Better Tests for TB in Southeast Asia: GeneXpert and TB LAMP Stand Out

Pulmonary Tuberculosis remains a major public health problem in lower middle income countries of the ASEAN, where limited resources and testing capacity often delay detection and treatment. To probe which laboratory tools work best under these conditions, a team led by Patrick R de Vera conducted a systematic review of the scientific literature. The review gathered and examined studies that used laboratory tests for diagnosing active pulmonary tuberculosis in adults in these lower middle income settings. The investigators focused on how well each test identified true cases and ruled out people without disease, information that matters when clinics must decide which tools to choose. By looking across many studies, the goal was to compare commonly used approaches and present clear information about strengths and limitations for health programs in resource-limited contexts. This work is presented as a structured effort to summarize available evidence so health planners and clinicians in the region can better understand which diagnostic tests may reduce delays in identifying and treating people with active pulmonary tuberculosis.

The review used a structured literature search to collect studies that reported the diagnostic performance of selected laboratory methods. The authors assessed sensitivity, specificity and predicted values for the tests, following PRISMA guidelines to organize the search and selection process. Study quality was appraised using QUADAS-2 to flag potential biases and concerns in the underlying research. In a preliminary synthesis of the evidence, GeneXpert demonstrated high sensitivity and specificity when compared to conventional microscopy, suggesting it detects more true cases and more reliably excludes non-cases. The review also highlights TB LAMP as a feasible alternative in low resource countries, offering a practical option where settings may lack the infrastructure for more complex equipment. These findings are drawn directly from the collected studies and the authors’ comparison of diagnostic metrics across the evaluated tests.

The results point to practical choices for programs trying to improve tuberculosis detection in lower middle income countries of the ASEAN. If GeneXpert is available, its high sensitivity and specificity relative to conventional microscopy could help clinics find more people with active disease and reduce missed diagnoses. Where GeneXpert cannot be deployed or maintained, TB LAMP presents a feasible alternative that may be better suited to low-resource laboratories than conventional microscopy alone. The review underlines the importance of using diagnostic methods whose performance has been evaluated for the specific conditions of these health systems, and it suggests that investing in accurate laboratory tests could help shorten the time to diagnosis. By summarizing the evidence and assessing study quality with QUADAS-2, the work provides a clearer picture of which tools are most promising for improving pulmonary tuberculosis diagnosis in the region.