Abstract
A total of 23 soil samples of potted plants was collected from hospitals in Sari, Iran. Each sample contained approximately 200 g soil, taken from a depth of 0–10 cm of the pots. Samples were analysed by two different methods. (1) Culture on Sabouraud's dextrose agar medium containing chloramphenicol (SC); cultured fungi were identified by macroscopic and microscopic characterization. (2) The hair-baiting technique (HBT) was used to isolate the keratinophilic fungi. After culture on SC medium, 100% of plates were positive for fungal growth, and in total 1150 colonies with 13 different types of fungi were isolated. Penicillium spp. (52%), Acremonium spp. (20%), Paecilomyces spp. (11.9%), Cladsporium spp. (3.7%) and Aspergillus spp. (3.1%) were the predominant fungal species. Rhizopus spp. (0.1%) were less frequent. Keratinophilic fungi such as Microsporum gypseum, Microsporum cookei and Chrysosporium spp. were isolated using HBT. The presence of pathogenic fungi such as Cladosporium spp, Aspergillus spp, M. gypseum, and M. cookei in potted plants in hospitals represents a potential source of nosocomial infection.
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