Dengue occurrence and its relationship to vector control measures and infestation levels of Aedes aegypti in a Brazilian city
Introduction: Several authors have pointed out limitations of measures adopted to control Aedes aegypti and dengue. Also, there is a lack of evidence about the relationship between Ae. aegypti infestation level indicators and dengue occurrence. Our objective was to evaluate the relationship between...
| Autores: | , , , , |
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| Formato: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2020 |
| País: | Brasil |
| Recursos: | Secretaria de Estado da Saúde de São Paulo (SES-SP) |
| Repositorio: | BEPA. Boletim epidemiológico paulista (Online) |
| Idioma: | portugués |
| OAI Identifier: | oai:ojs.periodicos.saude.sp.gov.br:article/33972 |
| Acesso em linha: | https://periodicos.saude.sp.gov.br/BEPA182/article/view/33972 |
| Access Level: | acceso abierto |
| Palavra-chave: | Dengue Aedes aegypti Controle Entomologia Análise espacial Control Entomology Spatial analysis Brazil |
| Resumo: | Introduction: Several authors have pointed out limitations of measures adopted to control Aedes aegypti and dengue. Also, there is a lack of evidence about the relationship between Ae. aegypti infestation level indicators and dengue occurrence. Our objective was to evaluate the relationship between dengue occurrence and control and infestation measures for Ae. aegypti in a Brazilian southeastern city from 2001 to 2006. Methods: Dengue incidence rate (dependent variable) and the coverage of control activities and infestation index (covariates) were calculated using spatial units and years. We fitted spatiotemporal Zero-Inflated Poisson models, considering the following periods: September 2001 to August 2006 and September 2003 to August 2006. Results: Routine mosquito breeding control activity (with regular visits to all premises) was considered a protective factor for dengue occurrence. However, to effectively control occurrence, this activity needed to reach coverage corresponding to one visit every fortnight. The Breteau Index presented a direct but weak relationship with dengue occurrence. Conclusions: Routine activity is one of the most important control measures applied against dengue in Brazil. Despite this measure being developed without interruption and being the most expensive measure applied for dengue control, it proved inefficient because of the very high coverage necessary for effective control. Thus, a re-evaluation of the dengue control program in Brazil is urgently required to improve efficiencies. The Breteau Index results were attributed to a lack of fitting the model regarding the varying levels of immunity for the circulating serotypes in the study area, both in space and in time. |
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