Volume 19, Number 1 (6-2017)                   yafte 2017, 19(1): 87-97 | Back to browse issues page


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Kheirkhah M, Chadeganipour M, Dehghan P, Mohammadi R. Identification of morphological and molecular Aspergillus species isolated from patients based on beta-tubulin gene sequencing. yafte. 2017; 19 (1) :87-97
URL: http://yafte.lums.ac.ir/article-1-2483-en.html

Assistant Professor Department of Medical Parasitology and Mycology, Faculty of Medicine, Infectious Diseases and Tropical Medicine Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
Abstract:   (524 Views)

Background: Aspergillus species are opportunistic pathogens among immunocompromised patients. In terms of pathogenesis and mycotoxin production, they are in great value. The aim of the this study was to evaluate of beta-tubulin gene for identification of clinical Aspergillus species by PCR-sequencing method compared to morphological features of clinical isolates (such as conidial shape in direct microscopic examination, colony shape in culture, and physiological tests).

Materials and Methods: In this study, 465 patients referred to the Shefa laboratory of Isfahan were evaluated. Morphological and molecular identification of clinical samples were performed using culture on sabouraud agar, malt extract agar, czapekdox agar, direct microscopy, and PCR-sequencing of beta tubulin gene, respectively. Sequences were analyzed in comparison with gene bank data.

Results: Thirty nine out of 465 suspected cases (8.4%) had aspergillosis. The most prevalent species were Aspergillus flavus (56.4%), A. oryzae (20.5%), and A. fumigatus (10.2%), respectively. Fifty nine percent of patients were females and 49% were males.

Conclusion: In comparison with phenotypic tests, sequencing of beta-tubulin gene for identification of Aspergillus species is at great value. Replacement of molecular techniques with conventional tests is recommended for precise identification of microorganism for better management of infection.

Full-Text [PDF 262 kb]   (104 Downloads)    
Type of Study: Research |
Received: 2017/06/18 | Accepted: 2017/06/18 | Published: 2017/06/18

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