Journals / Mikrobiyoloji Bülteni / 2003 / Cilt: 37 - Sayı: 4

Comparison of different methods for the identification of Candida species isolated from clinical specimens

Klinik örneklerden izole edilen Candida türlerinin tanımlanmasında farklı yöntemlerin karşılaştırılması

Pages
269–276
DOI
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AI Summary & Key Takeaways

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

The sensitivities and specificities of germ tube examination, RT-80, CHROMagar Candida and Albicans İD methods vvere found as follows, respectively; 84.4% and 100%, 93.1% and 100%, 97.7% and 100%, 99.4% and 95.3 percent. in conclusion, CHROMagar Candida medium seems the most favorable rapid and practical method vvith high sensitivity and specificity for the identification of Candida species, but its cost-effectiveness should be kept in view.

📌 3 Key Takeaways

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Objective & Hypothesis:The aim of this study was to compare the different methods for the Identification of Candida strains isolated from clinical specimens.
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Key Findings & Data:The methods of germ tube examination, chlamydospore examination formed on the rice Tween-80 (RT-80) ağar and evaluation of colony morphologies on the two chromogenic agars (CHROMagar Candida, Albicans İD), were compared with a reference API 20C AUX (bioMerieux, France) automated system based on the carbohydrate assimilation, for the identification of a total 255 Candida isolates.
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Conclusion & Impact:The sensitivities and specificities of germ tube examination, RT-80, CHROMagar Candida and Albicans İD methods vvere found as follows, respectively; 84.4% and 100%, 93.1% and 100%, 97.7% and 100%, 99.4% and 95.3 percent. in conclusion, CHROMagar Candida medium seems the most favorable rapid and practical method vvith high sensitivity and specificity for the identification of Candida species, but its cost-effectiveness should be kept in view.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Duyarlılık ve özgüllük · Klinik laboratuvar teknikleri · Mikolojik tiplendirme teknikleri

Abstract

The aim of this study was to compare the different methods for the Identification of Candida strains isolated from clinical specimens. The methods of germ tube examination, chlamydospore examination formed on the rice Tween-80 (RT-80) ağar and evaluation of colony morphologies on the two chromogenic agars (CHROMagar Candida, Albicans İD), were compared with a reference API 20C AUX (bioMerieux, France) automated system based on the carbohydrate assimilation, for the identification of a total 255 Candida isolates. Of them, 173 (67.8%) were identified as C.albicans, 37 (14.5%) were C.glabrata, 23 (9%) vvere C.krusei, 9 (3.5%) were C.tropicalis, 9 (3.5%) were C.kefyr, 2 (0.8%) were C.guillermondii and 2 (0.8%) were C.parapsilosis, by API 20C AUX system. in the view of these results, 146 (84.4%) of C.albicans strains vvere identified by germ tube examination, 161 (93.1%) of C.albicans strains and 208 (81.5%) of total strains were identified by chlamydospore examination, 169 (97.7%) of C.albicans strains and 231 (90.6%) of total strains vvere identified by CHROMagar Candida method, and 168 (97.1%) of C.albicans strains vvere identified by Albicans İD method, correctly. in the CHROMagar Candida medium, 169 C.albicans isolates have produced bright green colored colonies, vvhereas 33 (89.2%) isolates which produced dark pink/purple colored colonies vvere identified as C.glabrata, l (77.8%) isolates vvhich produced metalical blue colored colonies were identified as C.tropicalis and 22 (95.6%) isolates vvhich produced pale pink colored colonies were identified as C.krusei. in the Albicans İD medium, four of the 172 isolates which were evaluated as C.albicans initially by producing blue colored colonies, have been identified as C.tropicalis by API 20C AUX system. The sensitivities and specificities of germ tube examination, RT-80, CHROMagar Candida and Albicans İD methods vvere found as follows, respectively; 84.4% and 100%, 93.1% and 100%, 97.7% and 100%, 99.4% and 95.3 percent. in conclusion, CHROMagar Candida medium seems the most favorable rapid and practical method vvith high sensitivity and specificity for the identification of Candida species, but its cost-effectiveness should be kept in view.

Özet

Bu çalışmada, çeşitli klinik örneklerden izole edilen Candida suşlarının tanımlanmasında, karbonhidrat asimilasyon esasına dayanan API20C AUX (bioMerieux, France) otomatize sistemi referans alınarak, germ tüp incelemesi, pirinç unu Tween-80 (PT-80) ağarda klamidospor incelemesi ve 2 farklı kromojenik ağarda koloni morfolojilerinin değerlendirilmesi (CHROMagar Candida ve Albicans İD) yöntemlerinin karşılaştırılması amaçlanmıştır. API 20C AUX sistemiyle, çalışmaya alınan 255 Candida izolatının 173'ü (%67.8) C.albicans, 37'si (%14.5) C.glabrata, 23'ü (%9) C.krusei, 9'u (%3.5) C.tropicalis, 9'u (%3.5) C.kefyr, 2'si (%0.8) C.guillermondii ve 2'si (%0.8) C.parapsilosis olarak tanımlanmıştır. Bu sonuçlar dikkate alındığında, germ tüp incelemesiyle C.albicans suşlarının 146'sı (%84.4), klamidospor incelemesiyle C.albicans suşlarının 161'i (%93.1) ve toplam suşların 208'i (%81.5), CHROMagar Candida yöntemiyle C.albicans suşlarının 169'u (%97.7) ve toplam suşların 231 'i (%90.6), Albicans İD yöntemiyle ise C.albicans suşlarının 168'i (%97.1) doğru olarak tanımlanabilmiştir. CHROMagar Candida besiyerinde, 169 C.albicans izolatı parlak yeşil renkli koloni oluşturmuş, 33 (%89.2) izolat koyu pembe-mor renk oluşturarak C.glabrata, 7 (%77.8) izolat metalik mavi renk oluşturarak C.tropicalis ve 22 (%95.6) izolat soluk pembe renk oluşturarak C.krusei şeklinde doğru olarak saptanabilmiştir. Albicans İD besiyerinde, mavi renkte koloni oluşturan 172 izolat C.albicans olarak değerlendirilmiş, bunların 4'ünün API 20C AUX ile C.tropicalis olduğu belirlenmiştir. C.albicans''in tanımlanmasında, germ tüp incelemesi, PT-80, CHROMagar Candida ve Albicans İD besiyerlerinin duyarlılık ve özgüllükleri sırasıyla; %84.4 ve %100, %93.1 ve %100, %97.7 ve %100, %99.4 ve %95.3 olarak saptanmıştır. Sonuç olarak, Candida türlerinin tanımlanmasında CHROMagar Candida besiyerinin, duyarlı, özgül, hızlı ve pratik bir yöntem olduğu, ancak yüksek maliyetinin gözönünde bulundurulması gerektiği kanısına varılmıştır.

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Cite This Article

ÇETİNKAYA, Z., ALTINDİŞ, M., AKTEPE, O. C., KARABIÇAK, N. (2003). Comparison of different methods for the identification of Candida species isolated from clinical specimens. Mikrobiyoloji Bülteni, Cilt: 37 - Sayı: 4, 269–276. https://ajindex.com/articles/299437

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