Journals / İnfeksiyon Dergisi / 2004 / Cilt: 18 - Sayı: 4

Evaluation of Ziehl-Neelsen staining and amplified Mycobacterium tuberculosis direct test (MTD) methods in comparison with BACTEC system for the diagnosis of tuberculosis in various clinical samples submitted to clinical microbiology laboratory

Klinik mikrobiyoloji laboratuvarına tüberküloz tanısı amacıyla gönderilen çeşitli örneklerde BACTEC yöntemine göre Ziehl-Neelsen boyama ve amplifiye Mycobacterium tuberculosis direkt testi (MTD) yöntemlerinin değerlendirilmesi

Pages
429–432
Publication Date
2022-11-05
DOI
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AI Summary & Key Takeaways

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

When two-year results were evaluated together, the overall sensitivity, specifity, positive and negative predictive values for EZN and MTD were found as 48.8% and 67.6%, 92.9% and 94.8%,. 27.2% and 37.1 %, 97.1 % and 98.5%, respectively.

📌 3 Key Takeaways

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Objective & Hypothesis:Mycobacterium tuberculosis infections are still a significant cause of death in all over the world.
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Key Findings & Data:Since the first step to control the infection is establishing rapid and accurate diagnosis, the need of reliable laboratory diagnostic tests with high sensitivity and specifity rates in clinical microbiology laboratory is an important issue.- In this study, the validity of Ziehl-Neelsen (EZN) and Amplified Mycobacterium tuberculosis Direct Test (MTD-Gen Probe, USA) were evaluated by comparing BACTEC radiometric culture system (Becton Dickinson, USA) in Clinical Microbiology Laboratory, Hacettepe University Hospital, in 1998-1999.
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Conclusion & Impact:When two-year results were evaluated together, the overall sensitivity, specifity, positive and negative predictive values for EZN and MTD were found as 48.8% and 67.6%, 92.9% and 94.8%,. 27.2% and 37.1 %, 97.1 % and 98.5%, respectively.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

Mycobacterium tuberculosis infections are still a significant cause of death in all over the world. Since the first step to control the infection is establishing rapid and accurate diagnosis, the need of reliable laboratory diagnostic tests with high sensitivity and specifity rates in clinical microbiology laboratory is an important issue.- In this study, the validity of Ziehl-Neelsen (EZN) and Amplified Mycobacterium tuberculosis Direct Test (MTD-Gen Probe, USA) were evaluated by comparing BACTEC radiometric culture system (Becton Dickinson, USA) in Clinical Microbiology Laboratory, Hacettepe University Hospital, in 1998-1999. Totally 2339 {1125 and 1214 in 1998 and 1999, respectively) specimens were examined by BACTEC method. In 1998, 53 (4.7%) and in 1999, 68 (5.6%) of these specimens were found positive by radiometric culture method. When two-year results were evaluated together, the overall sensitivity, specifity, positive and negative predictive values for EZN and MTD were found as 48.8% and 67.6%, 92.9% and 94.8%,. 27.2% and 37.1 %, 97.1 % and 98.5%, respectively.

Özet

Tüberküloz, günümüzde önemli bir ölüm nedeni olmaya devam etmektedir. Tüberküloz ile savaşta birinci basamak, hastalığa tanı konulmasıdır. Tüberküloz enfeksiyonlarının tanısında, diğer birçok infeksiyon hastalığı tanısında olduğu gibi, sadece klinik görünüm ile değerlendirme yapmak yetersiz kalabilmektedir. Bu nedenle duyarlılık ve özgüllüğü yüksek, güvenilir laboratuvar tanı yöntemlerinin kullanılması gerekmektedir. Bu araştırmada Hacettepe Üniversitesi Erişkin Hastanesi Klinik Mikrobiyoloji Laboratuvarı'nda 1998 ve 1999 yıllarında BACTEC radyometrik kültür sistemi (Becton Dickinson, USA) referans alınarak Ziehl-Neelsen boyaması (EZN) ve MTD (Amplified Mycobacterium tuberculosis Direct Test, Gen-Probe, USA) yöntemleri değerlendirilmiştir. Araştırma sonuçlarına göre BACTEC radyometrik kültür sistemiyle 1998 yılında 1125, 1999 yılı içinde 1214 örnek olmak üzere toplam 2339 örnek incelenmiştir. Bunlardan 1998 ve 1999 yıllarında sırasıyla 53'ü (%4.7) ve 68'i (%5.6) pozitif bulunmuştur. Her iki yıl birlikte değerlendirildiğinde, EZN için özgüllük %92.9, duyarlılık %48.8, pozitif prediktif değer %27.2, negatif prediktif değer %97.1; MTD için ise özgüllük %94.8, duyarlılık %67.6, pozitif prediktif değer %37.1, negatif prediktif değer % 98.5 bulunmuştur.

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Cite This Article

PINAR, A., ERCİS, S., HASÇELİK, G. (2022). Evaluation of Ziehl-Neelsen staining and amplified Mycobacterium tuberculosis direct test (MTD) methods in comparison with BACTEC system for the diagnosis of tuberculosis in various clinical samples submitted to clinical microbiology laboratory. İnfeksiyon Dergisi, Cilt: 18 - Sayı: 4, 429–432. https://ajindex.com/articles/651751

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