article · Tuberculosis Research and Treatment
Smear microscopy remains a primary tool for diagnosing pulmonary tuberculosis in resource-limited, high-burden settings. This comparative study evaluated the diagnostic yield and speed of fluorescence microscopy against conventional Ziehl-Neelsen staining using sputum samples from one hundred suspected tuberculosis patients at a district hospital in Ghana. Two samples per patient were analysed using both staining methods as well as the Xpert MTB/RIF assay. Among the two hundred samples, the molecular assay detected tuberculosis in 42.0 percent, fluorescence microscopy in 35.5 percent, and Ziehl-Neelsen staining in 23.0 percent. When compared to the molecular assay, fluorescence staining achieved 84.5 percent sensitivity and 100 percent specificity, whereas Ziehl-Neelsen staining achieved only 54.8 percent sensitivity. Furthermore, fluorescence microscopy reduced reading time threefold, taking an average of 1.5 minutes per smear compared to 4.6 minutes for the conventional technique.
Tuberculosis remains a critical global health challenge where rapid, accurate diagnosis is essential for stopping transmission. In resource-limited clinics that cannot afford expensive molecular testing for every patient, fluorescence microscopy provides a practical alternative. It detects substantially more cases than conventional chemical staining and delivers results in a third of the time, helping healthcare workers diagnose and treat patients much faster.
This applied clinical evaluation demonstrates that fluorescence microscopy is ready for immediate operational deployment in district hospitals and diagnostic centres. Diagnostic laboratory suppliers, public health agencies, and clinic operators in resource-constrained environments can adopt fluorescence systems to upgrade routine smear analysis. The approach improves clinical throughput and case detection without requiring the continuous expense of molecular diagnostic cartridges.
AI-generated from the published abstract. Always read the original work before citing.
Background . Despite the recent advancement in diagnostic methods, the smear microscopy remains the gold standard for the diagnosis of pulmonary tuberculosis in high burden countries like Ghana. Notwithstanding, fluorescence staining technique provides a more efficient option for the detection of Mycobacterium tuberculosis positive smears. This study therefore aimed at assessing the diagnostic performance of fluorescence microscopy (FM) and Ziehl-Neelsen (ZN) staining techniques in the diagnosis of pulmonary tuberculosis. Methods . A comparative study was carried out on 100 patients who reported at the Out Patients Department (OPD) or the Directly Observed Therapy (DOT) center of the Kade Government Hospital and were suspected of having pulmonary tuberculosis. Two (2) sputum samples each were collected. This included one spot and one morning sample. The smears were prepared and stained with FM and ZN staining techniques. Xpert MTB/RIF assay was also performed. Results . Of the 200 samples analyzed, 71 (35.5%), 46 (23.0%), and 84 (42.0%) were positive for pulmonary tuberculosis when FM, ZN, and XPERT MTB/RIF assays were used, respectively. The mean reading time of FM was three times faster than the ZN technique with very good acceptance (1.5min: 4.6min). The sensitivity and specificity of fluorescent staining to that of XPERT MTB/RIF assay were 84.5% and 100%, respectively, while those of ZN staining were 54.8% and 100%, respectively. Conclusion . For a routine laboratory test in a resource-limited setting, our study has demonstrated that fluorescence staining technique is a more sensitive test for the diagnosis of pulmonary tuberculosis as compared to the conventional ZN technique.
This page summarises published work. The authoritative version sits with the publisher.
DOI: 10.1155/2019/4091937
Is something wrong with this record? Report it or request removal.
Discussion
Have you built on this work, tried to replicate it, or seen it applied in practice? Share what you know. Verified researchers and MARATTO™ domain experts can open a discussion, and any member can reply. Contributions are reviewed before they appear.
No discussion yet. Open the first thread.
New to MARATTO™? Create a free account.
