Serveur d'exploration sur le lymphœdème

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Surveillance efforts after mass drug administration to validate elimination of lymphatic filariasis as a public health problem in Vanuatu

Identifieur interne : 000144 ( Main/Exploration ); précédent : 000143; suivant : 000145

Surveillance efforts after mass drug administration to validate elimination of lymphatic filariasis as a public health problem in Vanuatu

Auteurs : Fasihah Taleo [Vanuatu] ; George Taleo [Vanuatu] ; Patricia M. Graves ; Peter Wood ; Sung Hye Kim [Fidji, Royaume-Uni] ; Masayo Ozaki [Fidji] ; Hayley Joseph ; Brian Chu [États-Unis] ; Alex Pavluck [États-Unis] ; Aya Yajima [Philippines] ; Wayne Melrose ; Kazuyo Ichimori [Suisse, Japon] ; Corinne Capuano [Fidji]

Source :

RBID : PMC:5472907

Abstract

Background

Vanuatu was formerly highly endemic for lymphatic filariasis (LF), caused by Wuchereria bancrofti and transmitted by Anopheles mosquitoes. After a baseline survey showing 4.8% antigen prevalence in 1998, the country conducted nationwide (in one implementation unit) annual mass drug administration (MDA) with albendazole and diethylcarbamazine citrate from 2000 to 2004 and achieved prevalence of 0.2% by 2006 in a representative nationwide cluster survey among all age groups.

Methods

Post MDA surveillance was conducted from 2006 to 2012. After MDA, the country was divided for surveillance into three evaluation units (EUs) formed by grouping provinces according to baseline prevalence: EU1: Torba, Sanma and Malampa; EU2: Penama; EU3: Shefa and Tafea. The study compiled all past data and information on surveys in Vanuatu from the country programme. This paper reviews the surveillance activities done after stopping MDA to validate the interruption of transmission and elimination of LF as a public health problem.

Results

Post-MDA surveillance consisting of at least three transmission assessment surveys (TAS) in each of the three EUs was conducted between 2006 and 2012. Sentinel and spot check surveys identified a few villages with persistent high prevalence; all antigen positive cases in these sites were treated and additional targeted MDA conducted for 3 years in 13 villages in one area of concern. All three EUs passed all TAS in 2007, 2010 and 2012 respectively, with no positives found except in EU2 (Penama province) in 2012 when 2 children tested positive for circulating filariasis antigen. Assessment of the burden of chronic filariasis morbidity found 95 cases in 2003 and 32 remaining cases in 2007, all aged over 60 years.

Conclusions

Vanuatu has achieved validation of elimination of LF as a public health problem. Post-validation surveillance is still recommended especially in formerly highly endemic areas.


Url:
DOI: 10.1186/s41182-017-0057-6
PubMed: 28630586
PubMed Central: 5472907


Affiliations:


Links toward previous steps (curation, corpus...)


