Journals / Bakırköy Tıp Dergisi / 2021 / Cilt: 17 - Sayı: 2

Investigation of Antifungal Susceptibility of TrichosporonAsahii Isolated From Urine Samples

İdrar Örneklerinden İzole Edilen Trichosporon Asahii İzolatlarının Antifungal Duyarlılığının Araştırılması

Pages
130–134
Publication Date
2022-10-11
DOI
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AI Summary & Key Takeaways

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⚡ TL;DR(Too Long; Didn't Read)

Considering the high MIC values, care should be taken to prevent breakthrough infections of Trichosporon in at-risk patientsundergoing empirical or prophylactic echinocandin or fluconazole therapies.

📌 3 Key Takeaways

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Objective & Hypothesis:Objective: As part of the normal human flora of the skin and gastrointestinal tract, Trichosporon species may lead to opportunistic infectionsthrough underlying facilitating factors.
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Key Findings & Data:Antifungal susceptibility testswere conducted using the broth microdilution method, in accordance with the recommendations of the “Clinical and Laboratory StandardsInstitute (CLSI)”.Results: At a 48-hour assessment of the 100 T.asahii isolates included in the study, the minimal inhibitory concentration (MIC)50 and MIC90 valueswere (2µg/mL, 8µg/mL) for fluconazole, (0.06µg/mL, 0.12µg/mL) for voriconazole, (0.25 µg/mL, 1 µg/mL) for posaconazole, (0.12 µg/mL, 0.25µg/mL) for itraconazole and isavuconazole, (2 µg/mL) for amphotericin B and (>8) for micafungin.
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Conclusion & Impact:Considering the high MIC values, care should be taken to prevent breakthrough infections of Trichosporon in at-risk patientsundergoing empirical or prophylactic echinocandin or fluconazole therapies.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

Objective: As part of the normal human flora of the skin and gastrointestinal tract, Trichosporon species may lead to opportunistic infectionsthrough underlying facilitating factors. Urinary tract infections (UTIs) are the most common infections occurring in intensive care units (ICUs),where catheterization procedures are performed extensively. The aim of the study investigates the antifungal susceptibility of T. asahii strainsisolated from urine samples. Methods: Isolates were identified to the species level using the MALDI-TOF MS system (VITEK MS; bio-Mérieux). Antifungal susceptibility testswere conducted using the broth microdilution method, in accordance with the recommendations of the “Clinical and Laboratory StandardsInstitute (CLSI)”.Results: At a 48-hour assessment of the 100 T.asahii isolates included in the study, the minimal inhibitory concentration (MIC)50 and MIC90 valueswere (2µg/mL, 8µg/mL) for fluconazole, (0.06µg/mL, 0.12µg/mL) for voriconazole, (0.25 µg/mL, 1 µg/mL) for posaconazole, (0.12 µg/mL, 0.25µg/mL) for itraconazole and isavuconazole, (2 µg/mL) for amphotericin B and (>8) for micafungin. Conclusion: The lowest and highest MIC values among the triazole antifungal agents were determined for voriconazole and fluconazole,respectively. Considering the high MIC values, care should be taken to prevent breakthrough infections of Trichosporon in at-risk patientsundergoing empirical or prophylactic echinocandin or fluconazole therapies.

Özet

Amaç: İnsanda deri ve gastrointestinal sistemin normal florasında bulunan Trichosporon türleri, altta yatan kolaylaştırıcı faktörlerin etkisi ilefırsatçı enfeksiyonlara neden olabilmektedir. Üriner sistem enfeksiyonları (ÜSE), yoğun kateterizasyon işlemlerinin uygulandığı yoğun bakımünitesinde (YBÜ) en sık karşılaşılan enfeksiyonlardır.Trichosporon, ÜSE’de Candida’ dan sonra en sık izole edilen maya cinsidir. Bu çalışmada idrarörneklerinden izole edilen T. asahii izolatlarının antifungal duyarlılıklarının araştırılması amaçlanmıştır. Gereç ve Yöntem: İzolatların tür tanımı MALDI-TOF MS (VITEK MS; bio-Mérieux) sistemi ile yapıldı. Antifungal duyarlılık testleri “Clinical andLaboratory Standards Institute (CLSI)” önerileri doğrultusunda sıvı mikrodilüsyon yöntemi ile yapılmıştır. Bulgular: Çalışmaya dahil edilen 100 T.asahii izolatının 48. saatte yapılan değerlendirmesinde izolatların minimum inhibitör konsant (MİK)50,MİK90 değerleri; flukonazol için (2µg/mL, 8µg/mL), vorikonazol için (0.06µg/mL, 0.12µg/mL), posakonazol için (0.25 µg/mL, 1 µg/mL), itrakonazolve isavukonazol için (0.12 µg/mL, 0.25 µg/mL), amfoterisin B için (2 µg/mL) ve mikafungin için (>8) olarak belirlenmiştir. Sonuç: Triazol grubu antifungal ilaçlar içinde en düşük MİK değerleri vorikonazol’de, en yüksek MİK değerleri flukonazolde saptanmıştır. YüksekMİK değerleri göz önünde bulundurulduğunda; ekinokandin ve flukonazolün ampirik veya profilaktik olarak kullanıldığı, risk faktörleri bulunanhastalarda tedavi altında gelişebilecek Trichosporon enfeksiyonlarına karşı dikkatli olunmalıdır.

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Cite This Article

BARIŞ, A., AKSARAY, S., DİNÇER, Ş. D., ÖZAKKAŞ, F., TURAN, D. (2022). Investigation of Antifungal Susceptibility of TrichosporonAsahii Isolated From Urine Samples. Bakırköy Tıp Dergisi, Cilt: 17 - Sayı: 2, 130–134. https://ajindex.com/articles/459961

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