STUDIES ON KERATINOPHILIC FUNGI OF SCHOOLS IN SOHAG REGION

Abstract

1- One hundred and sixty-three species and 9 varieties belonging to 54 genera were collected in the present investigation.

Part I

2- One hundred and fifty-four species and 9 varieties appertaining to 53 genera were collected from 40 floor dust samples on various types of media at 28 ± 2°C. 3- Glucose-Czapek's agar medium gave the highest numbers of fungi (327.26 colonies/g dry dust in all samples) and Sabouraud 's dextrose agar (26.22 colonies). 4- Ninety-two species and 6 varieties belonging to 28 genera were collected from floor dust samples on glucose­ Czapek's at 28 ± 2°C with the most common genera were: Aspergillus (26 species + 4 varieties), Mucor (3), Cochlio­ bolus (5), Emericella (1 + 2) and Penicillium (10). Of these genera the most common species were Aspergillus aureolatus, A. awamori, A. ficuum, A. jlavus, A. jlavus, var. columnaris A. niger, A. terreus, Mucor racemosus, Cochliobolus australiensis, Emericella nidulans, Penicillium duclauxi and P. nigricans. 5- One hundred and four species and 7 varieties representing 41 genera were collected from dust samples on Sabouraud's 0 dextrose agar at 28 ± 2 C. Dermatophytes and closely related fungi were represented by 11 species and 1 variety and these were: Ajellomyces dermatitidis (=Chrysosporium dermatitidis), Aphanoascus fulvescens (=C. keratinophilum), Apinisia queenslandica ( =C. queenslandicum), Arthroderma cuniculi (=C. anamorph of Arthroderma cuniculi), Basidia­ bolus ranarum (=B. haptosporus), Coccidioides immitis,