

Most cases in our study resolved with topical therapy within two weeks.

ITS sequences show limited variation, and the species is clearly distinct from other, closely related taxa Zalar et al. Tinea nigra has a major clinical relevance because it can be mistaken for various types of nevi.

Exophiala werneckii causing tinea nigra in Scotland. The authors report no conflicts of interest.

The mechanism of the switch is not known. Contact our curators Dr. Run Zhang 1 and Dr. We use cookies in a very limited number of scenarios that are all present to help the users to have an easier experience. Hortaea werneckii Micrograph of the fungus Hortaea werneckii Scientific classification Kingdom: Most typically, it affects palms of hands but is occasionally found on other parts of the body. Marine culturable yeasts in deep-sea hydrothermal horhaea The information is depersonalized and is displayed as numbers, meaning it cannot be traced back to individuals.

Phaeoannellomyces and the Phaeococcomycetaceae, new dematiaceous blastomycete taxa. Silicone rubber is also used to make the skirts and straps on most modern scuba diving masks. Wernecki infection and mesomycetozoea B35—B49—