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Impact of Sputum Sampling Instructional Video on Ziehl-Neelsen Positivity in Tuberculosis Diagnostic Centers at BOMA: Multicenter Randomized Controlled Trial

DOI: 10.4236/oalib.1107328, PP. 1-14

Subject Areas: Public Health, Internal Medicine

Keywords: Tuberculosis, Video, Ziehl-Neelsen, Boma

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Abstract

Background and Purpose: Tuberculosis is a global scourge. In DRC, Ziehl-Neelsen (ZN) is the most widely used reference test for the detection of Mycobacterium tuberculosis. Its performance can be improved by certain strategies before sputum collection, particularly the instructional video. The purpose of this study is to evaluate the effectiveness of the instructional video showing and explaining appropriate sputum collection techniques for the diagnosis of tuberculosis. Methods: Multicenter, single-blind, randomized controlled trial conducted in Boma. Two hundred suspected TB assigned at random, either to the intervention group (n = 100) before sputum collection, or to the control group (n = 100). Sputum quality was assessed by appearance and volume before ZN staining by laboratory technicians blind to study groups. Results: The mean age was 38.1 ± 16.0 years. In the two samples (Contact and morning), the positive smear rate was very significant (p < 0.0001) in the intervention group vs control group (46% vs 19% contact smear and 48% vs 18% morning smear), the smear bacillary density rate was very significant (p < 0.0001) in the video group vs non-video group (e.g. 20% vs 4% more density) and, the rates of the mucous appearance purulent and volume ≥ 3 ml were very significant (p < 0.0001) in the intervention group vs control group (91% vs 66% aspect and 54% vs 21% volume). Conclusion: Instructional video is a strategy that improves ZN yield and sputum quality.

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Sumbu, A. K. , Natuhoyila, A. N. , Bahinzi, L. , Metila, O. L. , Steve, A. M. and Mbenza, B. L. (2021). Impact of Sputum Sampling Instructional Video on Ziehl-Neelsen Positivity in Tuberculosis Diagnostic Centers at BOMA: Multicenter Randomized Controlled Trial . Open Access Library Journal, 8, e7328. doi: http://dx.doi.org/10.4236/oalib.1107328.

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