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The Egyptian Journal of Bronchology
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Diagnostic utility of serum adenosine deaminase level in the diagnosis of pulmonary tuberculosis

Egyptian Journal of Bronchology volume 10, pages 133–139 (2016)Cite this article

Abstract

Aim of the work

This study was conducted to evaluate the role of serum adenosine deaminase (ADA) level in the diagnosis of pulmonary tuberculosis (TB) and its relationship with clinical, radiological, and laboratory parameters.

Patients and methods

This study was performed on 70 individuals: 60 patients with tuberculous and nontuberculous pulmonary diseases and 10 apparently healthy individuals as a control group. The participants were divided into four groups: group I included 30 patients with active pulmonary TB who were subdivided into group IA, which included 20 patients with sputum smear-positive pulmonary TB, and group IB, which included 10 patients with sputum smear-negative pulmonary TB (culture positive); group II included 10 patients with tuberculous pleural effusion; group III included 20 patients with nontuberculous lung diseases (five cases with pneumonia, five cases with pyogenic lung abscess, five cases with bronchiectasis, three cases with lung cancer, and two cases with mesothelioma); and group IV included 10 apparently healthy individuals as a control group. Patients were subjected to history taking, clinical examination, plain chest radiography posterior–anterior view, three consecutive sputum smears for acid-fast bacilli (AFB), sputum culture for AFB using BACTEC TB-460 system in group IB, laboratory investigations, tuberculin skin test, serum ADA level evaluation in all participants, and pleural ADA level evaluation in cases of tuberculous pleural effusion.

Results

Serum ADA showed high percentage positivity (90%) in the diagnosis of pulmonary TB, followed by tuberculin skin test (83.3%), chest radiography (73.3%), erythrocyte sedimentation rate (70%), sputum for AFB (66.6%), toxic symptoms (53.3%), and hemoptysis (36.3%). Serum ADA sensitivity and specificity at cut-off point 30.15 μ/l were 95 and 86.7%, respectively, with a positive predictive value of 90.5%, negative predictive value of 92.2%, and accuracy of 91.4%.

Conclusion

Serum ADA level shows higher percentage positivity compared with clinical, radiological, and laboratory parameters in the diagnosis of pulmonary TB.

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Authors and Affiliations

  1. Department of Chest Diseases, Faculty of Medicine, Benha University, Banha, Egypt

    Abdelsadek H. Alaarag & Osama I. Mohammad

  2. Department of Chest Diseases, Abbassia Chest Hospital, Cairo, Egypt

    Naglaa M. Farag

Authors
  1. Abdelsadek H. Alaarag
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  2. Osama I. Mohammad
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  3. Naglaa M. Farag
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Corresponding author

Correspondence to Osama I. Mohammad.

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Alaarag, A.H., Mohammad, O.I. & Farag, N.M. Diagnostic utility of serum adenosine deaminase level in the diagnosis of pulmonary tuberculosis. Egypt J Bronchol 10, 133–139 (2016). https://doi.org/10.4103/1687-8426.184369

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  • DOI: https://doi.org/10.4103/1687-8426.184369

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