Journals / Mikrobiyoloji Bülteni / 2013 / Cilt: 47 - Sayı: 2

Isolation of scedosporium apiospermum (teleomorph: Pseudallescheria apiosperma) from an acute myeloid leukemia patient

Bir akut miyeloid lösemi hastasından scedosporium apiospermum (teleomorf: Pseudallescheria apiosperma) izolasyonu

Pages
351–355
DOI
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AI Summary & Key Takeaways

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

It was concluded that antifungal susceptibility tests should be performed for Scedosporium species and the results should be compared to the clinical response.

📌 3 Key Takeaways

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Objective & Hypothesis:Scedosporium apiospermum is an emerging opportunistic pathogen that may lead to life-threatening infections especially in immunosuppressive individuals.
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Key Findings & Data:In this report, S.apiospermum infection in a 62 year old male patient with acute myeloid leukemia was presented.
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Conclusion & Impact:It was concluded that antifungal susceptibility tests should be performed for Scedosporium species and the results should be compared to the clinical response.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

Scedosporium apiospermum is an emerging opportunistic pathogen that may lead to life-threatening infections especially in immunosuppressive individuals. In this report, S.apiospermum infection in a 62 year old male patient with acute myeloid leukemia was presented. During remission-induction chemotherapy, piperacillin-tazobactam therapy was started for febrile neutropenia. Since fever had continued, treatment was switched to imipenem and also amphotericin B deoxycholate was added to the treatment protocol. Because of allergic reaction to amphotericin B, caspofungin was started at the fifth day of neutropenic fever. Following imaging studies with high resolution computerized thorasic tomography, antifungal therapy was changed to voriconazole due to findings suggestive of invasive aspergillosis. Since galactomannan antigen was found negative at the first day of voriconazole therapy, bronchoalveolar lavage material from apical segment of the left lower lobe was cultured onto various microbiologic media. S.apiospermum (Teleomorph: Pseudallescheria apiosperma) was isolated on the fourth day of cultivation. According to CLSI M38-A2 microdilution procedure, minimum inhibitory concentrations (MIC) of voriconazole, caspofungin, amphotericin B and posaconazole were found as 0.06, 2, 8 and 4 μg/ml, respectively. Since neutropenia was resolved, the patient was discharged with continued voriconazole therapy. It was concluded that antifungal susceptibility tests should be performed for Scedosporium species and the results should be compared to the clinical response. The determination of MIC breakpoints may provide useful information for the recommendation and use of optimal choices for the treatment of Scedosporium infections.

Özet

Scedosporium apiospermum özellikle immün sistemi baskılanmış kişilerde hayatı tehdit eden enfeksiyonlar oluşturabilen fırsatçı bir patojendir. Bu raporda, 62 yaşındaki erkek, akut miyeloid lösemi hastasında gelişen S.apiospermum enfeksiyonu sunulmaktadır. Remisyon-indüksiyon kemoterapisi sırasında nötropenik ateş gelişen hastaya piperasilin-tazobaktam tedavisi başlanmıştır. Ateş yüksekliğinin devam etmesi nedeniyle imipenem tedavisine geçilmiş ve ampirik amfoterisin B deoksikolat tedaviye eklenmiştir. Amfoterisin B alerjisi nedeniyle, ateşin beşinci gününde kaspofungin tedavisi başlanmıştır. Yüksek çözünürlüklü toraks tomografisi değerlendirmesi sonucunda, invazif aspergilloz düşüncesiyle antifungal tedavi vorikonazol olarak değiştirilmiştir. Vorikonazol tedavisinin başladığı gün galaktomannan testinin negatif bulunması üzerine, akciğer sol alt lob apikal segmentten fiberoptik bronkoskop ile alınan örnekler çeşitli mikrobiyolojik kültür besiyerlerine ekilmiştir. Kültürün dördüncü gününde S.apiospermum (Eşeyli form: Pseudallescheria apiosperma) izole edilmiştir. CLSI M38-A2 mikrodilüsyon yöntemine göre vorikonazol, kaspofungin, amfoterisin B ve posakonazol minimum inhibitör konsantrasyonu (MİK) değerleri sırasıyla; 0.06, 2, 8 ve 4 μg/ml olarak saptanmıştır. Nötropenisi düzelen hasta vorikonazol tedavisiyle taburcu edilmiştir. Sonuç olarak, Scedosporium türleri için, klinik izolatlara antifungal duyarlılık testlerinin yapılarak sonuçların klinik yanıt ile karşılaştırılması ve MİK direnç sınır değerlerinin saptanması, optimal tedavi seçeneklerinin önerilebilmesi ve uygulanabilmesi için yarar sağlayabilir.

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Cite This Article

ERGİN, Ç., KUTLU, M., ARIKAN, S. A., SARIBAŞ, Z., AYDENİZ, F. O., SARI, İ., DURSUNOĞLU, N. (2013). Isolation of scedosporium apiospermum (teleomorph: Pseudallescheria apiosperma) from an acute myeloid leukemia patient. Mikrobiyoloji Bülteni, Cilt: 47 - Sayı: 2, 351–355. https://ajindex.com/articles/298588

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