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Rethinking soil-transmitted helminth diagnostics in the genomic era: Does genetic variation matter?
Marina Papaiakovou1, Cinzia Cantacessi2
1Department of Veterinary Medicine, University of Cambridge, Cambridge, United Kingdom; Wellcome Sanger Institute, Hinxton, United Kingdom.
Advances in Parasitology
|July 23, 2026
Summary
Genetic diversity in soil-transmitted helminths (STHs) can impact molecular diagnostic accuracy. New genomic approaches are needed to ensure sensitive detection and effective control of these global health threats.
Area of Science:
- Parasitology
- Molecular Diagnostics
- Genomic Epidemiology
Background:
- Soil-transmitted helminths (STHs) are a major global health concern.
- Microscopy is traditional, but molecular tests like quantitative PCR (qPCR) offer greater sensitivity and throughput.
- Recent studies reveal significant genetic diversity within STH populations, potentially affecting diagnostic targets.
Purpose of the Study:
- To review advances in STH genomics and genetic diversity assessment.
- To highlight the impact of genetic variation on molecular diagnostic sensitivity.
- To emphasize the need for diagnostic tools that account for genetic diversity.
Main Methods:
- Review of current STH genomics literature.
- Assessment of genetic diversity in STH populations using fecal samples.
- Evaluation of molecular diagnostic targets in light of genetic variation.
Main Results:
- Limited parasite isolates used in current qPCR assays may overlook substantial genetic variation.
- Genetic diversity can reduce the sensitivity of molecular diagnostics, leading to false negatives.
- Assessing diversity directly from fecal samples is crucial due to difficulties in obtaining adult worms.
Conclusions:
- Thorough evaluation of diagnostic methods is essential before implementation.
- Genomic epidemiology is key for sustainable STH control.
- Accounting for genetic diversity will improve diagnostic accuracy and guide public health policy for STH deworming cessation.
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