Viral genome-based Zika virus transmission dynamics in a paediatric cohort during the 2016 Nicaragua epidemic.
| Autor: | Sun H; Saw Swee Hock School of Public Health, National University of Singapore and National University Health System, Singapore., Binder RA; Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, CA, USA; Sustainable Sciences Institute, Managua, Nicaragua., Dickens B; Saw Swee Hock School of Public Health, National University of Singapore and National University Health System, Singapore., de Sessions PF; Genome Institute of Singapore, A*STAR, Singapore, Singapore., Rabaa MA; The Hospital for Tropical Diseases, Wellcome Trust Major Overseas Programme, Oxford University Clinical Research Unit, Ho Chi Minh City, Vietnam; Centre for Tropical Medicine, Nuffield Department of Medicine, Oxford University, Oxford, UK., Ho EXP; Genome Institute of Singapore, A*STAR, Singapore, Singapore., Cook AR; Saw Swee Hock School of Public Health, National University of Singapore and National University Health System, Singapore., Carrillo FB; Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, CA, USA; Sustainable Sciences Institute, Managua, Nicaragua., Monterrey JC; Sustainable Sciences Institute, Managua, Nicaragua., Kuan G; Sustainable Sciences Institute, Managua, Nicaragua; Health Center Sócrates Flores Vivas, Ministry of Health, Managua, Nicaragua., Balmaseda A; Sustainable Sciences Institute, Managua, Nicaragua; Laboratorio Nacional de Virología, Centro Nacional de Diagnóstico y Referencia, Ministry of Health, Managua, Nicaragua., Ooi EE; Saw Swee Hock School of Public Health, National University of Singapore and National University Health System, Singapore; Duke-NUS Medical School, Singapore, Singapore., Harris E; Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, CA, USA., Sessions OM; Saw Swee Hock School of Public Health, National University of Singapore and National University Health System, Singapore; Duke-NUS Medical School, Singapore, Singapore; Department of Pharmacy, National University of Singapore, Singapore. Electronic address: October.sessions@nus.edu.sg. |
|---|---|
| Jazyk: | angličtina |
| Zdroj: | EBioMedicine [EBioMedicine] 2021 Oct; Vol. 72, pp. 103596. Date of Electronic Publication: 2021 Oct 07. |
| DOI: | 10.1016/j.ebiom.2021.103596 |
| Abstrakt: | Background: Nicaragua experienced a large Zika epidemic in 2016, with up to 50% of the population in Managua infected. With the domesticated Aedes aegypti mosquito as its vector, it is widely assumed that Zika virus transmission occurs within the household and/or via human mobility. We investigated these assumptions by using viral genomes to trace Zika transmission spatially. Methods: We analysed serum samples from 119 paediatric Zika cases participating in the long-standing Paediatric Dengue Cohort Study in Managua, which was expanded to include Zika in 2015. An optimal spanning directed tree was constructed by minimizing the differences in viral sequence diversity composition between patient nodes, where low-frequency variants were used to increase the resolution of the inferred Zika outbreak dynamics. Findings: Out of the 18 houses where pairwise difference in sample collection dates among all the household members was within 30 days, we only found two where viruses from individuals within the same household were up to 10 th -most closely linked to each other genetically. We also identified a substantial number of transmission events involving long geographical distances (n=30), as well as potential super-spreading events in the estimated transmission tree. Interpretation: Our finding highlights that community transmission, often involving long geographical distances, played a much more important role in epidemic spread than within-household transmission. Funding: This study was supported by an NUS startup grant (OMS) and grants R01 AI099631 (AB), P01 AI106695 (EH), P01 AI106695-03S1 (FB), and U19 AI118610 (EH) from the US National Institutes of Health. Competing Interests: Declaration of Competing Interest The authors declare no potential conflict of interests related to this work. (Copyright © 2021 The Authors. Published by Elsevier B.V. All rights reserved.) |
| Databáze: | MEDLINE |
| Externí odkaz: |
|