Bio-ecological study of Aedes aegypti in urban ecosystems in Merida state, Venezuela 1996-1998
In order to evaluate certain bio-ecological aspects of Aedes aegypti in the urban ecosystem in Merida State, adults of the species were captured and larva counts were made in 30% the housing units in localities of this region. It was found that positive larva deposits were greater inside housing uni...
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Universidad del Zulia,Facultad de Medicina,Departamento de Enfermedades Infecciosas y Tropicales
2003
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ftdoajarticles:oai:doaj.org/article:a721a4813ace495a886d63b8d0d0d3fc 2023-10-01T03:54:22+02:00 Bio-ecological study of Aedes aegypti in urban ecosystems in Merida state, Venezuela 1996-1998 Janeth Rojas Urdaneta Lázaro A Soca D Milena Mazzarri P Mayia Sojo M Abel Poleo R 2003-06-01T00:00:00Z https://doaj.org/article/a721a4813ace495a886d63b8d0d0d3fc EN ES eng spa Universidad del Zulia,Facultad de Medicina,Departamento de Enfermedades Infecciosas y Tropicales https://produccioncientificaluz.org/index.php/kasmera/article/view/4703 https://doaj.org/toc/0075-5222 https://doaj.org/toc/2477-9628 0075-5222 2477-9628 https://doaj.org/article/a721a4813ace495a886d63b8d0d0d3fc Kasmera, Vol 31, Iss 1, Pp 7-19 (2003) Aedes aegypti control de vectores dengue ecología lucha contra el dengue mosquitos vectores Arctic medicine. Tropical medicine RC955-962 Public aspects of medicine RA1-1270 article 2003 ftdoajarticles 2023-09-03T00:45:54Z In order to evaluate certain bio-ecological aspects of Aedes aegypti in the urban ecosystem in Merida State, adults of the species were captured and larva counts were made in 30% the housing units in localities of this region. It was found that positive larva deposits were greater inside housing units than outside, and this occurred both in the rainy season and the dry season, with no statistical difference between periods (X2=0.57, p< 0.05) during the three years studied. Selectivity of Aedes aegypti in relation to type of deposit area according to the larva sample was highest in old tires, followed by water tanks and water deposits, and in third place flower pots, vases, junk piles, and sheet metal containers. The capture of adults with human bait both inside and outside housing units revealed higher levels of insect (mosquito) bites in the afternoon and inside housing units, with an average of 27.2 insect bites per man hour between 7 and 8PM followed by 15.3 insect bites per man hour between 6 and 7 PM. Insect collection while insects were at rest was preferable in order to detect the presence of Aedes aegypti than capture on humans which demonstrated that insect larva counts are not the most precise indicators of insect density. Larva counts recovered relatively quickly due to the existence of stored water in zones where there are water supply difficulties and deficient water health maintenance, both of which are key factors in the epidemic occurrence of dengue in the State over the years studied. It was also found that this disease has not suffered changes in its behavior, and remains in the same areas and in the same types of water deposits even after the strong selective pressure exerted by the use of chemical insecticides applied in this region of the country. Article in Journal/Newspaper Arctic Directory of Open Access Journals: DOAJ Articles Arctic |
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Aedes aegypti control de vectores dengue ecología lucha contra el dengue mosquitos vectores Arctic medicine. Tropical medicine RC955-962 Public aspects of medicine RA1-1270 |
spellingShingle |
Aedes aegypti control de vectores dengue ecología lucha contra el dengue mosquitos vectores Arctic medicine. Tropical medicine RC955-962 Public aspects of medicine RA1-1270 Janeth Rojas Urdaneta Lázaro A Soca D Milena Mazzarri P Mayia Sojo M Abel Poleo R Bio-ecological study of Aedes aegypti in urban ecosystems in Merida state, Venezuela 1996-1998 |
topic_facet |
Aedes aegypti control de vectores dengue ecología lucha contra el dengue mosquitos vectores Arctic medicine. Tropical medicine RC955-962 Public aspects of medicine RA1-1270 |
description |
In order to evaluate certain bio-ecological aspects of Aedes aegypti in the urban ecosystem in Merida State, adults of the species were captured and larva counts were made in 30% the housing units in localities of this region. It was found that positive larva deposits were greater inside housing units than outside, and this occurred both in the rainy season and the dry season, with no statistical difference between periods (X2=0.57, p< 0.05) during the three years studied. Selectivity of Aedes aegypti in relation to type of deposit area according to the larva sample was highest in old tires, followed by water tanks and water deposits, and in third place flower pots, vases, junk piles, and sheet metal containers. The capture of adults with human bait both inside and outside housing units revealed higher levels of insect (mosquito) bites in the afternoon and inside housing units, with an average of 27.2 insect bites per man hour between 7 and 8PM followed by 15.3 insect bites per man hour between 6 and 7 PM. Insect collection while insects were at rest was preferable in order to detect the presence of Aedes aegypti than capture on humans which demonstrated that insect larva counts are not the most precise indicators of insect density. Larva counts recovered relatively quickly due to the existence of stored water in zones where there are water supply difficulties and deficient water health maintenance, both of which are key factors in the epidemic occurrence of dengue in the State over the years studied. It was also found that this disease has not suffered changes in its behavior, and remains in the same areas and in the same types of water deposits even after the strong selective pressure exerted by the use of chemical insecticides applied in this region of the country. |
format |
Article in Journal/Newspaper |
author |
Janeth Rojas Urdaneta Lázaro A Soca D Milena Mazzarri P Mayia Sojo M Abel Poleo R |
author_facet |
Janeth Rojas Urdaneta Lázaro A Soca D Milena Mazzarri P Mayia Sojo M Abel Poleo R |
author_sort |
Janeth Rojas Urdaneta |
title |
Bio-ecological study of Aedes aegypti in urban ecosystems in Merida state, Venezuela 1996-1998 |
title_short |
Bio-ecological study of Aedes aegypti in urban ecosystems in Merida state, Venezuela 1996-1998 |
title_full |
Bio-ecological study of Aedes aegypti in urban ecosystems in Merida state, Venezuela 1996-1998 |
title_fullStr |
Bio-ecological study of Aedes aegypti in urban ecosystems in Merida state, Venezuela 1996-1998 |
title_full_unstemmed |
Bio-ecological study of Aedes aegypti in urban ecosystems in Merida state, Venezuela 1996-1998 |
title_sort |
bio-ecological study of aedes aegypti in urban ecosystems in merida state, venezuela 1996-1998 |
publisher |
Universidad del Zulia,Facultad de Medicina,Departamento de Enfermedades Infecciosas y Tropicales |
publishDate |
2003 |
url |
https://doaj.org/article/a721a4813ace495a886d63b8d0d0d3fc |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Kasmera, Vol 31, Iss 1, Pp 7-19 (2003) |
op_relation |
https://produccioncientificaluz.org/index.php/kasmera/article/view/4703 https://doaj.org/toc/0075-5222 https://doaj.org/toc/2477-9628 0075-5222 2477-9628 https://doaj.org/article/a721a4813ace495a886d63b8d0d0d3fc |
_version_ |
1778521899219812352 |