Seasonal pattern of abundance of Aedes aegypti (Diptera: Culicidae) in Buenos Aires City, Argentina

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In Buenos Aires, the most crowded city of Argentina, there is a potential risk of dengue virus transmission by the mosquito Aedes aegypti during late summer. The temporal patterns of oviposition activity and abundance of breeding sites of this vector were studied in two cemeteries of the city. Betwe...

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Autores principales: Vezzani, D., Velázquez, S.M., Schweigmann, N.
Formato: Artículo publishedVersion
Lenguaje:Inglés
Publicado: 2004
Materias:
Abundance pattern
Aedes aegypti
Breeding sites
Buenos Aires
Ovitraps
article
controlled study
disease activity
disease transmission
methodology
mosquito
nonhuman
risk assessment
summer
temperature
virus transmission
winter
Culicidae
Dengue virus
Diptera
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00740276_v99_n4_p351_Vezzani
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling paperaa:paper_00740276_v99_n4_p351_Vezzani2023-06-12T16:45:52Z Seasonal pattern of abundance of Aedes aegypti (Diptera: Culicidae) in Buenos Aires City, Argentina Mem. Inst. Oswaldo Cruz 2004;99(4):351-356 Vezzani, D. Velázquez, S.M. Schweigmann, N. Abundance pattern Aedes aegypti Breeding sites Buenos Aires Ovitraps Aedes aegypti article controlled study disease activity disease transmission methodology mosquito nonhuman risk assessment summer temperature virus transmission winter Aedes aegypti Culicidae Dengue virus Diptera In Buenos Aires, the most crowded city of Argentina, there is a potential risk of dengue virus transmission by the mosquito Aedes aegypti during late summer. The temporal patterns of oviposition activity and abundance of breeding sites of this vector were studied in two cemeteries of the city. Between September 1998 and August 1999, we examined 142 ovitraps weekly and a total of 18,010 water-filled containers. Both study areas showed remarkable differences in the percentages of positive ovitraps (19% vs 8%) and breeding sites (18% vs 1%), but similar temporal abundance patterns. The percentage of breeding sites was higher in summer and autumn than in spring and winter, and the percentage of positive ovitraps was higher in summer than in the other three seasons. Immatures were recorded from the first week of October to the second week of July, and oviposition activity from the third week of October until the end of April. In both cemeteries and with both methodologies the highest infestation levels were registered in March (ovitraps: 41.8% and 20.6%, breeding sites : 39.2% and 3.4%). These highest abundances took place after several months with mean temperatures above 20°C and accumulated rainfalls above 150 mm. A sharp decline in oviposition activity was observed when monthly mean temperature decreased to 16.5°C, and no eggs were found below 14.8°C. Seasonal fluctuation of Ae. aegypti abundances in mid-latitudes like Buenos Aires would allow reduction of the egg mosquito population through the elimination of containers during the coldest months, which are free of adults. Fil:Vezzani, D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Schweigmann, N. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2004 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion application/pdf eng info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00740276_v99_n4_p351_Vezzani
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
language Inglés
orig_language_str_mv eng
topic Abundance pattern
Aedes aegypti
Breeding sites
Buenos Aires
Ovitraps
Aedes aegypti
article
controlled study
disease activity
disease transmission
methodology
mosquito
nonhuman
risk assessment
summer
temperature
virus transmission
winter
Aedes aegypti
Culicidae
Dengue virus
Diptera
spellingShingle Abundance pattern
Aedes aegypti
Breeding sites
Buenos Aires
Ovitraps
Aedes aegypti
article
controlled study
disease activity
disease transmission
methodology
mosquito
nonhuman
risk assessment
summer
temperature
virus transmission
winter
Aedes aegypti
Culicidae
Dengue virus
Diptera
Vezzani, D.
Velázquez, S.M.
Schweigmann, N.
Seasonal pattern of abundance of Aedes aegypti (Diptera: Culicidae) in Buenos Aires City, Argentina
topic_facet Abundance pattern
Aedes aegypti
Breeding sites
Buenos Aires
Ovitraps
Aedes aegypti
article
controlled study
disease activity
disease transmission
methodology
mosquito
nonhuman
risk assessment
summer
temperature
virus transmission
winter
Aedes aegypti
Culicidae
Dengue virus
Diptera
description In Buenos Aires, the most crowded city of Argentina, there is a potential risk of dengue virus transmission by the mosquito Aedes aegypti during late summer. The temporal patterns of oviposition activity and abundance of breeding sites of this vector were studied in two cemeteries of the city. Between September 1998 and August 1999, we examined 142 ovitraps weekly and a total of 18,010 water-filled containers. Both study areas showed remarkable differences in the percentages of positive ovitraps (19% vs 8%) and breeding sites (18% vs 1%), but similar temporal abundance patterns. The percentage of breeding sites was higher in summer and autumn than in spring and winter, and the percentage of positive ovitraps was higher in summer than in the other three seasons. Immatures were recorded from the first week of October to the second week of July, and oviposition activity from the third week of October until the end of April. In both cemeteries and with both methodologies the highest infestation levels were registered in March (ovitraps: 41.8% and 20.6%, breeding sites : 39.2% and 3.4%). These highest abundances took place after several months with mean temperatures above 20°C and accumulated rainfalls above 150 mm. A sharp decline in oviposition activity was observed when monthly mean temperature decreased to 16.5°C, and no eggs were found below 14.8°C. Seasonal fluctuation of Ae. aegypti abundances in mid-latitudes like Buenos Aires would allow reduction of the egg mosquito population through the elimination of containers during the coldest months, which are free of adults.
format Artículo
Artículo
publishedVersion
author Vezzani, D.
Velázquez, S.M.
Schweigmann, N.
author_facet Vezzani, D.
Velázquez, S.M.
Schweigmann, N.
author_sort Vezzani, D.
title Seasonal pattern of abundance of Aedes aegypti (Diptera: Culicidae) in Buenos Aires City, Argentina
title_short Seasonal pattern of abundance of Aedes aegypti (Diptera: Culicidae) in Buenos Aires City, Argentina
title_full Seasonal pattern of abundance of Aedes aegypti (Diptera: Culicidae) in Buenos Aires City, Argentina
title_fullStr Seasonal pattern of abundance of Aedes aegypti (Diptera: Culicidae) in Buenos Aires City, Argentina
title_full_unstemmed Seasonal pattern of abundance of Aedes aegypti (Diptera: Culicidae) in Buenos Aires City, Argentina
title_sort seasonal pattern of abundance of aedes aegypti (diptera: culicidae) in buenos aires city, argentina
publishDate 2004
url http://hdl.handle.net/20.500.12110/paper_00740276_v99_n4_p351_Vezzani
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AT schweigmannn seasonalpatternofabundanceofaedesaegyptidipteraculicidaeinbuenosairescityargentina
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