In:
PLOS Neglected Tropical Diseases, Public Library of Science (PLoS), Vol. 17, No. 9 ( 2023-9-28), p. e0011536-
Abstract:
Since 2014, Brazil has experienced an unprecedented epidemic caused by chikungunya virus (CHIKV), with several waves of East-Central-South-African (ECSA) lineage transmission reported across the country. In 2018, Rio de Janeiro state, the third most populous state in Brazil, reported 41% of all chikungunya cases in the country. Here we use evolutionary and epidemiological analysis to estimate the timescale of CHIKV-ECSA-American lineage and its epidemiological patterns in Rio de Janeiro. We show that the CHIKV-ECSA outbreak in Rio de Janeiro derived from two distinct clades introduced from the Northeast region in mid-2015 (clade RJ1, n = 63/67 genomes from Rio de Janeiro) and mid-2017 (clade RJ2, n = 4/67). We detected evidence for positive selection in non-structural proteins linked with viral replication in the RJ1 clade (clade-defining: nsP4-A481D) and the RJ2 clade (nsP1-D531G). Finally, we estimate the CHIKV-ECSA’s basic reproduction number ( R 0 ) to be between 1.2 to 1.6 and show that its instantaneous reproduction number ( R t ) displays a strong seasonal pattern with peaks in transmission coinciding with periods of high Aedes aegypti transmission potential. Our results highlight the need for continued genomic and epidemiological surveillance of CHIKV in Brazil, particularly during periods of high ecological suitability, and show that selective pressures underline the emergence and evolution of the large urban CHIKV-ECSA outbreak in Rio de Janeiro.
Type of Medium:
Online Resource
ISSN:
1935-2735
DOI:
10.1371/journal.pntd.0011536
DOI:
10.1371/journal.pntd.0011536.g001
DOI:
10.1371/journal.pntd.0011536.g002
DOI:
10.1371/journal.pntd.0011536.g003
DOI:
10.1371/journal.pntd.0011536.g004
DOI:
10.1371/journal.pntd.0011536.t001
DOI:
10.1371/journal.pntd.0011536.s001
DOI:
10.1371/journal.pntd.0011536.s002
DOI:
10.1371/journal.pntd.0011536.s003
DOI:
10.1371/journal.pntd.0011536.s004
DOI:
10.1371/journal.pntd.0011536.s005
DOI:
10.1371/journal.pntd.0011536.s006
DOI:
10.1371/journal.pntd.0011536.s007
DOI:
10.1371/journal.pntd.0011536.s008
DOI:
10.1371/journal.pntd.0011536.s009
DOI:
10.1371/journal.pntd.0011536.s010
DOI:
10.1371/journal.pntd.0011536.r001
DOI:
10.1371/journal.pntd.0011536.r002
DOI:
10.1371/journal.pntd.0011536.r003
DOI:
10.1371/journal.pntd.0011536.r004
Language:
English
Publisher:
Public Library of Science (PLoS)
Publication Date:
2023
detail.hit.zdb_id:
2429704-5
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