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Keratinophilic fungi and other moulds associated with air-dust particles from Egypt

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Abstract

One-hundred and eleven species and three species varieties belonging to 39 genera were collected from 50 dust samples on the five media used at 28°C. Using the hair-baiting technique with horse hair, 10 species ofChrysosporium were isolated:C. asperatum, C. state ofArthroderma tuberculatum, C. indicum, C. inops, C. keratinophilum, C. merdarium, C. pannorum, C. queenslandicum, C. tropicum andC. xerophilum. True dermatophytes were isolated:Trichophyton verrucosum andTrichophyton sp. Also, numerous fungi tolerating high levels of cycloheximide were encountered, such as members ofAcremonium, Aspergillus andPenicillium.

On plates of glucose or cellulose Czapek-Dox agar (free from sucrose) the most frequent fungi were:Alternaria alternata, Aspergillus flavus, A. flavus var.columnaris, A. fumigatus, A. niger, A. ochraceus, A. sydowii, A. terreus, Chaetomium globosum, Cladosporium herbarum, Emericella nidulans, Fusarium oxysporum, Mucor hiemalis, Penicillium chrysogenum, P. oxalicum, Scopulariopsis brevicaulis andUlocladium atrum.

On plates of 50% sucrose or 10 and 20% NaCl-Czapek's agar, some interesting species were frequently encountered:Eurotium amstelodami, E. chevalieri, E. halophilicum, E. montevidensis, E. repens, E. rubrum andScopulariopsis halophilica. The isolated, fungi have been tested for osmophilicity and halophilicity, they showed different rates of growth on sucrose and sodium chloride-Czapek's medium of various osmotic potential.

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Authors and Affiliations

  1. Botany Department, Faculty of Science, Assiut University, Assiut, Egypt

    S. I. I. Abdel-Hafez & A. H. Moubasher

  2. Centre of Medical and Biological Studies, Faculty of Medicine, Assiut University, Assiut, Egypt

    A. Barakat

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  1. S. I. I. Abdel-Hafez
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  2. A. H. Moubasher
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  3. A. Barakat
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Abdel-Hafez, S.I.I., Moubasher, A.H. & Barakat, A. Keratinophilic fungi and other moulds associated with air-dust particles from Egypt. Folia Microbiol 35, 311–325 (1990). https://doi.org/10.1007/BF02821283

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