Journals / Mikrobiyoloji Bülteni / 2004 / Cilt: 38 - Sayı: 3

Comparison of Cobas Amplicor system and microscopic examination with Bactec radiometric method for the detection of Mycobacterium tuberculosis in clinical samples

Klinik örneklerden Mycobacterium tuberculosis saptanmasında Cobas Amplicor sistemi ve mikroskopik inceleme yöntemlerinin Bactec radyometrik yöntemi ile karşılaştırılması

Pages
193–201
DOI
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AI Summary & Key Takeaways

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

In conclusion, microscopic examination and nucleic acid amplification methods should always be used together with culture methods for the laboratory diagnosis of tuberculosis.

📌 3 Key Takeaways

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Objective & Hypothesis:Tuberculosis is still a major health problem all around the world.
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Key Findings & Data:A total of 2098 clinical samples collected between July 2002 and February 2004 in Clinical Microbiology Laboratory of Hacettepe University Adult Hospital, were studied by Bactec radiometric system for diagnosis of tuberculosis and M.tuberculosis was detected in 107 (5.1%) samples.
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Conclusion & Impact:In conclusion, microscopic examination and nucleic acid amplification methods should always be used together with culture methods for the laboratory diagnosis of tuberculosis.
🔬Design:Research Article
📍Scope:2098 Verileri
⚙️Variables:Mikroskopi · Mycobacterium tuberculosis · Tüberküloz

Abstract

Tuberculosis is still a major health problem all around the world. Since the patients with tuberculosis spread the infection by means of aerosols containing tuberculosis bacilli, it is critically important to detect these patients and start the treatment as soon as possible. Therefore there is a need for highly sensitive and specific reliable diagnostic methods. In this study, Ehrlich-Ziehl-Neelsen (EZN)staining method and Cobas Amplicor system were evaluated for the diagnosis of tuberculosis in comparison with the standard reference Bactec radiometric method. A total of 2098 clinical samples collected between July 2002 and February 2004 in Clinical Microbiology Laboratory of Hacettepe University Adult Hospital, were studied by Bactec radiometric system for diagnosis of tuberculosis and M.tuberculosis was detected in 107 (5.1%) samples. The specificity, sensitivity, positive and negative predictive values of EZN staining method were found to be 98.5%, 42.9%, 62.1% and 96.9%, respectively. The specificity, sensitivity, positive and negative predictive values of Cobas Amplicor system were detected as 99.3%, 67.3%, 83.5% and 98.4%, respectively. These results were in concordance with the results of previous studies. In conclusion, microscopic examination and nucleic acid amplification methods should always be used together with culture methods for the laboratory diagnosis of tuberculosis.

Özet

Tüberküloz tüm dünya çapında çok önemli bir sağlık sorunu olmaya devam etmektedir. Tüberkülozun bulaş kaynağı özellikle basil çıkaran hastalar olduğu için toplum sağlığı açısından, hastaların başkalarına hastalığı bulaştırmadan önce saptanması ve hızla tedavisi esastır. Bu nedenle duyarlılık ve özgüllüğü yüksek, güvenilir tanı yöntemlerinin kullanılması gerekmektedir. Bu araştırmada Hacettepe Üniversitesi Erişkin Hastanesi Klinik Mikrobiyoloji Laboratuvarı'nda Temmuz 2002 ile Şubat 2004 tarihleri arasında tüberküloz tanısında Bactec radyometrik kültür sistemi referans alınarak, Ehrlich-Ziehl-Neelsen (EZN) boyama yöntemi ve Cobas Amplicor sistemi değerlendirilmiştir. Araştırma kapsamında Bactec radyometrik kültür sistemiyle toplam 2098 klinik örnek çalışılmış ve bu örneklerden 107 tanesinde (%5.1) M.tuberculosis saptanmıştır. EZN boyama yöntemi için özgüllük %98.5, duyarlılık %42.9, pozitif prediktif değer %62.1, negatif prediktif değer %96.9 bulunmuştur. Cobas Amplicor sistemi için ise özgüllük %99.3, duyarlılık %67.3, pozitif prediktif değer %83.5, negatif prediktif değer %98.4 olarak belirlenmiştir. Bu değerler, literatürde bildirilmiş olan değerlerle uyumludur. Bu çalışma sonucunda, tüberkülozun laboratuvar tanısında mikroskopik inceleme ve nükleik asit çoğaltma yöntemlerinin mutlaka kültür yöntemleriyle birlikte çalışılması ve değerlendirmelerin buna göre yapılması gerektiği sonucuna varılmıştır.

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Cite This Article

ALP, A., PINAR, A., HASÇELİK, G. (2004). Comparison of Cobas Amplicor system and microscopic examination with Bactec radiometric method for the detection of Mycobacterium tuberculosis in clinical samples. Mikrobiyoloji Bülteni, Cilt: 38 - Sayı: 3, 193–201. https://ajindex.com/articles/299862

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