Journals / Türk Mikrobiyoloji Cemiyeti Dergisi / 2019 / Cilt: 49 - Sayı: 2

Identification of Candida parapsilosis Complex Strains Isolated from Blood Samples at Species Level and Determination of Their Antifungal Susceptibilities

Kan Örneklerinden İzole Edilen Candida parapsilosis Kompleks Suşlarının Tür Düzeyinde Tanımlanması ve Antifungal Duyarlılıklarının Belirlenmesi

Pages
61–66
Publication Date
2022-11-05
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

It is concluded that additional studies should be done to search for clonal relationship between strains and genetic basis of resistance.

📌 3 Key Takeaways

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Objective & Hypothesis:Objective: Candida parapsilosis species complex is the second most common cause of candidiasis which is an opportunistic infection, in many centers in the world and in our country.
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Key Findings & Data:Method: A total of 118 blood isolates from the stock culture of Uludağ University Faculty of Medicine Department of Microbiology were used.
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Conclusion & Impact:It is concluded that additional studies should be done to search for clonal relationship between strains and genetic basis of resistance.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

Objective: Candida parapsilosis species complex is the second most common cause of candidiasis which is an opportunistic infection, in many centers in the world and in our country. Candida parapsilosis sensu stricto, Candida orthopsilosis and Candida metapsilosis within this species complex are indistinguishable from each other phenotypically and various molecular methods are needed for their identification. In this study, we aimed to investigate the antifungal susceptibility of C. parapsilosis species complex isolated from blood cultures in our laboratory and to identify them at species level. Method: A total of 118 blood isolates from the stock culture of Uludağ University Faculty of Medicine Department of Microbiology were used. The in vitro sensitivity of the isolates to fluconazole, voriconazole, itraconazole, posaconazole, amphotericin B and anidulafungin was determined according to the CLSI-M27 document. The species in the C. parapsilosis species complex were determined by the investigation of the gene region encoding the secondary alcohol dehydrogenase enzyme (SADH) using “polymerase chain reaction-restriction fragment length polymorphism” (PCR-RFLP) method. Results: In this study, fluconazole resistance was found to be 26.3% in the 118 C. parapsilosis species complex isolated from blood cultures, and the resistance to amphotericin B and anidulafungin was almost none. There were no C. orthopsilosis and C. metapsilosis species among these strains. Conclusion: In this study, it was shown that high fluconazole resistance in C. parapsilosis species complex in our center was not associated with different species in the complex. It is concluded that additional studies should be done to search for clonal relationship between strains and genetic basis of resistance.

Özet

Amaç: Dünyada ve ülkemizde birçok merkezde, fırsatçı bir enfeksiyon olan kandidemilere ikincisıklıkta neden olan tür Candida parapsilosis tür kompleksidir. Bu tür kompleksi içinde yer alanCandida parapsilosis sensu stricto, Candida orthopsilosis ve Candida metapsilosis türleri fenotipikolarak birbirinden ayrılamaz ve tanımlanmaları için çeşitli moleküler yöntemlere gereksinimduyulur. Bu çalışmada, laboratuvarımızda kan kültürlerinden izole edilen C. parapsilosis türkompleksi suşlarının antifungal duyarlılıklarının incelenmesi ve tür düzeyinde tanımlamayapılması amaçlanmıştır.Yöntem: Uludağ Üniversitesi Tıp Fakültesi Tıbbi Mikrobiyoloji Anabilim Dalı stoklarından 118 kanizolatı kullanıldı. İzolatların flukonazol, vorikonazol, itrakonazol, posakonazol, amfoterisin B veanidulafungine in vitro duyarlılığı CLSI-M27 dokümanına göre saptandı. C. parapsilosis türkompleksindeki türler, sekonder alkol dehidrogenaz enzimini kodlayan gen bölgesinin (SADH)“polimeraz chain reaction-restriction fragment length polymorphism” (PCR-RFLP) yöntemiyleincelenmesiyle belirlendi.Bulgular: Bu çalışmada, kan kültürlerinden izole edilen 118 C. parapsilosis tür kompleksi suşundaflukonazol direncinin %26.3 oranında olduğu, amfoterisin B ve anidulafunginde ise direncin yokdenecek kadar az olduğu saptandı. Antifungal duyarlılığı belirlenen bu suşlar arasındaC. orthopsilosis ve C. metapsilosis türlerine rastlanmadı.Sonuç: Bu çalışma ile merkezimizdeki C. parapsilosis tür kompleksindeki yüksek flukonazol direncininkompleks içindeki türlerle ilişkili olmadığı görüldü. Suşlar arasındaki klonal ilişkinin ve direncingenetik temellerinin araştırılması için ek çalışmaların yapılması gerektiği sonucuna varıldı.

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Cite This Article

ENER, B., AĞCA, H., CİLO, B. D. (2022). Identification of Candida parapsilosis Complex Strains Isolated from Blood Samples at Species Level and Determination of Their Antifungal Susceptibilities. Türk Mikrobiyoloji Cemiyeti Dergisi, Cilt: 49 - Sayı: 2, 61–66. https://ajindex.com/articles/635588

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