Studies on Trichophyton rubrum with particular reference to "hyperpigmented" form.

A Roy

doi:10.1007/bf02132423

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Studies on Trichophyton rubrum with particular reference to "hyperpigmented" form.

A Roy

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A Roy. 1965-11-01. Studies on Trichophyton rubrum with particular reference to "hyperpigmented" form.. https://doi.org/10.1007/bf02132423

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PubMed1977

Trichophyton fischeri sp. nov.: a saprophyte resembling Trichophyton rubrum.

A new species Trichophyton fischeri was isolated as a contaminant on blood agar plates. This fungus is believed to be a saprophyte. It may be confused with T. rubrum. On peptone dextrose agar plate, the growth is white and velvety to cottony. It occasionally forms furrows. The underside of the mature colony is brownish red. Clavate microaleuriospores are common. Trichophyton-type macroaleuriospores are produced occasionally on blood agar and potato dextrose agar. Erythritol does not stimulate T. fischeri to produce a red color on casamino erythritol albumen agar. Closterospore-like projections may be produced on the main filaments on peptone dextrose and potato dextrose agar.

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PubMed1975

Origin and ultrastructure of intra-hyphal hyphae in Trichophyton terrestre and T. rubrum.

A cell observation chamber was designed to perform continuous photomicroscopic observations of hyphal anastomosis and the origin of intra-hyphal hyphae in Trichophyton terrestre and T. rubrum. These data were correlated with ultrastructural features of intra-hyphal hyphae. Hyphal fusions occurred commonly in either species of Trichophyton when incubated alone. In T. terrestre, empty phyphal segments adjoined by live units were invaded at the septa from both directions by new hyphal ingrowth. Continuous observations revealed that the intra-hyphal hyphae subsequently anastomosed via a lateral fusion peg. Similar intra-hyphal hyphae were shown in T. rubrum. Electron microscopic studies revealed ascomycetous septa in both conventional hyphae and intra-hyphal hyphae. For the latter, the cytoplasm and wall of the inner hypha were bounded by cytoplasmic organelles and another cell wall of the outer hypha.

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