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Nargesi S, Abastabar M, Valadan R, Mayahi S, Youn JH, Hedayati MT, Seyedmousavi S. Differentiation of Aspergillus flavus from Aspergillus oryzae Targeting the cyp51A Gene. Pathogens 2021; 10:pathogens10101279. [PMID: 34684228 PMCID: PMC8541052 DOI: 10.3390/pathogens10101279] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 09/30/2021] [Accepted: 10/01/2021] [Indexed: 11/16/2022] Open
Abstract
Aspergillus flavus is one of the most important agents of invasive and non-invasive aspergillosis, especially in tropical and subtropical regions of the world, including Iran. Aspergillus oryzae is closely related to A. flavus, and it is known for its economic importance in traditional fermentation industries. Reports of infection due to A. oryzae are scarce. Several studies reported that differentiating these two species in clinical laboratories is not possible using MALDI-TOF or by targeting fungal barcode genes, such as Internal Transcribed Spacer (ITS) and β-tubulin (benA). The species-level identification of causative agents and the determination of antifungal susceptibility patterns can play significant roles in the outcome of aspergillosis. Here, we aimed to investigate the discriminatory potential of cyp51A PCR-sequencing versus that of the ITS, benA and calmodulin (CaM) genes for the differentiation of A. flavus from A. oryzae. In a prospective study investigating the molecular epidemiology of A. flavus in Iran between 2008 and 2018, out of 200 clinical isolates of A. flavus, 10 isolates showed >99% similarity to both A. flavus and A. oryzae. Overall, the ITS, β-tubulin and CaM genes did not fulfil the criteria for differentiating these 10 isolates. However, the cyp51A gene showed promising results, which warrants further studies using a larger set of isolates from more diverse epidemiological regions of the world.
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Affiliation(s)
- Sanaz Nargesi
- Department of Medical Mycology, School of Medicine, Mazandaran University of Medical Sciences, Sari 48157-33971, Iran; (S.N.); (S.M.)
- Invasive Fungi Research Center, Communicable Diseases Institute, Mazandaran University of Medical Sciences, Sari 48157-33971, Iran
| | - Mahdi Abastabar
- Department of Medical Mycology, School of Medicine, Mazandaran University of Medical Sciences, Sari 48157-33971, Iran; (S.N.); (S.M.)
- Invasive Fungi Research Center, Communicable Diseases Institute, Mazandaran University of Medical Sciences, Sari 48157-33971, Iran
- Correspondence: (M.A.); (M.T.H.); (S.S.)
| | - Reza Valadan
- Molecular and Cell Biology Research Center (MCBRC), Mazandaran University of Medical Sciences, Sari 48157-33971, Iran;
| | - Sabah Mayahi
- Department of Medical Mycology, School of Medicine, Mazandaran University of Medical Sciences, Sari 48157-33971, Iran; (S.N.); (S.M.)
| | - Jung-Ho Youn
- Clinical Center, Microbiology Service, Department of Laboratory Medicine, National Institutes of Health, Bethesda, MD 20892, USA;
| | - Mohammad Taghi Hedayati
- Department of Medical Mycology, School of Medicine, Mazandaran University of Medical Sciences, Sari 48157-33971, Iran; (S.N.); (S.M.)
- Invasive Fungi Research Center, Communicable Diseases Institute, Mazandaran University of Medical Sciences, Sari 48157-33971, Iran
- Correspondence: (M.A.); (M.T.H.); (S.S.)
| | - Seyedmojtaba Seyedmousavi
- Clinical Center, Microbiology Service, Department of Laboratory Medicine, National Institutes of Health, Bethesda, MD 20892, USA;
- Correspondence: (M.A.); (M.T.H.); (S.S.)
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