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Evaluation of the efficacy of different methodologies for flebotomine collection in urban area

Grant number: 22/02724-5
Support type:Scholarships in Brazil - Scientific Initiation
Effective date (Start): April 01, 2022
Effective date (End): November 30, 2022
Field of knowledge:Health Sciences - Collective Health - Epidemiology
Principal researcher:Vera Lucia Fonseca de Camargo Neves
Grantee:Brenda Vilela Machado
Home Institution: Superintendência de Controle de Endemias (SUCEN). Secretaria da Saúde (São Paulo - Estado). São Paulo , SP, Brazil
Associated research grant:17/50345-5 - Institutional development plan in research and technology for vector surveillance and control of the Superintendência do Controle de Endemias - SUCEN (PDIp), AP.PDIP

Abstract

For entomological surveillance of sandflies (Diptera, Psychodidae), vectors of leishmaniasis, entomological captures are recommended using two methods: (1) manual collections with electric vacuum cleaners in resting places of the insect and (2) exposure of traps with light bait, in likely locations of vector creation. Few studies have compared the use of these methods, especially in urban areas. Although it is common sense that the use of different methods increases the effectiveness of capture, for the implementation of an entomological surveillance system in a broad way in the municipality, costs and available resources such as equipment and human resources must be considered. This study aims to evaluate the effectiveness of the methods currently used for the capture of sandflies, comparing the abundance, richness, dominance and diversity obtained with these methods and to know the distribution pattern of the most epidemiologically important species, in order to seek indicators for the direction of control activities. For this project, samples of sandflies collected in the urban area of the municipality of Castilho-SP will be used, which makes up the set of municipalities that are part of the subproject "Prospective study of natural infection and eating habits aimed at families Diptera: Psychodidae, vectors of diseases in different ESP biomes", Fapesp PDIP/SUCEN project nº 2017/50345-5. The sandflies collected will be identified according to Galati (2003). The PDIP information system will be used to compile the data. To obtain the ecological indicators, the software Past v.4.05 will be used. For the comparison of the methods, the abundance of sandflies and the average densities according to the methodology by the sampling effort (in minutes) will be used the chi-square tests and the Kruskal-Wallis tests (for the data set of the sectors) and Mann-Whitney (for paired samples) respectively, for a significance level of 5%, using SPSS v. 25. The analysis of the distribution of positive households and the density of sand flies will be carried out using heat maps with ArcGis v.10 software. (AU)

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