| [facultative and obligate pathogenic moulds in skin affections]. | molds are vegetable microorganisms, which differ from dermatophytes sensitive to griseofulvin, and from yeasts, which do not form aerial mycelium. most of the molds, phytopathogenic or which live from dead organic substances, are apathogenic to humans. only a couple of dozen species can parasitize on the skin, usually together with dermatophytes or yeasts. onychomycoses with molds appear mostly in elderly people, and fungus affections of external auditory passage in seborrheic eczema of the ear. ... | 1978 | 146687 |
| superficial mycoses in saudi arabia. | between june 1988 and december 1990, 1018 cases of superficial mycoses were investigated. diagnosis was confirmed by microscopic examination in 503 cases and the causal agent was isolated in 490 cases. tinea capitis accounted for 47.7% (92.5% in children below 10 years of age). the frequency of other clinical types in descending order was pityriasis versicolor 25.8%, tinea corporis 9%, onychomycosis 5.8%, tinea pedis 4%, intertrigo 3.9% and tinea cruris 2.8%. erythrasma was encountered three tim ... | 1992 | 1445094 |
| [inexistence of piedraia hortae in a suruí indigenous group, rondônia]. | | 1990 | 2104453 |
| antifungal activity of allylamine derivatives. | the antifungal activity of the two allylamine derivatives, naftifine and terbinafine was investigated against 25 clinical isolates of filamentous fungi by agar dilution method. the isolates included aspergillus sp. (10), penicillium sp. (3), cladosporium sp. (3), rhizopus sp. (3), paecilomyces sp. (2), syncephalastrum sp. (1), pyrenochaeta romeroi (1), piedraia hortae (1) and mortierella sp. (1). terbinafine was found to be more active than naftifine, inhibiting 50 per cent (mic 50) and 90 per c ... | 1994 | 8005641 |
| black piedra: the first case treated with terbinafine (lamisil). | a 23-year-old swedish caucasian man presented with typical clinical signs of black piedra of his scalp after his return from 4-months' stay in india. there were black nodules around the hair shafts, and the crushed nodules revealed numerous asci and ascospores on microscopy. piedraia hortae was isolated from the concretions. he was treated with oral terbinafine 250 mg daily for 6 weeks. at the end of treatment no nodules were visible, but 16 days later a few 'new' black concretions appeared. mic ... | 1994 | 8186138 |
| ultrastructural aspects of hair digestion in black piedra infection. | the ultrastructural pattern of human hair infection by piedraia hortae in vivo has been studied. the fungus destroyed the cuticular layers of the hair and was able to penetrate deeply into the cortex. the course of destruction of human hair is described and compared with that produced by other fungi. two well-defined types of cortex digestion were characterized. the slow rate of keratin degradation at the cortex together with the compacted stromatic organization of the nodules are argued as the ... | 1997 | 9061578 |
| x-ray microanalysis of black piedra. | the elements present in the fungal structures produced by piedraia hortae in vivo and in vitro have been investigated using electron microscopy x-ray microanalysis. phosphorus, sulphur and calcium were detected in the nodules which developed on hair and on colonies on culture. these elements belong to the extracellular material that compacts the pseudoparenchymatous organization of the fungus. they may be present due to the capacity of melanin-like pigments to sequester ions and/or they may form ... | 1997 | 9442268 |
| superficial fungal infections. | superficial fungal infections arise from a pathogen that is restricted to the stratum corneum, with little or no tissue reaction. in this seminar, three types of infection will be covered: tinea versicolor, piedra, and tinea nigra. tinea versicolor is common worldwide and is caused by malassezia spp, which are human saprophytes that sometimes switch from yeast to pathogenic mycelial form. malassezia furfur, malassezia globosa, and malassezia sympodialis are most closely linked to tinea versicolo ... | 2004 | 15451228 |