Use este identificador para citar ou linkar para este item: http://repositorio.bc.ufg.br/handle/ri/16704
Tipo do documento: Artigo
Título: Prevalence and incidence of dengue virus and antibody placental transfer during late pregnancy in central Brazil
Autor: Argolo, Ângela Ferreira Lopes Teive e
Feres, Valéria Christina de Rezende
Silveira, Lucimeire Antonelli da
Oliveira, Anna Carolina M.
Pereira, Luiz Augusto
Siqueira Júnior, João Bosco
Braga, Cynthia
Martelli, Celina Maria Turchi
Abstract: Background: Maternal dengue antibodies are considered to play a significant role in dengue pathogenesis among infants. Determining the transplacental specific antibody transfer is invaluable for establishing the optimal vaccination age among infants in endemic regions. Methods: We conducted a cross-sectional study among pairs of maternal and corresponding umbilical cord blood samples in public hospitals. The prevalence and incidence of dengue infection were determined in 505 pairs of pregnant women and neonates during a large outbreak (2009–2010) in central Brazil. The women were interviewed at late pregnancy to assess current or past symptoms of dengue. All parturients and their neonates were screened using Dengue IgG Indirect ELISA (Panbio) to assess previous dengue exposure. A semi-quantitative measurement of the IgG antibody expressed by the index ratio was calculated using optical density (OD) values according to the manufacturer’s instructions. The studied population of parturients and their offspring was also screened for recent dengue infection by the Dengue IgM-capture ELISA (Panbio). Those participants with history of fever and two or more symptoms of dengue at least 10 days before the delivery were also tested for the dengue NS1 antigen using the Dengue Early ELISA (Panbio) and RT-PCR. Results: The mean maternal age was 25.8 (SD = 6.4), and 83.6% of deliveries were between 37 and 41 weeks. Approximately half of the 505 women and neonates were IgG-seropositive, yielding 99.3% co-positive mother-child frequency of antibody transfer (Kappa = 0.96). The incidence of dengue infection was 2.8% (95% CI 1.4–4.4%) among the women considering 14 IgM-positive results and one DENV2 detected by RT-PCR. The dengue NS1 antigen was undetectable in the matched pairs. Conclusion: This study provides critical data on the prevalence of transplacental transferred maternal-infant anti-dengue antibodies and incidence of infection. The design of future vaccine trials should consider diverse regional epidemiological scenarios.
Palavras-chave: Vertical transmission
Dengue
Prevalence
Incidence
Pregnant
Neonate
País: Gra-bretanha
Unidade acadêmica: Instituto de Patologia Tropical e Saúde Pública - IPTSP (RG)
Citação: ARGOLO, Angela F. L. T. et al. Prevalence and incidence of dengue virus and antibody placental transfer during late pregnancy in central Brazil. BMC Infectious Diseases, London, v. 13, n. 254, 2013.
Tipo de acesso: Acesso Aberto
Identificador do documento: 10.1186 /1471-2334-13-254
Identificador do documento: 10.1186 /1471-2334-13-254
URI: http://repositorio.bc.ufg.br/handle/ri/16704
Data de publicação: 2013
Aparece nas coleções:IPTSP - Artigos publicados em periódicos

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