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Development and validation of a multiplexed-tandem qPCR tool for diagnostics of human soil-transmitted helminth infections
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Development and validation of a multiplexed-tandem qPCR tool for diagnostics of human soil-transmitted helminth infections
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Development and validation of a multiplexed-tandem qPCR tool for diagnostics of human soil-transmitted helminth infections
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Journal Article
Development and validation of a multiplexed-tandem qPCR tool for diagnostics of human soil-transmitted helminth infections
2019
Overview
Soil-transmitted helminths (STH) are a major cause of morbidity in tropical developing countries with a global infection prevalence of more than one billion people and disease burden of around 3.4 million disability adjusted life years. Infection prevalence directly correlates to inadequate sanitation, impoverished conditions and limited access to public health systems. Underestimation of infection prevalence using traditional microscopy-based diagnostic techniques is common, specifically in populations with access to benzimidazole mass treatment programs and a predominance of low intensity infections. In this study, we developed a multiplexed-tandem qPCR (MT-PCR) tool to identify and quantify STH eggs in stool samples. We have assessed this assay by measuring infection prevalence and intensity in field samples of two cohorts of participants from Timor-Leste and Cambodia, which were collected as part of earlier epidemiological studies. MT-PCR diagnostic parameters were compared to a previously published multiplexed qPCR for STH detection. The MT-PCR assay agreed strongly with qPCR data and showed a diagnostic specificity of 99.60-100.00% (sensitivity of 83.33-100.00%) compared to qPCR and kappa agreement exceeding 0.85 in all tests. In addition, the MT-PCR has the added advantage of distinguishing Ancylostoma spp. species, namely Ancylostoma duodenale and Ancylostoma ceylanicum. This semi-automated platform uses a standardized, manufactured reagent kit, shows excellent run-to-run consistency/repeatability and supports high-throughput detection and quantitation at a moderate cost.
Publisher
Public Library of Science,Public Library of Science (PLoS)
Subject
/ Adult
/ Aged
/ Animals
/ Cambodia
/ Child
/ Cohorts
/ Disease
/ DNA
/ Eggs
/ Female
/ Helminths - isolation & purification
/ Humans
/ Hygiene
/ Infant
/ Intestinal Diseases, Parasitic - diagnosis
/ LDCs
/ Male
/ Medicine
/ Medicine and Health Sciences
/ Molecular diagnostic techniques
/ Molecular Diagnostic Techniques - methods
/ Multiplex Polymerase Chain Reaction - methods
/ PCR
/ Poverty
/ Reagents
/ Real-Time Polymerase Chain Reaction - methods
/ Research and Analysis Methods
/ Samples
/ Soil
