Rezazadeh E, Moazeni M, Sabokbar A
Department of Microbiology, Karaj Branch, Islamic Azad University, Karaj, Iran.
Invasive Fungi Research Center, School of Medicine, Mazandaran University of Medical Sciences, Sari, Iran.
Curr Med Mycol. 2016 Sep;2(3):1-4. doi: 10.18869/acadpub.cmm.2.3.1.
Candidiasis is a widespread fungal infection caused by different species. Rapid identification of species in clinical laboratory is becoming increasingly important since the identification and discrimination of ethological agents for early treatment. We aimed at molecular identification of commonly species isolated from clinical samples by using both PCR-RFLP assay and amplification of hwp1 gene.
Clinical samples comprising of vaginal specimens ,cutaneous, sputum, bronchoalveolar lavage(BAL,( and blood cultures were recovered from suspected patients. isolates were initially identified phenotypically and confirmed by molecular approaches based on restriction fragment length polymorphism (PCR-RFLP (with restriction enzyme. Amplification of hwp1 gene was performed for discrimination of from and .
The most abundant species were (n=67; 44.6 %), (n=10; 20 %), (n=20; 13.3 %), (n=12; 8 %), (n=11; 7.3 %). Out of 67 species, 6 species identified as and 4 species identified as .
High frequency of non- species and differences in levels of susceptibility to the antifungal agents are important issues in medicine .Therefore, to manage the -related infections properly, molecular diagnostic methods would be fast, reliable and even cost-effective approaches for identification of species.
念珠菌病是由不同物种引起的一种广泛传播的真菌感染。由于对病原体进行鉴定和区分以进行早期治疗,在临床实验室中快速鉴定物种变得越来越重要。我们旨在通过PCR-RFLP分析和hwp1基因扩增对从临床样本中分离出的常见物种进行分子鉴定。
从疑似患者中采集包括阴道标本、皮肤标本、痰液、支气管肺泡灌洗(BAL)液和血培养物在内的临床样本。分离株最初通过表型鉴定,并基于限制性片段长度多态性(PCR-RFLP)用限制性内切酶进行分子方法确认。对hwp1基因进行扩增以区分白色念珠菌与其他念珠菌。
最常见的物种是白色念珠菌(n = 67;44.6%)、热带念珠菌(n = 10;20%)、光滑念珠菌(n = 20;13.3%)、近平滑念珠菌(n = 12;8%)、季也蒙念珠菌(n = 11;7.3%)。在67株白色念珠菌中,6株鉴定为克柔念珠菌,4株鉴定为光滑念珠菌。
非白色念珠菌的高频率以及对抗真菌药物敏感性水平的差异是医学上的重要问题。因此,为了妥善管理念珠菌相关感染,分子诊断方法将是快速、可靠且甚至具有成本效益的念珠菌物种鉴定方法。