Burkholderia pseudomallei is difficult to detect environmentally with conventional culture. CRISPR-BEEPs was benchmarked against plate inspection using double-qPCR as reference. Sensitivity was 93.5% versus 19.4%, with specificity of 100% versus 98.0%. Across 15,118 km² in northeast Thailand, the assay detected the organism in 73.3% of groundwater, 32.9% of surface water and 26.2% of piped-water samples. Detection within 10 km of a household was associated with melioidosis (OR 2.74), an association missed by conventional methods.
Key findings
- Sensitivity was 93.5% versus 19.4%, and specificity 100% versus 98.0%. Detection prevalence was 73.3% in groundwater, 32.9% in surface water and 26.2% in piped water. Detection within 10 km was associated with disease (OR 2.74; 95% CI 1.38-5.48), an association not identified by culture.
Why this matters globally
The study shows that a more sensitive assay does more than increase positive counts; it changes the visibility of spatial risk. If field costs and workflows are practical, the method could support water surveillance, sanitation prioritization and risk communication across endemic regions.
Thai researcher contribution
The work is driven by a broad Thai institutional network spanning Mahidol, MORU, Burapha, VISTEC, Kasetsart, Sappasithiprasong Hospital, Chulalongkorn and Chiang Mai, linking assay development, laboratory science, clinical medicine and field epidemiology in an endemic setting.
Limitations to consider
Double-qPCR is a molecular reference and does not establish organism viability in every sample. A 10-km association cannot prove that sampled water caused an individual's infection and may reflect occupational, behavioral or geographic confounding. The abstract does not report cost, turnaround, training burden or routine-program performance.