ABSTRACT
We investigated dengue and chikungunya virus antibody seroprevalence in French Polynesia during 2014-2015. Dengue virus seroprevalence was ≈60% among schoolchildren and >83% among the general population; chikungunya virus seroprevalence was <3% before and 76% after Zika virus emergence (2013). Dengue virus herd immunity may affect Zika virus infection and pathogenesis.
Subject(s)
Antibodies, Viral/immunology , Chikungunya Fever/epidemiology , Chikungunya Fever/immunology , Chikungunya virus/immunology , Dengue Virus/immunology , Dengue/epidemiology , Dengue/immunology , Adolescent , Adult , Antibodies, Neutralizing/immunology , Chikungunya Fever/history , Child , Child, Preschool , Dengue/history , History, 21st Century , Humans , Middle Aged , Neutralization Tests , Polynesia/epidemiology , Seroepidemiologic Studies , Young AdultABSTRACT
Ross River virus (RRV), spread by Aedes and Culex mosquitoes, is the most commonly transmitted arbovirus in Australia. A serosurvey of blood donors in French Polynesia during 2011-2013 suggested that RRV circulated without being detected. We report RRV circulation in French Polynesia based on further screening of blood samples collected during 2014-2015.
Subject(s)
Aedes/virology , Alphavirus Infections/epidemiology , Antibodies, Viral/blood , Culex/virology , Immunoglobulin G/blood , Insect Vectors/virology , Ross River virus/isolation & purification , Adolescent , Adult , Aged , Aged, 80 and over , Alphavirus Infections/transmission , Alphavirus Infections/virology , Animals , Asymptomatic Diseases , Blood Donors , Child , Cross-Sectional Studies , Female , Humans , Male , Middle Aged , Polynesia/epidemiology , Ross River virus/immunology , Seroepidemiologic StudiesABSTRACT
During 2013-2014, French Polynesia experienced an outbreak of Zika virus infection. Serosurveys conducted at the end of the outbreak and 18 months later showed lower than expected disease prevalence rates (49%) and asymptomatic:symptomatic case ratios (1:1) in the general population but significantly different prevalence rates (66%) and asymptomatic:symptomatic ratios (1:2) in schoolchildren.