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Aedes aegypti
Spatial Analysis of Aedes aegypti (Diptera: Culicidae) Distribution in different areas of the city of Rio de Janeiro. Izabel Cristina dos Reis; Nildimar Honório, Claudia Codeço; Christovam Barcellos; Mônica Magalhães. Fiocruz - RJ Introduction Aedes aegypti - Vector of dengue fever in Brazil Rio de Janeiro 46.857 dengue fever 74 DHF 14 death RJ: 10% Urban and suburban environments Good oviposition sites – tires, water boxes ,vases of plants, bottles Introduction Strategical sites (SS) – Areas were with large amount of containers (deposits of use tires, junk yard, tire dealer, cemeteries, among others) or areas with large amounts of small and medium size containers, in favorable conditions (transporter, road, port and airports among other) (sucen, 2002). Produce large mosquito populations Act as souce of mosquitos for areas with low production The identification of strategical sites is key for the development of optimized vector control strategies The households near of strategical sites are more infested with Ae. aegypti than housesholds further them . Objective Assess in the summer and winter period of 2007, the distribution of the Ae. aegypti in three locatities of Rio de Janeiro, and its association with the presence of strategicals sites. Study area Summer and Winter of 2007 Study area (500m2) – population density, vegetation coverge and history of dengue fever. Survey 80 households and 5 strategical sites; 40 ovitraps (capturing immature formas) e 40 MosquiTraps (capturing adults) = 240 Households: 1 ovitrap or MosquiTrap; SS: Both = 10 in each area 7 days Survey traps were visited every week Identified and counted; Data analysis Gaussian Kernel to weekly data - Aedes aegypti ( males and females) – ArcGis 9.1 (LabGeo/ICIC/Fiocruz/RJ) Hotspots Strategical sites Associations between SSs and infestation level – calculated distribution of captured individuals by distance from each SS. Distance from the SS at each 25% e 50% of mosquitos were found; Software R. Data analysis Kriging ordinary, Exponential – mosquitos Ae. aegypti in the households and eggs in the SS Semivariogram – infested with Ae. aegypti in the households Gaussian Kernel - Higienópolis - Summer 1, 2, 3 e 5- Oficina mecânica 4 - Transporter 1, 2, 3 e 5Mechanics 4 - Transporter 1, 2, 3 e 5Mechanics 4 - Transporter Gaussian Kernel - Palmares - Summer 1- empty lot 2,3, 4 - Recyclings 5 - Mechanics 1- empty lot 2,3, 4 - Recyclings 5 - Mechanics 1- empty lot 2,3, 4 - Recyclings 5 - Mechanics Gaussian Kernel - Tubiacanga Summer 1, 2- boats factory 3 - Mechanics 4 – junk yard 5 – Empty lot 1, 2- boats factory 3 - Mechanics 4 – junk yard 5 – Empty lot 1, 2- boats factory 3 - Mechanics 4 – junk yard 5 – Empty lot Higienópolis summer Lag size: 150 number of lags: 7 Number of eggs - SS Number of adults - households Higienópolis winter Number of eggs - SS Number of adults - households Lag size: 150 number of lags: 7 Number of eggs - SS ME Number of adults - households Palmares summer Lag size: 2,5 number of lags: 10 Number of eggs - SS ME Number of adults - households Palmares winter Lag size: 2,5 number of lags: 10 Tubiacanga Summer Number of eggs - SS Lag size: 50 number of lags: 7 Number of adults - households Tubiacanga winter Number of eggs - SS Lag size: 50 number of lags: 7 Number of adults - households Adults Macho e Fêmea de Aedes aegypti Valor de p - verão 2007 1 Valor de p - verão 2007 Larva de Aedes aegypti Larvae 1 0.8 0.8 ME 0.4 RE TP Valores de p p50esp<vobs 0.6 0.6 p25esp<vobs RE JY 0.4 p50esp<vobs 0.2 0.2 H 35 H 31 H 33 H 29 T 09 H 27 T 05 T 07 0.8 RE 0.6 ME BF 0.4 p25esp<vobs p50esp<vobs 0.2 Pontos Estratégicos Strategical sites H 35 H 33 H 31 H 29 H 27 T 09 T 07 T 05 T 03 T 01 P 25 P 23 P 21 P 19 0 P 17 BF – Boat factory 1 Valores de p JY – Junk Yard Valor de p - verão 2007 Total de ovos de mosquitos Eggs TP – Transporter RE – area used for storage and selection of material for recycling T 03 Pontos Estratégicos Strategical sites Pontos estratégicos Strategical sites ME – Mechanics P 25 T 01 P 21 P 23 P26 P 24 P 22 P 20 P 18 T 10 T 08 T 06 T 04 T 02 H 36 H 34 H 32 H 30 0 P 19 P 17 0 H 28 V a lo r e s d e p p25esp<vobs Macho e Fêmea de Aedes aegypti Valor de p - Inverno 2007 Valor de p - Inverno 2007 Larva de Aedes aegypti 1 1 0.8 p25esp<vobs 0.6 Valor de p p50esp<vobs ME 0.4 TP p25esp<vobs p50esp<vobs 0.6 RE 0.4 0.2 0.2 H 35 H 33 H 31 H 29 H 27 T 09 T 07 T 05 T 03 T 01 P 25 P 23 P 17 H36 H 34 H 32 H 30 H 28 T 10 T 08 T 06 T 04 T 02 P26 P 24 P 22 P 20 P 18 P 21 0 0 P 19 valor de p 0.8 Pontos Estratégicos Strategical sites Pontos Estratégicos Strategical sites Valor de p - Inverno 2007 Total de ovos de mosquitos ME – Mechanics 1 0.8 0.6 p25esp<vobs p50esp<vobs RE 0.4 0.2 Pontos Estratégicos Strategical sites H 35 H 33 H 31 H 29 H 27 T 09 T 07 T 05 T 03 T 01 P 25 P 23 P 21 P 19 0 P 17 RE – area used for storage and selection of material for recycling valor de p TP – Transporter Conclusion Higienópolis: Transporter Tubiacanga: Boats factory (immatures forms – only summer) Palmares: Area used for storage and selection of material for recycling Thanks!!!!!! 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