Data on dengue incidence in South-eastern Brazil, 2014 – 2018
Description
The present cohort study was set up with the aim of determining the incidence of dengue among children and adolescents, from 2 to 16 years of age, living in Araraquara, South-Eastern Brazil, a city classified as a mid-level endemicity location for dengue. Enrollment took place from September 2014 to March 2015. Baseline socio-demographic data were collected, and a blood sample from the participant was drawn, for dengue serology. Families were contacted weekly for fever surveillance. If the child developed fever, a nurse visited the household to collect a blood sample. PCR, NS1 and IgM were used for dengue diagnosis. Parents or legal guardians of participating children provided a written informed consent. 3,514 children and adolescents were enrolled in the cohort. Dengue baseline seroprevalence was 12.2% (95%CI: 11.1 – 13.3). The incidence density of symptomatic dengue was 8.94 per 100 person/years in the first year of follow-up, 0.58 in the second, and 0.19 in the fourth. No cases were confirmed in the third year. Incidence was associated with age, sex, baseline seroprevalence and with living in a house as opposed to an apartment. The dataset includes the data gathered in the enrollment interview with the parent/legal guardian (age and sex of the participating child/adolescent, characteristics of the household, sanitation, schooling of the head of the household); the IgG serology results (baseline and yearly serologic surveys); and the fever surveillance visits and laboratory results (signs and symptoms accompanying thefever episode, results of dengue PCR, NS1, IgGM and IgG). Some variables were created from the ones collected in the field: if the participant had a symptomatic laboratory confirmed dengue episode; if the participant had a innaparent infection; and which dengue virus was detected among the confirmed cases.