Keratinophilic fungi are present in the environment with variable distribution patterns that depend on different factors, one of which, of fundamental importance, is human and or animal presence. The present study was conducted in the environment and classrooms of schools in order to evaluate the relationship between the human presence and the presence of keratinophilic fungi. In order to achieve this goal, a new isolation technique was used. From 20 samples, 253 colonies of keratinophilic fungi were isolated. The results showed that species of the genus Chrysosporium were present in 100% of the samples, while Microsporum and Trichophyton species were present in 40% and 65% of the samples respectively. The percentage of three pathogenic species, M. canis (25), T. mentagrophytes (10) and M. gypseum (10) was significant. The other species isolated were: T. terrestre (55%), Trichophyton sp. (35%), M. cookei (25%) and T. ajelloi (10%). A correlation between the amount of gathered dust and the number of colonies of keratinophilic fungi isolated was not found.
R6sum6
Les myc&es k6ratinophyliques sont pr6sents dans le milieu avec une distribution variable et d6pendante de plusieurs facteurs, parmi lesquels d'importance fondamentale est la pr6sence humaine ou animale. Cette recherche a 6t6 conduite dans des milieux et des salles de classe pour mieux saisir les rapports existant entre pr6sence fongique et pr6sence humaine. Ace propos on a employ6 une nouvelle technique d'isolement. Dans les 20 6chantillons analys6s on a isol6 253 colonies de myc~tes k~ratinophyliques. Les resultats montrent que le genre Chrysosporium se trouve clans le 100% des bchantillons examines tandis que les genres Microsporum et Trichophyton sont r~pandus respectivement dans le 40 et le 65%. Les valeurs en pour-cent de trois espbces pathog~nes, M. canis (25), T. mentagrophytes (10) et M. gypseum (10), se sont r6v61~es statistiquement significatives. Les esp~ces suivantes ont 6t6 isol6s: T. terrestre (55%), Trichophyton sp. (35%), M. cookei (25%), T. ajelloi (10%). On n'a relev6 aucune corr6lation entre quantit6 de poussi~re ramassbe et nombre de colonies de myc~tes k6ratinophyliques isol6s.