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Isolation of keratinophilic fungi from floors in Roman primary schools

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Abstract

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.

Résumé

Les mycètes kératinophyliques sont présents dans le milieu avec une distribution variable et dépendante de plusieurs facteurs, parmi lesquels d'importance fondamentale est la présence humaine ou animale. Cette recherche a été conduite dans des milieux et des salles de classe pour mieux saisir les rapports existant entre présence fongique et présence humaine. A ce propos on a employé une nouvelle technique d'isolement. Dans les 20 échantillons analysés on a isolé 253 colonies de mycètes kératinophyliques. Les resultats montrent que le genre Chrysosporium se trouve dans le 100% des échantillons examinés tandis que les genres Microsporum et Trichophyton sont répandus respectivement dans le 40 et le 65%. Les valeurs en pour-cent de trois espèces pathogènes, M. canis (25), T. mentagrophytes (10) et M. gypseum (10), se sont révélées statistiquement significatives. Les espèces suivantes ont été isolés: T. terrestre (55%), Trichophyton sp. (35%), M. cookei (25%), T. ajelloi (10%). On n'a relevé aucune corrélation entre quantité de poussière ramassée et nombre de colonies de mycètes kératinophyliques isolés.

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Mercantini, R., Marsella, R., Lambiase, L. et al. Isolation of keratinophilic fungi from floors in Roman primary schools. Mycopathologia 82, 115–120 (1983). https://doi.org/10.1007/BF00437341

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