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<sec>
<title>Background</title>
<p>Vanuatu was formerly highly endemic for lymphatic filariasis (LF), caused by
<italic>Wuchereria bancrofti</italic>
and transmitted by
<italic>Anopheles</italic>
mosquitoes. After a baseline survey showing 4.8% antigen prevalence in 1998, the country conducted nationwide (in one implementation unit) annual mass drug administration (MDA) with albendazole and diethylcarbamazine citrate from 2000 to 2004 and achieved prevalence of 0.2% by 2006 in a representative nationwide cluster survey among all age groups.</p>
</sec>
<sec>
<title>Methods</title>
<p>Post MDA surveillance was conducted from 2006 to 2012. After MDA, the country was divided for surveillance into three evaluation units (EUs) formed by grouping provinces according to baseline prevalence: EU1: Torba, Sanma and Malampa; EU2: Penama; EU3: Shefa and Tafea. The study compiled all past data and information on surveys in Vanuatu from the country programme. This paper reviews the surveillance activities done after stopping MDA to validate the interruption of transmission and elimination of LF as a public health problem.</p>
</sec>
<sec>
<title>Results</title>
<p>Post-MDA surveillance consisting of at least three transmission assessment surveys (TAS) in each of the three EUs was conducted between 2006 and 2012. Sentinel and spot check surveys identified a few villages with persistent high prevalence; all antigen positive cases in these sites were treated and additional targeted MDA conducted for 3 years in 13 villages in one area of concern. All three EUs passed all TAS in 2007, 2010 and 2012 respectively, with no positives found except in EU2 (Penama province) in 2012 when 2 children tested positive for circulating filariasis antigen. Assessment of the burden of chronic filariasis morbidity found 95 cases in 2003 and 32 remaining cases in 2007, all aged over 60 years.</p>
</sec>
<sec>
<title>Conclusions</title>
<p>Vanuatu has achieved validation of elimination of LF as a public health problem. Post-validation surveillance is still recommended especially in formerly highly endemic areas.</p>
</sec>
</div>
</front>
<back>
<div1 type="bibliography">
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<author>
<name sortKey="Graves, Pm" uniqKey="Graves P">PM Graves</name>
</author>
<author>
<name sortKey="Wood, P" uniqKey="Wood P">P Wood</name>
</author>
<author>
<name sortKey="Bossin, H" uniqKey="Bossin H">H Bossin</name>
</author>
</analytic>
</biblStruct>
<biblStruct></biblStruct>
<biblStruct></biblStruct>
<biblStruct>
<analytic>
<author>
<name sortKey="Bouree, P" uniqKey="Bouree P">P Bouree</name>
</author>
<author>
<name sortKey="Sauvagnac, B" uniqKey="Sauvagnac B">B Sauvagnac</name>
</author>
<author>
<name sortKey="Montaville, B" uniqKey="Montaville B">B Montaville</name>
</author>
</analytic>
</biblStruct>
<biblStruct></biblStruct>
<biblStruct></biblStruct>
<biblStruct></biblStruct>
<biblStruct>
<analytic>
<author>
<name sortKey="Huppatz, C" uniqKey="Huppatz C">C Huppatz</name>
</author>
<author>
<name sortKey="Durrheim, Dn" uniqKey="Durrheim D">DN Durrheim</name>
</author>
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<name sortKey="Capuano, C" uniqKey="Capuano C">C Capuano</name>
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</author>
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<name sortKey="Kelly, Pm" uniqKey="Kelly P">PM Kelly</name>
</author>
</analytic>
</biblStruct>
<biblStruct></biblStruct>
<biblStruct>
<analytic>
<author>
<name sortKey="Huppatz, C" uniqKey="Huppatz C">C Huppatz</name>
</author>
<author>
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</biblStruct>
<biblStruct>
<analytic>
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<author>
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<author>
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</biblStruct>
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<biblStruct>
<analytic>
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</author>
</analytic>
</biblStruct>
</listBibl>
</div1>
</back>
</TEI>
<affiliations>
<list>
<country>
<li>Fidji</li>
<li>Japon</li>
<li>Philippines</li>
<li>Royaume-Uni</li>
<li>Suisse</li>
<li>Vanuatu</li>
<li>États-Unis</li>
</country>
<region>
<li>Géorgie (États-Unis)</li>
</region>
</list>
<tree>
<noCountry>
<name sortKey="Graves, Patricia M" sort="Graves, Patricia M" uniqKey="Graves P" first="Patricia M." last="Graves">Patricia M. Graves</name>
<name sortKey="Joseph, Hayley" sort="Joseph, Hayley" uniqKey="Joseph H" first="Hayley" last="Joseph">Hayley Joseph</name>
<name sortKey="Melrose, Wayne" sort="Melrose, Wayne" uniqKey="Melrose W" first="Wayne" last="Melrose">Wayne Melrose</name>
<name sortKey="Wood, Peter" sort="Wood, Peter" uniqKey="Wood P" first="Peter" last="Wood">Peter Wood</name>
</noCountry>
<country name="Vanuatu">
<noRegion>
<name sortKey="Taleo, Fasihah" sort="Taleo, Fasihah" uniqKey="Taleo F" first="Fasihah" last="Taleo">Fasihah Taleo</name>
</noRegion>
<name sortKey="Taleo, George" sort="Taleo, George" uniqKey="Taleo G" first="George" last="Taleo">George Taleo</name>
</country>
<country name="Fidji">
<noRegion>
<name sortKey="Kim, Sung Hye" sort="Kim, Sung Hye" uniqKey="Kim S" first="Sung Hye" last="Kim">Sung Hye Kim</name>
</noRegion>
<name sortKey="Capuano, Corinne" sort="Capuano, Corinne" uniqKey="Capuano C" first="Corinne" last="Capuano">Corinne Capuano</name>
<name sortKey="Ozaki, Masayo" sort="Ozaki, Masayo" uniqKey="Ozaki M" first="Masayo" last="Ozaki">Masayo Ozaki</name>
</country>
<country name="Royaume-Uni">
<noRegion>
<name sortKey="Kim, Sung Hye" sort="Kim, Sung Hye" uniqKey="Kim S" first="Sung Hye" last="Kim">Sung Hye Kim</name>
</noRegion>
</country>
<country name="États-Unis">
<region name="Géorgie (États-Unis)">
<name sortKey="Chu, Brian" sort="Chu, Brian" uniqKey="Chu B" first="Brian" last="Chu">Brian Chu</name>
</region>
<name sortKey="Pavluck, Alex" sort="Pavluck, Alex" uniqKey="Pavluck A" first="Alex" last="Pavluck">Alex Pavluck</name>
</country>
<country name="Philippines">
<noRegion>
<name sortKey="Yajima, Aya" sort="Yajima, Aya" uniqKey="Yajima A" first="Aya" last="Yajima">Aya Yajima</name>
</noRegion>
</country>
<country name="Suisse">
<noRegion>
<name sortKey="Ichimori, Kazuyo" sort="Ichimori, Kazuyo" uniqKey="Ichimori K" first="Kazuyo" last="Ichimori">Kazuyo Ichimori</name>
</noRegion>
</country>
<country name="Japon">
<noRegion>
<name sortKey="Ichimori, Kazuyo" sort="Ichimori, Kazuyo" uniqKey="Ichimori K" first="Kazuyo" last="Ichimori">Kazuyo Ichimori</name>
</noRegion>
</country>
</tree>
</affiliations>
</record>

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