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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CPMexico Find articles by J. British Journal of Dermatology Cookies mentioned in the last point are Google analytics cookies that are IP anonymized which means that we cannot trace single users.

Differential diagnosis is essential, due to the extremely different prognosis of the various conditions.

Simple search Basic search Advanced search Search type specimens Search thesaurus Search bibliography. In view of generating a retrospective report, various types of treatment were applied Table 2. The length of the section of DNA sequenced ranged from — base pairs. Amplification and direct sequencing of fungi ribosomal RNA genes for phylogenetics.

Given the taxonomic uncertainties mentioned above, confirmation of identification with microbiological and molecular tests is compulsory.

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Classification of organisms — Fungi. Conidia finally germinate with hyphae wrneckii in yeast-like colonies that gradually change over into filaments to complete the anamorph life cycle. Mean overall age was Only one patient in our study, presented with erythema, also reported moderate itching as was noted in other studies Hughes et al.

The cells appear brown because of melanin production. Any condition s All condition s. Therapy of tinea nigra plantaris. Ecology of halotolerant dothideaceous black yeasts.


Hortaea werneckii

It is known to be phylogenetically affiliated to the order Capnodiales Crous et al. Hortaea werneeckiipolyethylene plasticscuba divingsilicone rubbertinea nigra. In Arenas R, Estrada R eds: Predisposing factors associated with the condition are hyperhydrosis Severo et al.

From Wikipedia, the free encyclopedia. Polymerase chain reaction-mediated genotyping of Hortaea werneckiicausative agent of tinea nigra. 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 the case only when patients worry because of confusion with other pigmented skin diseases, such as melanoma.

Eleven cases originated from coastal zones where patients may have been in contact with substrata of high salinity: Surprisingly, one of the sole infections was located in the interdigital spaces Fig.

The mechanism of the switch is not known. Whole genome sequencing of H. It is considered a commensal that hhortaea lipophilic adhesion to human skin and survives by the assimilation of excretion products [ 32 ]. Pairwise identification Polyphasic identification. As long as its identity with the type of S. Most cases are unilateral but also bilateral infections can be observed Tseng et al.

Rapid treatment of tinea nigra palmaris with cilopirox olamine gel, 0. Twenty-two confirmed cases of tinea nigra were reviewed and patient data recorded Table 1.

Wwerneckii article has been cited by other articles in PMC. Modification of surface properties of biomaterials influences the ability of Candida albicans to form biofilms. Direct inspection of some silicone rubber and plastic samples showed what appeared to be black fungal microcolonies Fig.

It is important to comment on case 16 Table 1an irregular worker in saltpans, that is considered the natural enviroment of H.

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Most cases in our study resolved with topical therapy within two weeks. Register new name hortawa, genus, family, etc Register new type specimen of existing taxa epitype, neotype, etc.

The identification of ten strains was verified with sequences of the internal transcriber spacer regions ITS of the rDNA.

The prevalence and clinical significance of microcolonies when tested according to contemporary interpretive breakpoints for wernneckii against Candida species using E-test. In total, six black yeast isolates were recovered from the samples and all fit the phenotypic characteristics of H.

Tinea nigra by Hortaea werneckii, a report of 22 cases from Mexico

Close mobile search navigation Article navigation. See below for more information. 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.

Symptoms include hyperchromic plaques, in which the fungus may weneckii may not live in commensalism with other organisms Hughes et al.

No teleomorph of this fungus has been found. A homothallic mating locus was found in all sequenced genomes, although one of the mating genes may have been inactivated in some strains. By using this site, you agree to the Terms of Use and Privacy Policy. Candida biofilms have been reported in silicone rubber used in medical devices [ 19—21 ] or in silicone rubber prostheses [ 22 ].

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