Assessment of the relationship between entomologic indicators of Aedes aegypti and the epidemic occurrence of dengue virus 3 in a susceptible population, Sao Jose do Rio Preto, Sao Paulo, Brazil

Author(s)

Chiaravalloti-Neto, Francisco ^[1] ; Pereira, Mariza ^[2] ; Favaro, Eliane Aparecida ^[3] ; Dibo, Margareth Regina ^[4] ; Mondini, Adriano ^[5] ; Rodrigues-Junior, Antonio Luiz ^[6] ; Chierotti, Ana Patricia ^[4] ; Nogueira, Mauricio Lacerda ^[3]

Affiliation

^[1] Univ Sao Paulo, Fac Saude Publ, Dept Epidemiol, BR-01246904 Sao Paulo - Brazil

^[2] Diretoria Combate Vetores Superintendencia Contro, BR-01027000 Sao Paulo - Brazil

^[3] Fac Med Sao Jose do Rio Preto, Virol Lab, BR-15090000 Sao Jose Do Rio Preto, SP - Brazil

^[4] Lav Vetores Sao Jose do Rio Preto Superintendenci, BR-15090000 Sao Jose Do Rio Preto, SP - Brazil

^[5] Univ Estadual Paulista, Fac Ciencias Farmaceut, BR-14801902 Araraquara, SP - Brazil

^[6] Univ Sao Paulo, Fac Med Ribeirao Preto, Dept Social Med, BR-14049900 Ribeirao Preto, SP - Brazil

• Document type: Journal article
• Source: Acta Tropica; v. 142, p. 167-177, FEB 2015.
• Web of Science Citations: 5

Abstract

The aims of this study were to describe the occurrence of dengue in space and time and to assess the relationships between dengue incidence and entomologic indicators. We selected the dengue autochthonous cases that occurred between September 2005 and August 2007 in Sao Jose do Rio Preto to calculate incidence rates by month, year and census tracts. The monthly incidence rates of the city were compared to the monthly Breteau indices (BI) of the Sao Jose do Rio Region. Between December 2006 and February 2007, an entomological survey was conducted to collect immature forms of Aedes aegypti in Jaguare, a Sao Jose do Rio Preto neighborhood, and to obtain entomological indices. These indices were represented using statistical interpolation. To represent the occurrence of dengue in the Jaguare neighborhood in 2006 and 2007, we used the Kernel ratio and to evaluate the relationship between dengue and the entomological indices, we used a generalized additive model in a spatial case-control design. Between September 2005 and August 2007, the occurrence of dengue in Sao Jose do Rio Preto was almost entirely caused by DENV3, and the monthly incidence rates presented high correlation coefficients with the monthly BI. In Jaguare neighborhood, the entomological indices calculated by hectare were better predictors of the spatial distribution of dengue than the indices calculated by properties, but the pupae quantification did not show better prediction qualities than the indices based on the container positivity, in relation to the risk of dengue occurrence. The fact that the municipality's population had a high susceptibility to the serotype DENV3 before the development of this research, along with the almost total predominance of the occurrence of this serotype between 2005 and 2007, facilitated the analysis of the epidemiological situation of the disease and allowed us to connect it to the entomological indicators. (C) 2014 The Authors. Published by Elsevier B.V. (AU)

• FAPESP's process: 06/02473-0 - Identification of risk factors for buildings infestation by Aedes aegypti and higher productivity containers of pupae, São José do Rio Preto, SP
• Grantee: Eliane Aparecida Fávaro
• Support type: Scholarships in Brazil - Doctorate
• FAPESP's process: 05/02800-8 - Identification of risk factors for the infestation of premises by Aedes aegypti and types of breeding containers which produce the major number of pupae in São José do Rio Preto, São Paulo
• Grantee: Francisco Chiaravalloti Neto
• Support type: Regular Research Grants