Please use this identifier to cite or link to this item: https://observatorio.fm.usp.br/handle/OPI/34016
Title: Emergence of the Asian lineage of Zika virus in Angola: an outbreak investigation
Authors: HILL, Sarah C.VASCONCELOS, JocelyneNETO, ZoraimaJANDONDO, DomingosZE-ZE, LibiaAGUIAR, Renato SantanaXAVIER, JoilsonTHEZE, JulienMIRANDELA, MarinelaCANDIDO, Ana Luisa MicoloVAZ, FilipaSEBASTIAO, Cruz dos SantosWU, Chieh-HsiKRAEMER, Moritz U. G.MELO, AdrianaSCHAMBER-REIS, Bruno L. F.AZEVEDO, Girlene S. deTANURI, AmilcarHIGA, Luiza M.CLEMENTE, CarinaSILVA, Sara Pereira daCANDIDO, Darlan da SilvaCLARO, Ingra M.QUIBUCO, DomingosDOMINGOS, CristovaoPOCONGO, BarbaraWATTS, Alexander G.KHAN, KamranALCANTARA, Luiz Carlos JuniorSABINO, Ester C.LACKRITZ, EvePYBUS, Oliver G.ALVES, Maria-JoaoAFONSO, JoanaFARIA, Nuno R.
Citation: LANCET INFECTIOUS DISEASES, v.19, n.10, p.1138-1147, 2019
Abstract: Background Zika virus infections and suspected microcephaly cases have been reported in Angola since late 2016, but no data are available about the origins, epidemiology, and diversity of the virus. We aimed to investigate the emergence and circulation of Zika virus in Angola. Methods Diagnostic samples collected by the Angolan Ministry of Health as part of routine arboviral surveillance were tested by real-time reverse transcription PCR by the Instituto Nacional de Investigacao em Saude (Ministry of Health, Luanda, Angola). To identify further samples positive for Zika virus and appropriate for genomic sequencing, we also tested samples from a 2017 study of people with HIV in Luanda. Portable sequencing was used to generate Angolan Zika virus genome sequences from three people positive for Zika virus infection by real-time reverse transcription PCR, including one neonate with microcephaly. Genetic and mobility data were analysed to investigate the date of introduction and geographical origin of Zika virus in Angola. Brain CT and MRI, and serological assays were done on a child with microcephaly to confirm microcephaly and assess previous Zika virus infection. Findings Serum samples from 54 people with suspected acute Zika virus infection, 76 infants with suspected microcephaly, 24 mothers of infants with suspected microcephaly, 336 patients with suspected dengue virus or chikungunya virus infection, and 349 samples from the HIV study were tested by real-time reverse transcription PCR. Four cases identified between December, 2016, and June, 2017, tested positive for Zika virus. Analyses of viral genomic and human mobility data suggest that Zika virus was probably introduced to Angola from Brazil between July, 2015, and June, 2016. This introduction probably initiated local circulation of Zika virus in Angola that continued until at least June, 2017. The infant with microcephaly in whom CT and MRI were done had brain abnormalities consistent with congenital Zika syndrome and serological evidence for Zika virus infection. Interpretation Our analyses show that autochthonous transmission of the Asian lineage of Zika virus has taken place in Africa. Zika virus surveillance and surveillance of associated cases of microcephaly throughout the continent is crucial.
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Artigos e Materiais de Revistas Científicas - FM/MIP
Departamento de Moléstias Infecciosas e Parasitárias - FM/MIP

Artigos e Materiais de Revistas Científicas - LIM/46
LIM/46 - Laboratório de Parasitologia Médica

Artigos e Materiais de Revistas Científicas - ODS/03
ODS/03 - Saúde e bem-estar

Artigos e Materiais de Revistas Científicas - ODS/05
ODS/05 - Igualdade de gênero


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