التفاصيل البيبلوغرافية
| العنوان: |
Diversity and frequency of Nocardia spp. in the soil of Isfahan province, Iran. |
| المؤلفون: |
Kachuei, R, Emami, M, Mirnejad, R, Khoobdel, M |
| المصدر: |
Asian Pacific Journal of Tropical Biomedicine; Jun2012, Vol. 2 Issue 6, p474-478, 5p |
| مصطلحات موضوعية: |
NOCARDIA, BACTERIAL diversity, SOIL microbiology, KANAMYCIN, BACTERIA morphology |
| مصطلحات جغرافية: |
ISFAHAN (Iran), IRAN |
| مستخلص: |
Abstract: Objective: To isolate and identify Nocardia spp. from soil in different regions of Isfahan province in the center of Iran. Methods: This study was conducted in 32 districts (16 cities and 16 villages) in Isfahan province during two years. A total of 800 soil samples from these regions were studied by using kanamycin. The isolated Nocardia species were examined by gram and acid-fast staining and were identified biochemically and morphologically. The frequency and distribution of Nocardia spp. were determined in relation to different factors such as soil pH and temperate climate. Results: From 153 (19.1%) Nocardia isolates identified, Nocardia asteroids (N. asteroids) complex (45.5%) and Nocardia brasiliensis (N. brasiliensis) (24.7%) were the most frequently isolated species, followed by Nocardia otitidiscaviarum (2.2%), Nocardiopsis dassonvillei, Actinomadura actinomadura (each 1.7%) and Nocardia transvalensis (1.1%) and also unknown spp. (23.0%). In this study, most species (54.4%) of Nocardia, especially N. asteroides complex were isolated from soils with pH: 7.01–8, whereas in pH: 8.01–9 more N. brasiliensis was isolated. The most Nocardia spp. was detected from regions with semi-nomadic and temperate climate (41.1%). Conclusions: N. asteroids complex is more prevalent in Isfahan province and soil can be a potential source of nocardiosis infections. It is to be considering that climate and soil pH are involved in the frequency and diversity of aerobic Actinomycetes. [Copyright &y& Elsevier] |
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