2020 Ebola virus disease outbreak in Équateur Province, Democratic Republic of the Congo: a retrospective genomic characterisation

被引：6

作者：

Kinganda-Lusamaki, Eddy ^{[1
,2
,11
]}

Whitmer, Shannon ^{[3
]}

Ko, Emmanuel Lokilo-Lo fi ^{[1
]}

Amuri-Aziza, Adrienne ^{[1
]}

Muyembe-Mawete, Francisca ^{[1
,2
]}

Makangara-Cigolo, Jean Claude ^{[1
,2
]}

Makaya, Gerry ^{[5
]}

Mbuyi, Francis ^{[5
]}

Whitesell, Amy ^{[2
]}

Kallay, Ruth ^{[4
]}

Choi, Mary ^{[3
]}

Pratt, Catherine ^{[6
]}

Mukadi-Bamuleka, Daniel ^{[1
,2
]}

Kavunga-Membo, Hugo ^{[1
]}

Matondo-Kuamfumu, Meris ^{[1
,2
]}

Mambu-Mbika, Fabrice ^{[1
,2
]}

Ekila-Ifinji, Richard ^{[1
,2
]}

Shoemaker, Trevor ^{[3
]}

Stewart, Miles ^{[12
]}

Eng, Julia ^{[12
]}

Rajan, Abraham ^{[12
]}

Soke, Gnakub N. ^{[14
]}

Fonjungo, Peter N. ^{[15
]}

Otshudiema, John Otokoye ^{[8
]}

Folefack, Gervais Leon Tengomo ^{[8
]}

Pukuta-Simbu, Elisabeth ^{[1
]}

Talundzic, Emir ^{[3
]}

Shedroff, Elizabeth ^{[3
]}

Bokete, Jacques Likofata ^{[8
]}

Legand, Anais ^{[13
]}

Formenty, Pierre ^{[13
]}

Mores, Christopher N. ^{[9
]}

Porzucek, Abigail J. ^{[9
]}

Tritsch, Sarah R. ^{[9
]}

Kombe, John ^{[10
]}

Tshapenda, Gaston ^{[10
]}

Mulangu, Felix ^{[10
]}

Ayouba, Ahidjo ^{[11
]}

Delaporte, Eric ^{[11
]}

Peeters, Martine ^{[11
]}

Wiley, Michael R. ^{[6
,7
]}

Montgomery, Joel M. ^{[3
]}

Klena, John D. ^{[3
]}

Muyembe-Tamfum, Jean-Jacques ^{[1
,2
]}

Ahuka-Mundeke, Steve ^{[1
,2
]}

Mbala-Kingebeni, Placide ^{[1
,2
]}

机构：

[1] Inst Natl Rech Biomed, Pathogen Genom Lab, BP 1197, Kinshasa, DEM REP CONGO

[2] Serv Microbiol, Clin Univ, Fac Med, Univ Kinshasa, Kinshasa, DEM REP CONGO

[3] US Ctr Dis Control & Prevent, Viral Special Pathogens Branch, Atlanta, GA USA

[4] US Ctr Dis Control & Prevent, Emergency Response & Recovery Branch, Atlanta, GA USA

[5] Vysnova Partners, Landover, MD USA

[6] Univ Nebraska Med Ctr, Coll Publ Hlth, Dept Environm Agr & Occupat Hlth, Omaha, NE USA

[7] PraesensBio, Omaha, NE USA

[8] WHO Hlth Emergencies Programme, WHO, Kinshasa, DEM REP CONGO

[9] George Washington Univ, Milken Inst Sch Publ Hlth, Global Hlth Dept, Washington, DC USA

[10] Minist Hlth, Kinshasa, DEM REP CONGO

[11] Univ Montpellier, Inst Rech Dev, TransVIHMI, INSERM, Montpellier, France

[12] Johns Hopkins Univ, Appl Phys Lab, Laurel, MD USA

[13] WHO, Hlth Emergencies Programme, Geneva, Switzerland

[14] US Ctr Dis Control & Prevent, Div Global Hlth Protect, Kinshasa, DEM REP CONGO

[15] US Ctr Dis Control & Prevent, Div Global HIV & TB, Kinshasa, DEM REP CONGO

来源：

LANCET MICROBE | 2024年 / 5卷 / 02期

基金：

英国惠康基金;

关键词：

SEXUAL TRANSMISSION; SURVEILLANCE; SURVIVORS; RELAPSE;

D O I：

10.1016/S2666-5247(23)00259-8

中图分类号：

R51 [传染病];

学科分类号：

100401 ;

摘要：

Background The Democratic Republic of the Congo has had 15 Ebola virus disease (EVD) outbreaks, from 1976 to 2023. On June 1, 2020, the Democratic Republic of the Congo declared an outbreak of EVD in the western equateur Province (11th outbreak), proximal to the 2018 Tumba and Bikoro outbreak and concurrent with an outbreak in the eastern Nord Kivu Province. In this Article, we assessed whether the 11th outbreak was genetically related to previous or concurrent EVD outbreaks and connected available epidemiological and genetic data to identify sources of possible zoonotic spillover, uncover additional unreported cases of nosocomial transmission, and provide a deeper investigation into the 11th outbreak. Methods We analysed epidemiological factors from the 11th EVD outbreak to identify patient characteristics, epidemiological links, and transmission modes to explore virus spread through space, time, and age groups in the equateur Province, Democratic Republic of the Congo. Trained field investigators and health professionals recorded data on suspected, probable, and confirmed cases, including demographic characteristics, possible exposures, symptom onset and signs and symptoms, and potentially exposed contacts. We used blood samples from individuals who were live suspected cases and oral swabs from individuals who were deceased to diagnose EVD. We applied whole-genome sequencing of 87 available Ebola virus genomes (from 130 individuals with EVD between May 19 and Sept 16, 2020), phylogenetic divergence versus time, and Bayesian reconstruction of phylogenetic trees to calculate viral substitution rates and study viral evolution. We linked the available epidemiological and genetic datasets to conduct a genomic and epidemiological study of the 11th EVD outbreak. Findings Between May 19 and Sept 16, 2020, 130 EVD (119 confirmed and 11 probable) cases were reported across 13 equateur Province health zones. The individual identified as the index case reported frequent consumption of bat meat, suggesting the outbreak started due to zoonotic spillover. Sequencing revealed two circulating Ebola virus variants associated with this outbreak-a Mbandaka variant associated with the majority (97%) of cases and a Tumbalike variant with similarity to the ninth EVD outbreak in 2018. The Tumba-like variant exhibited a reduced substitution rate, suggesting transmission from a previous survivor of EVD. Interpretation Integrating genetic and epidemiological data allowed for investigative fact -checking and verified patientreported sources of possible zoonotic spillover. These results demonstrate that rapid genetic sequencing combined with epidemiological data can inform responders of the mechanisms of viral spread, uncover novel transmission modes, and provide a deeper understanding of the outbreak, which is ultimately needed for infection prevention and control during outbreaks.

引用

页码：e109 / e118

页数：10

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