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Mycoflora and mycotoxin-producing fungi of air-dust particles from Egypt

✍ Scribed by S. I. I. Abdel-Hafez; A. A. M. Shoreit; A. I. I. Abdel-Hafez; O. M. O. E.-Maghraby

Publisher: Springer Netherlands
Year: 1986
Tongue: English
Weight: 544 KB
Volume: 93
Category: Article
ISSN: 0301-486X
DOI: 10.1007/bf00437011

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✦ Synopsis

Using the dilution-plate method, 27 genera and 64 species were collected from 20 air-dust samples on glucose -(24 genera and 57 species) and cellulose -(21 genera and 45 species) Czapek's agar at 28 ~ There are basic similarities between the mycoflora of air-dust on the two media and the most prevalent species were Aspergillus niger, A. flavus, A. ochraceus, A. terreus, A. versicolor, Penicillium chrysogenum, P funiculosum, Alternaria alternata, Cladosporium herbarum, Fusarium oxysporum, Rhizopus stolonifer and Trichoderma viride. Chaetomium globosum, Stachybotrys chartarum, Humicola grisea and Arthrobotrys oligospora were common only on cellulose agar plates.

Extracts of mycelium from 25 isolates were tested with brine schrimp (Artemia salina); of these 23 displayed varying degrees of toxicity. Thin layer chromatographic analysis of 12 isolates of Aspergillus flavus revealed that 4 strains were producing detectable aflatoxin. Zearalenone production was noted for 3 out of 5 strains of Fusarium oxysporum and 2 out of 5 strains of E solani. A. niger van Tieghem A. flavus Link A. ochraceus Wilhelm A. terreus Thorn A, versicolor (Vuill.) Tirab. A. fumigatus Fresenius A. sydowi(Bain. & Sart.) Thorn & Church A. tamarii Kita A. flavipes (Bain. & Sart.) Thorn & Church A. melleus Yukawa A. parasiticus Speare A. quadrilineatus Thorn & Raper A. sulphureus (Fres.) Thorn & Church A. candidus Link A. nidulans (Eidam) Wint. A. nidulans var. latus Thorn & Raper A. terreus var. aureus Thorn & Raper A. ustus (Bain.) Thom& Church Penicillium (total count) P. eorylophilum Dierckx P. chrysogenum Thorn P. funiculosum Thorn P. nigricans (Bain.) Thorn P. duclauxi Delacroix P. martensii Biourge P. lanosum Westling P. purpurogenum Stoll Alternaria (total count) A. alternata (Fries) Keissler A. tenuissima (Kunze ex Pets.) Wiltshire Cladosporium (total count) C. herbarum (Pets.) Link ex Ft. C. eladosporioides (Fres.) de Vries C. sphaerospermum Penzig Fusarium (total count) F. oxysporum Schlecht ex Ft. F. moniliforme Sheldon F. solani (Mart.) Sacc. Rhizopus (total count) R. stolonifer Ehrend. ex. Fr. Lindt R. oryzae Went & Pri. Geerlings Dreehslera (total count) D. spicifer Nelson D. sativus (Ito & Kur.) Drec. ex Daster D. hawaiiensis (Bug.) Subram & Jain Chaetomium (total count) C. olivaceum Cooke & Ellis C. globosum Kunze ex Fries C. jodpharence Lodha C. spirate Zopf Stachybotrys (total count) S. chartarum (Ehrenb ex Link) Hughes

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