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Abstract

On 11 May 2015, the Dubréka prefecture, Guinea, reported nine laboratory-confirmed cases of Ebola virus disease (EVD). None could be epidemiologically linked to cases previously reported in the prefecture. We describe the epidemiological and molecular investigations of this event. We used the Dubréka EVD registers and the Ebola treatment centre’s (ETC) records to characterise chains of transmission. Real-time field Ebola virus sequencing was employed to support epidemiological results. An epidemiological cluster of 32 cases was found, of which 27 were laboratory confirmed, 24 were isolated and 20 died. Real-time viral sequencing on 12 cases demonstrated SL3 lineage viruses with sequences differing by one to three nt inside a single phylogenetic cluster. For isolated cases, the average time between symptom onset and ETC referral was 2.8 days (interquartile range (IQR): 1–4). The average time between sample collection and molecular results’ availability was 3 days (IQR: 2–5). In an area with scarce resources, the genetic characterisation supported the outbreak investigations in real time, linking cases where epidemiological investigation was limited and reassuring that the responsible strain was already circulating in Guinea. We recommend coupling thorough epidemiological and genomic investigations to control EVD clusters.

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/content/10.2807/1560-7917.ES.2018.23.12.17-00140
2018-03-22
2024-12-22
/content/10.2807/1560-7917.ES.2018.23.12.17-00140
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Field investigation with real-time virus genetic characterisation support of a cluster of Ebola virus disease cases in Dubréka, Guinea, April to June 2015
<p class="citation"> <span>Citation style for this article:</span> <span class="meta-value authors"> <a href="/search?value1=Alessandro+Pini&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Pini Alessandro</a>, <a href="/search?value1=Delayo+Zomahoun&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Zomahoun Delayo</a>, <a href="/search?value1=Sophie+Duraffour&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Duraffour Sophie</a>, <a href="/search?value1=Tarik+Derrough&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Derrough Tarik</a>, <a href="/search?value1=Myrna+Charles&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Charles Myrna</a>, <a href="/search?value1=Joshua+Quick&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Quick Joshua</a>, <a href="/search?value1=Nick+Loman&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Loman Nick</a>, <a href="/search?value1=Lauren+Cowley&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Cowley Lauren</a>, <a href="/search?value1=Mamadou+Leno&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Leno Mamadou</a>, <a href="/search?value1=Nobila+Ouedraogo&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Ouedraogo Nobila</a>, <a href="/search?value1=Oumou+Thiam&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Thiam Oumou</a>, <a href="/search?value1=Alfonso+Hern%C3%A1ndez-Romieu&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Hernández-Romieu Alfonso</a>, <a href="/search?value1=Annie+Iko&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Iko Annie</a>, <a href="/search?value1=Halimatou+Keita&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Keita Halimatou</a>, <a href="/search?value1=Djiba+Konate&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Konate Djiba</a>, <a href="/search?value1=Aboubacar+Aboubak+Soumah&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Soumah Aboubacar Aboubak</a>, <a href="/search?value1=Etran+Bouchouar&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Bouchouar Etran</a>, <a href="/search?value1=Samuel+Ileka-Priouzeau&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Ileka-Priouzeau Samuel</a>, <a href="/search?value1=Sakoba+Keita&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Keita Sakoba</a>, <a href="/search?value1=Boubacar+Diallo&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Diallo Boubacar</a>, <a href="/search?value1=Fode+Cisse&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Cisse Fode</a>, <a href="/search?value1=Josep+Jansa&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Jansa Josep</a>, <a href="/search?value1=Miles+Carroll&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Carroll Miles</a>, <a href="/search?value1=Stephan+G%C3%BCnther&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Günther Stephan</a>, <a href="/search?value1=Ettore+Severi&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Severi Ettore</a>, <a href="/search?value1=Pierre+Formenty&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Formenty Pierre</a></span>. Field investigation with real-time virus genetic characterisation support of a cluster of Ebola virus disease cases in Dubréka, Guinea, April to June 2015. <a href="/content/ecdc">Euro Surveill.</a> 2018;23(12):pii=17-00140. <a href="https://doi.org/10.2807/1560-7917.ES.2018.23.12.17-00140" title="doi link" target="_blank">https://doi.org/10.2807/1560-7917.ES.2018.23.12.17-00140</a> <span class="ES_Article_citation"> <span class="generated">Received</span>: 23 Feb 2017;&nbsp;&nbsp; <span class="generated">Accepted</span>: 01 Jun 2017 </span> </p>
/content/10.2807/1560-7917.ES.2018.23.12.17-00140
/content/10.2807/1560-7917.ES.2018.23.12.17-00140
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