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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Conidia finally germinate with hyphae resulting in yeast-like colonies that gradually change over into filaments to complete the anamorph life cycle.
Tinea nigra by Hortaea werneckii, a report of 22 cases from Mexico
Apart from these hybridization events, no signs of sexual reproduction were found. In fact it is 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 ].
All patients had a positive culture that was preliminarily identified as Hortaea werneckii ; active growth was evident on average after 5.
Click on the language titles to launch them. In our study nearly all cases were diagnosed by direct examination and were confirmed by culture. Studies in Mycology Pairwise identification Polyphasic identification. Three plastic dock fenders and wood boards of the dock with visible moldy growth were also sampled using the same technique.
Although scuba diving equipment should be cleaned and dried at the end of each day’s dive to prevent salt build-up and reduce microbial contamination, it is not unusual to see silicone scuba diving equipment, such as silicone masks, straps and snorkel mouthpieces, with fungal growth.
Handbook of Tropical Dermatolog y. Swiss Agency for the Environment, Forests and Landscape. Feuilhade de Chauvin M Conidia appear as pigmented yeast cells with a dark central septum, the outer wall later becoming thick-walled, heavily pigmented.
In all cases, the obtained isolates were morphologically identified as Hortaea werneckii and the identification of ten isolates was retrospectively confirmed with the help of sequences of the internal transcribed spacer regions of the ribosomal DNA.
The remaining 11 patients came from metropolitan zones and did not provide any specific information Fig. Perhaps, the selective common factor to these substrates is a relatively high salt concentration and possibly the synthetic polymers of wernsckii polyethylene plastic and silicone rubber. International Journal of Dermatology Pairwise sequence alignments Polyphasic identifications.
Recently Ng et al. The latter medium was prepared and used in this study for the selective isolation of H. The two cases located on the plantar region were also informative, as they concerned patients with the habit of running barefoot along the wernecii, an environment with high salinity and probably the natural niche of the fungus.
Hortaea werneckii – Wikipedia
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.
Colonies of Hortaea werneckii grow on a standard media within 5—8 ds. Hortaea werneckii is best known from sub tropical climates and lives in environments with wernec,ii water activity such as sea water, natural or man-made saltpans Zalar et al.
Hortaea werneckii Micrograph of the fungus Hortaea werneckii Scientific classification Kingdom: Biopsies were taken in two patients due to confusion with nevi ; however, perivascular infiltrates were reported werneciki both cases and short fungal filaments could be found on the stratum corneum. Twenty-two confirmed cases of tinea nigra were reviewed and patient data recorded Table 1. The cells appear brown because of melanin production.
The species almost exclusively causes tinea nigra on one or on both hands, sometimes causing similar lesio Archives of Dermatology The growth impairment of salinized fenugreek Trigonella foenum-graecum L.
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Silicone skirts and straps of three scuba diving masks, mouthpieces of snorkels and a polyethylene plastic bag were sampled by rubbing the surfaces with sterile cotton swabs, pre-moistened in sterile physiological solution.
Whole genome sequencing of H.
Tinea nigra is considered a rare disease. Malassezia furfur Tinea versicolor Pityrosporum folliculitis Trichosporon White piedra.
Treatment of tinea nigra palmaris with miconazole topically. Citing articles via Web of Science 2. No other cookies than the ones mentioned above are used on our websites.