Seasonal pattern of abundance of Aedes aegypti (Diptera: Culicidae) in Buenos Aires city, Argentina
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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Instituto Oswaldo Cruz, Ministério da Saúde
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ftdoajarticles:oai:doaj.org/article:47cf3608054e48129506b9171cd93134 2023-05-15T15:12:01+02:00 Seasonal pattern of abundance of Aedes aegypti (Diptera: Culicidae) in Buenos Aires city, Argentina Darío Vezzani Stella Maris Velázquez Nicolás Schweigmann 2004-06-01T00:00:00Z https://doi.org/10.1590/S0074-02762004000400002 https://doaj.org/article/47cf3608054e48129506b9171cd93134 EN eng Instituto Oswaldo Cruz, Ministério da Saúde http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0074-02762004000400002 https://doaj.org/toc/0074-0276 https://doaj.org/toc/1678-8060 doi:10.1590/S0074-02762004000400002 0074-0276 1678-8060 https://doaj.org/article/47cf3608054e48129506b9171cd93134 Memórias do Instituto Oswaldo Cruz., Vol 99, Iss 4, Pp 351-356 (2004) Aedes aegypti abundance pattern ovitraps breeding sites Buenos Aires Arctic medicine. Tropical medicine RC955-962 Microbiology QR1-502 article 2004 ftdoajarticles https://doi.org/10.1590/S0074-02762004000400002 2023-01-08T01:36:56Z 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 20ºC and accumulated rainfalls above 150 mm. A sharp decline in oviposition activity was observed when monthly mean temperature decreased to 16.5ºC, and no eggs were found below 14.8ºC. 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. Article in Journal/Newspaper Arctic Directory of Open Access Journals: DOAJ Articles Arctic Argentina Memórias do Instituto Oswaldo Cruz 99 4 351 356 |
institution |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Aedes aegypti abundance pattern ovitraps breeding sites Buenos Aires Arctic medicine. Tropical medicine RC955-962 Microbiology QR1-502 |
spellingShingle |
Aedes aegypti abundance pattern ovitraps breeding sites Buenos Aires Arctic medicine. Tropical medicine RC955-962 Microbiology QR1-502 Darío Vezzani Stella Maris Velázquez Nicolás Schweigmann Seasonal pattern of abundance of Aedes aegypti (Diptera: Culicidae) in Buenos Aires city, Argentina |
topic_facet |
Aedes aegypti abundance pattern ovitraps breeding sites Buenos Aires Arctic medicine. Tropical medicine RC955-962 Microbiology QR1-502 |
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 20ºC and accumulated rainfalls above 150 mm. A sharp decline in oviposition activity was observed when monthly mean temperature decreased to 16.5ºC, and no eggs were found below 14.8ºC. 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 |
Article in Journal/Newspaper |
author |
Darío Vezzani Stella Maris Velázquez Nicolás Schweigmann |
author_facet |
Darío Vezzani Stella Maris Velázquez Nicolás Schweigmann |
author_sort |
Darío Vezzani |
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 |
publisher |
Instituto Oswaldo Cruz, Ministério da Saúde |
publishDate |
2004 |
url |
https://doi.org/10.1590/S0074-02762004000400002 https://doaj.org/article/47cf3608054e48129506b9171cd93134 |
geographic |
Arctic Argentina |
geographic_facet |
Arctic Argentina |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Memórias do Instituto Oswaldo Cruz., Vol 99, Iss 4, Pp 351-356 (2004) |
op_relation |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0074-02762004000400002 https://doaj.org/toc/0074-0276 https://doaj.org/toc/1678-8060 doi:10.1590/S0074-02762004000400002 0074-0276 1678-8060 https://doaj.org/article/47cf3608054e48129506b9171cd93134 |
op_doi |
https://doi.org/10.1590/S0074-02762004000400002 |
container_title |
Memórias do Instituto Oswaldo Cruz |
container_volume |
99 |
container_issue |
4 |
container_start_page |
351 |
op_container_end_page |
356 |
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1766342774842458112 |