Evidence of Co-Circulation of Multiples Arbovirus Transmitted by Aedes Sp. Based on Laboratorial Syndromic Surveillance At Health Unit in Slum Area of Federal District, Brazil

Abstract

Background: Mosquito-borne disease, especially arbovirus transmitted by Aedes mosquitoes, must be priority of Brazilian public health policies, mainly with others infectious agents in circulation. Laboratorial syndromic surveillance for fever or/and exanthematic acute syndrome was performed at health unit in slum area of Federal District. Methods: between June/2019 and March/2020, stopped by COVID-19 pandemic, 131 valid participants were identified and tested by RT-PCR for dengue (by serotype), chikungunya and Zika virus; and by serological IgM for dengue and chikungunya virus, with serologic assay performed when the participant did not present respiratory symptoms (cough or/and coryza). Results: 3 DENV-1 (2.3%), 4 DENV-2 (3%) and 1 CHIKV (0.7%) was lab-confirmed, showing evidence of hiperendemicity area even with the laboratorial syndromic surveillance not reaching the months of historical peak of dengue in Federal District (April-May). When compared the results of laboratorial syndromic surveillance with traditional epidemiologic surveillance data, is verified significant discrepancy between probable cases (from traditional surveillance) and lab-confirmed cases (from laboratorial syndromic surveillance). Conclusions: beyond the risks of local population are exposed, the socio-environment profile can be an able potential area to spread arbovirus, according to Aedes sp. dynamics and human mobility of the Federal District. Also, traditional surveillance may be misreporting probable cases for dengue infection, and underreporting confirmed cases for other arbovirus in the Federal District.