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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Aedes aegypti entomological indices in an endemic area for dengue in Sao Paulo State, Brazil

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Author(s):
Favaro, Eliane A. [1] ; Dibo, Margareth R. [2] ; Pereira, Mariza [3] ; Chierotti, Ana P. [2] ; Rodrigues-Junior, Antonio L. [4] ; Chiaravalloti-Neto, Francisco [5]
Total Authors: 6
Affiliation:
[1] Fac Med Sao Jose Rio Preto, Virol Lab, Sao Jose Do Rio Preto, SP - Brazil
[2] Superintendencia Controle Endemias, Lab Vetores, Sao Jose Do Rio Preto, SP - Brazil
[3] Superintendencia Controle Endemias Estado Sao Paul, Diretoria Combate Vetores, Sao Paulo - Brazil
[4] Univ Sao Paulo, Dept Social Med, Fac Med Ribeirao Preto, BR-14049 Ribeirao Preto, SP - Brazil
[5] Univ Sao Paulo, Fac Saude Publ, Dept Epidemiol, BR-01246904 Sao Paulo - Brazil
Total Affiliations: 5
Document type: Journal article
Source: Revista de Saúde Pública; v. 47, n. 3, p. 588-597, JUN 2013.
Web of Science Citations: 8
Abstract

OBJECTIVE: To evaluate the most productive types of properties and containers for Aedes aegypti and the spatial distribution of entomological indices. METHODS: Between December 2006 and February 2007, the vector's immature forms were collected to obtain entomological indices in 9,875 properties in the Jaguare neighborhood of Sao Jose do Rio Preto, SP, Southeastern Brazil. In March and April 2007, a questionnaire about the conditions and characteristics of properties was administered. Logistic regression was used to identify variables associated with the presence of pupae at the properties. Indices calculated per block were combined with a geo-referenced map, and thematic maps of these indices were obtained using statistical interpolation. RESULTS: The properties inspected had the following Ae. aegypti indices: Breteau Index = 18.9, 3.7 larvae and 0.42 pupae per property, 5.2 containers harboring Ae. aegypti per hectare, 100.0 larvae and 11.6 pupae per hectare, and 1.3 larvae and 0.15 pupae per inhabitant. The presence of yards, gardens and animals was associated with the presence of pupae. CONCLUSIONS: Specific types of properties and containers that simultaneously had low frequencies among those positive for the vector and high participation in the productivity of larvae and pupae were not identified. The use of indices including larval and pupal counts does not provide further information beyond that obtained from the traditional Stegomyia indices in locations with characteristics similar to those of Sao Jose do Rio Preto. The indices calculated per area were found to be more accurate for the spatial assessment of infestation. The Ae. aegypti infestation levels exhibited extensive spatial variation, indicating that the assessment of infestation in micro areas is needed. (AU)

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