Distribuição espacial de infecção humana por dengue, chikungunya e zika

Abstract

Dengue, Chikungunya and Zika are vector-borne diseases which are common related to rainy summer season as it is a favourable condition period for increasing their vectors population density, Aedes aegypti and Ae. albopictus. The aim of this study was relate the incidence levels of human infection by dengue, chikungunya and zika in an Ae. Aegypti infestation areas, such as the urban area from the city of Dourados, Mato Grosso do Sul – Brazil, from January 2014 to December 2017. Throughout those studied years, the total confirmed cases were 4,025 by dengue, 02 by chikungunya and 14 by zika. Human infection rates by dengue were higher at the epidemic peak along the four-year evaluation, following the increasing of Ae. aegypti vector infested rate along the rain season. Human infection by dengue was higher in 2005 and 2006, causing two consecutive epidemics with a higher rate of infection by Ae. aegypti up to 4%. However, infections by dengue were not land infestation rate dependents at interepidemic periods. The two subsequent epidemic, which may have been caused by introducing serotype 4, occurred regardless any control measurement and/or environmental condition, which are explained by viral circulation dynamic with depletion of susceptible in 2017.