1. Repositório Institucional da UFMG
  2. Publicações Científicas e Culturais
  3. Artigo de Periódico
Please use this identifier to cite or link to this item: http://hdl.handle.net/1843/60393
Full metadata record
DC FieldValueLanguage
dc.creatorZoraima Netopt_BR
dc.creatorAna Luísa Micolo Cândidopt_BR
dc.creatorFilipa Vazpt_BR
dc.creatorGisel Reyes Castropt_BR
dc.creatorJoana Paula Paixãopt_BR
dc.creatorNicholas J. Lomanpt_BR
dc.creatorPhilippe Lemeypt_BR
dc.creatorOliver G. Pybuspt_BR
dc.creatorJocelyne Vasconcelospt_BR
dc.creatorJoana de Moraispt_BR
dc.creatorPedro a. Martinezpt_BR
dc.creatorSarah C. Hillpt_BR
dc.creatorDomingos Jandondopt_BR
dc.creatorJulien Thézépt_BR
dc.creatorMarinela Mirandelapt_BR
dc.creatorRenato Santana de Aguiarpt_BR
dc.creatorJoilson Xavierpt_BR
dc.creatorCruz Dos Santos Sebastiãopt_BR
dc.creatorNuno Rodrigues Fariapt_BR
dc.date.accessioned2023-10-31T21:33:12Z-
dc.date.available2023-10-31T21:33:12Z-
dc.date.issued2022-05-18-
dc.citation.volume16pt_BR
dc.citation.issue5pt_BR
dc.citation.spagee0010255pt_BR
dc.citation.epage17pt_BR
dc.identifier.doihttps://doi.org/10.1371/journal.pntd.0010255pt_BR
dc.identifier.issn1935-2735pt_BR
dc.identifier.urihttp://hdl.handle.net/1843/60393-
dc.description.resumoBackground The transmission patterns and genetic diversity of dengue virus (DENV) circulating in Africa remain poorly understood. Circulation of the DENV serotype 1 (DENV1) in Angola was detected in 2013, while DENV serotype 2 (DENV2) was detected in 2018. Here, we report results from molecular and genomic investigations conducted at the Ministry of Health national reference laboratory (INIS) in Angola on suspected dengue cases detected between January 2017 and February 2019. Methods A total of 401 serum samples from dengue suspected cases were collected in 13 of the 18 provinces in Angola. Of those, 351 samples had complete data for demographic and epidemiological analysis, including age, gender, province, type of residence, clinical symptoms, as well as dates of onset of symptoms and sample collection. RNA was extracted from residual samples and tested for DENV-RNA using two distinct real time RT-PCR protocols. On-site whole genome nanopore sequencing was performed on RT-PCR+ samples. Bayesian coalescent models were used to estimate date and origin of outbreak emergence, as well as population growth rates. Results Molecular screening showed that 66 out of 351 (19%) suspected cases were DENV-RNA positive across 5 provinces in Angola. DENV RT-PCR+ cases were detected more frequently in urban sites compared to rural sites. Of the DENV RT-PCR+ cases most were collected within 6 days of symptom onset. 93% of infections were confirmed by serotype-specific RT-PCR as DENV2 and 1 case (1.4%) was confirmed as DENV1. Six CHIKV RT-PCR+ cases were also detected during the study period, including 1 co-infection of CHIKV with DENV1. Most cases (87%) were detected in Luanda during the rainy season between April and October. Symptoms associated with severe dengue were observed in 11 patients, including 2 with a fatal outcome. On-site nanopore genome sequencing followed by genetic analysis revealed an introduction of DENV2 Cosmopolitan genotype (also known as DENV2-II genotype) possibly from India in or around October 2015, at least 1 year before its detection in the country. Coalescent models suggest relatively moderately rapid epidemic growth rates and doubling times, and a moderate expansion of DENV2 in Angola during the studied period. Conclusion This study describes genomic, epidemiological and demographic characteristic of predominately urban transmission of DENV2 in Angola. We also find co-circulation of DENV2 with DENV1 and CHIKV and report several RT-PCR confirmed severe dengue cases in the country. Increasing dengue awareness in healthcare professional, expanding the monitorization of arboviral epidemics across the country, identifying most common mosquito breeding sites in urban settings, implementing innovative vector control interventions and dengue vaccination campaigns could help to reduce vector presence and DENV transmission in Angola. Author summary Angola has experienced dengue, yellow fever and Zika virus outbreaks between 2013–2017. To improve the detection of arbovirus outbreaks in Angola, we set up the National Arbovirus Laboratory of Surveillance Programme at the National Institute of Health Research (INIS), Ministry of Health, Angola, which officially kick-started arbovirus surveillance activities in early 2017. In this study we tested samples collected from patients with suspected dengue cases between January 2017 to February 2019. We report molecular and genomic findings on DENV2 transmission in Angola. On-site whole genome sequencing and subsequent phylogenetic analysis indicate a single introduction of the DENV2 Cosmopolitan genotype (also known as DENV2-II genotype) from Southern Asia, probably as a result of international travel, followed by moderate virus population growth. In Angola, most detections occurred in urban areas, although we detected DENV2 in 5 of the 18 provinces in Angola. This work emphasizes the importance of maintaining an active arbovirus surveillance programme throughout the country to investigate DENV transmission patterns and evaluate the risk of hyperendemicity in Angola.pt_BR
dc.description.sponsorshipFAPESP - Fundação de Amparo à Pesquisa do Estado de São Paulopt_BR
dc.format.mimetypepdfpt_BR
dc.languageengpt_BR
dc.publisherUniversidade Federal de Minas Geraispt_BR
dc.publisher.countryBrasilpt_BR
dc.publisher.departmentICB - DEPARTAMENTO DE MICROBIOLOGIApt_BR
dc.publisher.departmentICB - DEPARTAMENTO DE PATOLOGIApt_BR
dc.publisher.departmentICB - INSTITUTO DE CIÊNCIAS BIOLOGICASpt_BR
dc.publisher.initialsUFMGpt_BR
dc.relation.ispartofPLOS Neglected Tropical Diseasespt_BR
dc.rightsAcesso Abertopt_BR
dc.subjectGenomaspt_BR
dc.subjectDenguept_BR
dc.subjectAngolanospt_BR
dc.subject.otherGenomaspt_BR
dc.subject.otherDenguept_BR
dc.subject.otherAngolanospt_BR
dc.titleMolecular and genomic investigation of an urban outbreak of dengue virus serotype 2 in Angola, 2017–2019pt_BR
dc.typeArtigo de Periódicopt_BR
dc.url.externahttps://journals.plos.org/plosntds/article?id=10.1371/journal.pntd.0010255pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0003-1606-9996pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-9886-6448pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-2995-2596pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0001-8188-9494pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0003-3916-2018pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0003-1232-0119pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-7318-693Xpt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-4524-4055pt_BR
Appears in Collections:Artigo de Periódico

Files in This Item:
File Description SizeFormat 
Molecular and genomic investigation of an urban outbreak of dengue virus serotype 2 in Angola, 2017–2019.pdf1.04 MBAdobe PDFView/Open
Show simple item record


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.