Journal of Medical Laboratory and Diagnosis
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Article Number - 01BF4D944779


Vol.5(2), pp. 14-21 , February 2014
DOI: 10.5897/JMLD2013.0086
ISSN: 2141-2618



Full Length Research Paper

Laboratory diagnostic systems used in the diagnosis of tuberculosis in Ethiopia: A systematic review



Addisu Melese Dagnaw
  • Addisu Melese Dagnaw
  • Department of Medicine, College of Medicine and Health Sciences, Debre Tabor University, Debre Tabor, Ethiopia
  • Google Scholar
Balew Zeleke Tiruneh
  • Balew Zeleke Tiruneh
  • Department of Nursing, College of Medicine and Health Sciences, Bahir Dar University, Bahir Dar, Ethiopia
  • Google Scholar







 Accepted: 13 January 2014  Published: 28 February 2014

Copyright © 2014 Author(s) retain the copyright of this article.
This article is published under the terms of the Creative Commons Attribution License 4.0


Laboratories and laboratory tests are fundamental components of tuberculosis control programme; providing testing for diagnosis, surveillance and treatment monitoring at every level of health care system. This review is therefore, aimed at comparing and summarizing data on these laboratory systems used in the diagnosis of tuberculosis in Ethiopia. A systematic review of literature addressing the diagnosis of tuberculosis in Ethiopia was carried out. Literature search was done in MEDLINE and EMBASE for articles published from 2000 to 2013. We used the following search terms: Laboratory, tuberculosis, diagnosis and Ethiopia. Only studies addressing diagnostic systems of tuberculosis and English language publications were included. A total of 267 potential studies were identified by the search. Thirty-three studies qualified for the review. The reported diagnostic systems used to diagnose tuberculosis (TB) in Ethiopia included symptom screening, physical examination, chest X-ray, histology, histopathology, cytology, smear microscopy, tuberculin skin test (TST), QuantiFERON TB gold in tube and culture. Ten (30.3%) studies utilized culture as the reference standard and only one study employed polymerase chain reaction (PCR) as a standardized test. Most studies have used more than one diagnostic system. Four (12.5%) studies reported the use of sample processing methods (liquefaction and concentration of sputum using either sodium hypochlorite or sodium hydroxide followed by centrifugation) before actual tests, twenty seven (81.8%) studies used direct smear microscopy, three (9.4%) studies used TST and QuantiFERON-TB Gold In-Tube test (QFTGIT) together and two (6.3%) studies employed cytological techniques. Chest X-ray was employed in the majority of smear negative results with symptomatic patients suggestive of tuberculosis. The results of this review suggest that there is a need for revising the diagnostic systems. Most of the laboratory tests employed was based on direct smear microscopy which is insensitive and can only detect 36% of tuberculosis cases in Ethiopia. This may result in misdiagnosis of the disease and further transmission of the disease, especially in children and populations with high human immunodeficiency virus (HIV) co-infection. Therefore, there is need for laboratories to find a rapid and efficient method for TB diagnosis as a complement to the smear microscopy.

 

Key words: Diagnosis, laboratory, tuberculosis, Ethiopia.

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APA (2014). Laboratory diagnostic systems used in the diagnosis of tuberculosis in Ethiopia: A systematic review. Journal of Medical Laboratory and Diagnosis, 5(2), 14-21.
Chicago Addisu Melese Dagnaw and Balew Zeleke Tiruneh. "Laboratory diagnostic systems used in the diagnosis of tuberculosis in Ethiopia: A systematic review." Journal of Medical Laboratory and Diagnosis 5, no. 2 (2014): 14-21.
MLA Addisu Melese Dagnaw and Balew Zeleke Tiruneh. "Laboratory diagnostic systems used in the diagnosis of tuberculosis in Ethiopia: A systematic review." Journal of Medical Laboratory and Diagnosis 5.2 (2014): 14-21.
   
DOI 10.5897/JMLD2013.0086
URL http://academicjournals.org/journal/JMLD/article-abstract/01BF4D944779

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