Measurement of Circulating Filarial Antigen Levels in Human Blood with a Point-of-Care Test Strip and a Portable Spectrodensitometer.
Identifieur interne : 000E13 ( Main/Exploration ); précédent : 000E12; suivant : 000E14Measurement of Circulating Filarial Antigen Levels in Human Blood with a Point-of-Care Test Strip and a Portable Spectrodensitometer.
Auteurs : Cédric B. Chesnais [Oman] ; Johnny Vlaminck ; Billy Kunyu-Shako ; Sébastien D. Pion ; Naomi-Pitchouna Awaca-Uvon ; Gary J. Weil ; Dieudonné Mumba ; Michel BoussinesqSource :
- The American journal of tropical medicine and hygiene [ 1476-1645 ] ; 2016.
Descripteurs français
- KwdFr :
- MESH :
- diagnostic : Filariose lymphatique.
- immunologie : Wuchereria bancrofti.
- métabolisme : Wuchereria bancrofti.
- sang : Antigènes d'helminthe.
- Analyse sur le lieu d'intervention, Animaux, Bandelettes réactives, Humains, Sensibilité et spécificité.
English descriptors
- KwdEn :
- MESH :
- chemical , blood : Antigens, Helminth.
- diagnosis : Elephantiasis, Filarial.
- immunology : Wuchereria bancrofti.
- metabolism : Wuchereria bancrofti.
- Animals, Humans, Point-of-Care Testing, Reagent Strips, Sensitivity and Specificity.
Abstract
The Alere Filariasis Test Strip (FTS) is a qualitative, point-of-care diagnostic tool that detects Wuchereria bancrofti circulating filarial antigen (CFA) in human blood, serum, or plasma. The Global Program to Eliminate Lymphatic Filariasis employs the FTS for mapping filariasis-endemic areas and assessing the success of elimination efforts. The objective of this study was to explore the relationship between the intensity of positive test lines obtained by FTS with CFA levels as determined by enzyme-linked immunosorbent assay (ELISA) with blood and plasma samples from 188 individuals who live in a filariasis-endemic area. The intensity of the FTS test line was assessed visually to provide a semiquantitative score (visual Filariasis Test Strip [vFTS]), and line intensity was measured with a portable spectrodensitometer (quantitative Filariasis Test Strip [qFTS]). These results were compared with antigen levels measured by ELISA in plasma from the same subjects. qFTS measurements were highly correlated with vFTS scores (ρ = 0.94; P < 0.001) and with plasma CFA levels (ρ = 0.91; P < 0.001). Thus, qFTS assessment is a convenient method for quantifying W. bancrofti CFA levels in human blood, which are correlated with adult worm burdens. This tool may be useful for assessing the impact of treatment on adult filarial worms in individuals and communities.
DOI: 10.4269/ajtmh.15-0916
PubMed: 27114288
Affiliations:
Links toward previous steps (curation, corpus...)
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Le document en format XML
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<author><name sortKey="Awaca Uvon, Naomi Pitchouna" sort="Awaca Uvon, Naomi Pitchouna" uniqKey="Awaca Uvon N" first="Naomi-Pitchouna" last="Awaca-Uvon">Naomi-Pitchouna Awaca-Uvon</name>
<affiliation><nlm:affiliation>Unité Mixte Internationale (UMI) 233, Institut de Recherche pour le Développement (IRD), Montpellier, France; Université Montpellier, Montpellier, France; Institut National de la Santé et de la Recherche Médicale (INSERM) Unité 1175, Montpellier, France; Infectious Diseases Division, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri; Department of Parasitology, National Institute of Biomedical Research (INRB), Kinshasa, Democratic Republic of the Congo; National Onchocerciasis Control Programme, Ministry of Public Health, Kinshasa, Democratic Republic of the Congo.</nlm:affiliation>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Animals</term>
<term>Antigens, Helminth (blood)</term>
<term>Elephantiasis, Filarial (diagnosis)</term>
<term>Humans</term>
<term>Point-of-Care Testing</term>
<term>Reagent Strips</term>
<term>Sensitivity and Specificity</term>
<term>Wuchereria bancrofti (immunology)</term>
<term>Wuchereria bancrofti (metabolism)</term>
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<term>Filariose lymphatique (diagnostic)</term>
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<term>Wuchereria bancrofti (immunologie)</term>
<term>Wuchereria bancrofti (métabolisme)</term>
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<keywords scheme="MESH" qualifier="diagnostic" xml:lang="fr"><term>Filariose lymphatique</term>
</keywords>
<keywords scheme="MESH" qualifier="immunologie" xml:lang="fr"><term>Wuchereria bancrofti</term>
</keywords>
<keywords scheme="MESH" qualifier="immunology" xml:lang="en"><term>Wuchereria bancrofti</term>
</keywords>
<keywords scheme="MESH" qualifier="metabolism" xml:lang="en"><term>Wuchereria bancrofti</term>
</keywords>
<keywords scheme="MESH" qualifier="métabolisme" xml:lang="fr"><term>Wuchereria bancrofti</term>
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<keywords scheme="MESH" qualifier="sang" xml:lang="fr"><term>Antigènes d'helminthe</term>
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<term>Humans</term>
<term>Point-of-Care Testing</term>
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<term>Sensitivity and Specificity</term>
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<front><div type="abstract" xml:lang="en">The Alere Filariasis Test Strip (FTS) is a qualitative, point-of-care diagnostic tool that detects Wuchereria bancrofti circulating filarial antigen (CFA) in human blood, serum, or plasma. The Global Program to Eliminate Lymphatic Filariasis employs the FTS for mapping filariasis-endemic areas and assessing the success of elimination efforts. The objective of this study was to explore the relationship between the intensity of positive test lines obtained by FTS with CFA levels as determined by enzyme-linked immunosorbent assay (ELISA) with blood and plasma samples from 188 individuals who live in a filariasis-endemic area. The intensity of the FTS test line was assessed visually to provide a semiquantitative score (visual Filariasis Test Strip [vFTS]), and line intensity was measured with a portable spectrodensitometer (quantitative Filariasis Test Strip [qFTS]). These results were compared with antigen levels measured by ELISA in plasma from the same subjects. qFTS measurements were highly correlated with vFTS scores (ρ = 0.94; P < 0.001) and with plasma CFA levels (ρ = 0.91; P < 0.001). Thus, qFTS assessment is a convenient method for quantifying W. bancrofti CFA levels in human blood, which are correlated with adult worm burdens. This tool may be useful for assessing the impact of treatment on adult filarial worms in individuals and communities.</div>
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<name sortKey="Boussinesq, Michel" sort="Boussinesq, Michel" uniqKey="Boussinesq M" first="Michel" last="Boussinesq">Michel Boussinesq</name>
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