RESUMO
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.
Assuntos
Anticorpos Antivirais/imunologia , Febre de Chikungunya/epidemiologia , Febre de Chikungunya/imunologia , Vírus Chikungunya/imunologia , Vírus da Dengue/imunologia , Dengue/epidemiologia , Dengue/imunologia , Adolescente , Adulto , Anticorpos Neutralizantes/imunologia , Febre de Chikungunya/história , Criança , Pré-Escolar , Dengue/história , História do Século XXI , Humanos , Pessoa de Meia-Idade , Testes de Neutralização , Polinésia/epidemiologia , Estudos Soroepidemiológicos , Adulto JovemRESUMO
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.
Assuntos
Aedes/virologia , Infecções por Alphavirus/epidemiologia , Anticorpos Antivirais/sangue , Culex/virologia , Imunoglobulina G/sangue , Insetos Vetores/virologia , Ross River virus/isolamento & purificação , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Infecções por Alphavirus/transmissão , Infecções por Alphavirus/virologia , Animais , Doenças Assintomáticas , Doadores de Sangue , Criança , Estudos Transversais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Polinésia/epidemiologia , Ross River virus/imunologia , Estudos SoroepidemiológicosRESUMO
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.
