Laboratory of parasitology and mycology, faculty of medicine, Jabbari-Jebel Lakhdar, 1007 Tunis, Tunisia.
J Mycol Med. 2012 Sep;22(3):225-9. doi: 10.1016/j.mycmed.2012.05.003. Epub 2012 Jul 19.
Epidemiological investigation of keratinophilic fungi in soil has been carried out in different parts of the world. However, our knowledge of the present occurrence and distribution of keratinophilic fungi in Tunisian soils remains unknown. This study was carried out to evaluate the epidemiological characteristics of keratinophilic fungi in the soils collected in Djerba (South of Tunisia).
One hundred and forty one soil samples were collected from various sites in Djerba and screened for the presence of keratinophilic fungi and related dermatophytes using hair-baiting technique. Fungi were identified using macro- and micro-morphological features.
Among them, 29 (20.6%) soil samples were positive. Seven species were isolated in the following order of dominance: Chrysosporium keratinophilum (48.3%), Microsporum gypseum (41.4%), C. tropicum (10.4%), C. parvum (3.45%), C. anamorph of Anixiopsis stercoraris (3.45%), C. anamorph of Arthroderma cuniculi (3.45%) and Chaetomium sp. (3.45%). The association of M. gypseum and C. keratinophilum was detected in 13.8% of positive soils. Sixty-nine percent of fungi were found in organic matter rich soil. Our results revealed a higher prevalence of keratinophilic fungi in the regions far from the sea (33.3%) than in those near the sea (11.1%) with a statistically significant difference (P=0.001). All keratinophilic fungi were isolated from soils with pH ranging from 6.2 to 7.6.
Our study showed that keratinophilic fungi were present in the various soils of Djerba. They may represent a risk to human health.
在世界不同地区已经开展了关于土壤嗜角蛋白真菌的流行病学调查。然而，我们对于突尼斯土壤中嗜角蛋白真菌的现有存在和分布情况仍然知之甚少。本研究旨在评估杰尔巴（突尼斯南部）采集的土壤中嗜角蛋白真菌的流行病学特征。
从杰尔巴的不同地点采集了 141 个土壤样本，并使用毛发诱饵技术筛选存在的嗜角蛋白真菌和相关皮肤癣菌。使用宏观和微观形态特征对真菌进行鉴定。
其中，29（20.6%）个土壤样本为阳性。按优势顺序分离出以下 7 种真菌：嗜角蛋白枝孢霉（48.3%）、石膏小孢子菌（41.4%）、热带枝孢霉（10.4%）、小孢枝孢霉（3.45%）、粪生节菱孢的无性型（3.45%）、兔毛癣菌的无性型（3.45%）和暗梗球腔菌（3.45%）。在 13.8%的阳性土壤中检测到石膏小孢子菌和嗜角蛋白枝孢霉的共生。69%的真菌存在于富含有机物的土壤中。我们的结果显示，远离海洋的地区（33.3%）嗜角蛋白真菌的流行率高于靠近海洋的地区（11.1%），差异具有统计学意义（P=0.001）。所有嗜角蛋白真菌均从 pH 值在 6.2 到 7.6 之间的土壤中分离出来。
我们的研究表明，嗜角蛋白真菌存在于杰尔巴的各种土壤中。它们可能对人类健康构成威胁。
