isolation of keratinophilic fungi and aerobic actinomycetes from park soils in gorgan, north of iran

conclusions this study showed that the collected soil from studied areas was rich of keratinophilic fungi and actinomycetes, therefore hygiene protocol should be taken to prevent the spread of pathogenic and saprophytes fungi in the environment of susceptible person. background keratinophilic fungi are a group of fungi that colonize in various keratinous substrates and degrade them to the components with low molecular weight. this study was conducted to determine the prevalence of keratinophilic fungi and aerobic actinomycetes in soil of city parks in gorgan. objectives in this study, we surveyed the city park soils of gorgan (a northern province of iran) to determine the identities and diversity of soil aerobic actinomycetes, keratinophilic and non-keratinophilic fungi. materials and methods a total of 244 soil samples were collected from 22 different parks of gorgan, north of iran. the samples were collected from the superficial layer with depth not exceeding than 0-10 cm in sterile polyethylene bags. we used hair bait technique for isolation keratinophilic fungi. the colonies identified by macroscopic and microscopic characterization after slide culturing. actinomycetes were isolated by antibiotic dilution methods and detected by using physiological tests such as lysozyme, casein, xanthine, hypoxanthine, gelatin, urea broth, and modified acid-fast stain. results totally, 75 isolates of aerobic actinomycetes were detected that actinomadura madurae and nocardia asteroides were the most prevalent strains, with 14.66 and 28% prevalence respectively. microsporum gypseum was more frequent than other keratinophilic fungi (22.96%) and aspergillus spp. was the most species of saprophyte fungi (15.92%).