Clinical Report: Evaluating the Diagnostic Precision of Rapid Tests for Vibrio cholerae
Overview
This systematic review and meta-analysis evaluated the field diagnostic accuracy of rapid diagnostic tests (RDTs) for Vibrio cholerae serogroups O1 and O139 against the 2024 Global Task Force on Cholera Control (GTFCC) target product profile.
Background
Cholera is an acute secretory diarrheal disease that can cause severe dehydration and has high lethality if untreated. Timely detection of epidemic-causing V cholerae O1 and O139 is critical for surveillance, outbreak response, oral cholera vaccine deployment, and water, sanitation, and hygiene resource allocation. Conventional culture takes several days, whereas RDTs provide portable testing with minimal infrastructure requirements.
Data Highlights
The analysis included 22 studies comprising 46 data points and 20 353 specimens. Pooled sensitivity and specificity were both 0.95, exceeding the 2024 GTFCC minimum surveillance thresholds of 90% sensitivity and 85% specificity.
Key Findings
Current cholera RDTs met or exceeded the 2024 GTFCC performance standards.
Single-target tests had pooled sensitivity of 0.96 and specificity of 0.97 and performed significantly better than dual-target O1/O139 assays.
Alkaline peptone water enrichment significantly reduced sensitivity from 0.96 to 0.94 without significantly improving specificity.
RDT performance did not differ significantly across Africa, Asia, and the Americas.
The diagnostic odds ratio was higher when PCR rather than culture was the reference standard, suggesting that culture-based evaluations underestimate RDT performance.
Clinical Implications
The findings support using cholera RDTs for field surveillance and outbreak response. The authors recommend prioritizing single-target O1 RDTs used directly on stool without enrichment where O1 predominates. RDTs should be embedded within tiered surveillance, with standardized interpretation training and index-case confirmation when resources permit. Negative results should not independently exclude highly suspected cholera.
Conclusion
Current cholera RDTs meet updated global performance standards. Single-target O1 assays used without enrichment may optimize surveillance, and incorporating PCR confirmation into future evaluations could reduce culture-related bias.
Related Resources & Content
GTFCC, 2024: Target product profile for a rapid diagnostic test for cholera surveillance
PRISMA 2020: Updated reporting guideline for systematic reviews
QUADAS-2: Quality and risk-of-bias assessment for diagnostic-accuracy studies
Clinical Microbiology and Infection, 2022: Systematic review and meta-analysis of cholera RDT accuracy
Diagnostics, 2021: Updated meta-analysis of RDTs for detecting V cholerae O1
PLoS Medicine, 2023: Meta-analysis estimating the proportion of suspected cholera cases representing true V cholerae infections
International Journal of Infectious Diseases, 2026:Diagnostic accuracy of rapid diagnostic tests for Vibrio cholerae serogroups O1 and O139: A systematic review and meta-analysis
Federal prosecutors allege that a Florida physician and research staff fabricated clinical trial records that were submitted into database systems used to evaluate investigational drugs.
