Comparison Between Larval Survey Index and Positive Ovitrap Index in the Evaluation of Populations of () (Linnaeus, 1762) North of Paraná, Brazil

Aedes ( Stegomyia ) aegypti (Linnaeus, 1762) is one of the world’s most widely distributed mosquitoes and is the vector of the dengue virus, one of the most important reemerging diseases. Besides dengue, A. aegypti can also transmit urban yellow fever, chikungunya, and Zika virus, making it of great...

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Main Authors: Kauani Larissa Campana Nascimento, João Fernando Marques da Silva, João Antonio Cyrino Zequi, José Lopes
Format: Article
Language:English
Published: SAGE Publishing 2020-01-01
Series:Environmental Health Insights
Online Access:https://doi.org/10.1177/1178630219886570
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spelling doaj-fe78cf2d1b5446cc864389d3f004a60d2020-11-25T03:46:31ZengSAGE PublishingEnvironmental Health Insights1178-63022020-01-011410.1177/1178630219886570Comparison Between Larval Survey Index and Positive Ovitrap Index in the Evaluation of Populations of () (Linnaeus, 1762) North of Paraná, BrazilKauani Larissa Campana Nascimento0João Fernando Marques da Silva1João Antonio Cyrino Zequi2José Lopes3Programa de Pós-graduação em Ciências Biológicas, Departamento de Biologia Animal e Vegetal, Centro de Ciências Biológicas, Universidade Estadual de Londrina, Londrina, BrazilDepartamento de Biologia Animal e Vegetal, Centro de Ciências Biológicas, Universidade Estadual de Londrina, Londrina, BrazilDepartamento de Biologia Animal e Vegetal, Centro de Ciências Biológicas, Universidade Estadual de Londrina, Londrina, BrazilDepartamento de Biologia Animal e Vegetal, Centro de Ciências Biológicas, Universidade Estadual de Londrina, Londrina, BrazilAedes ( Stegomyia ) aegypti (Linnaeus, 1762) is one of the world’s most widely distributed mosquitoes and is the vector of the dengue virus, one of the most important reemerging diseases. Besides dengue, A. aegypti can also transmit urban yellow fever, chikungunya, and Zika virus, making it of great medical importance. Thus, it is of extreme importance to find reliable methods to evaluate the presence of A. aegypti in urban areas. In Brazil, rapid index surveys of Aedes aegypti by means of larval survey (LIRAa) is the official method to estimate the Breteau (BI) and property infestation (PII) indexes, which indicates how many infested containers with larvae of A. aegypti were found by the total number of properties surveyed and the proportion of houses infested, respectively. As the LIRAa requires access to private residences and trained personal to find breeding sites and do not reveal the mosquito’s presence when in low density, it has not demonstrated efficacy in determining the presence of A. aegypti . To evaluate an alternative method, the LIRAa method was compared with an oviposition trap, made with hay infusion and a hardboard pallet, to evaluate the BI and the PII. The 2 methods were carried out simultaneously through 4 surveys, sampling 60 homes per survey. To evaluate the best configuration of ovitraps for surveillance of A. aegypti , the ovitraps were installed in intradomicile and peridomicile areas, with 1 to 5 traps per residence and with 1 to 3 pallets per trap, and these different configurations were compared using the positive ovitrap index (POI) and egg density index (EDI). The ovitraps showed greater sensitivity for detecting the presence of A. aegypti , with a BI of 72.5% and PII of 54.2%, whereas the LIRAa revealed only 2.1% for the BI and 1.3% for the PII. Therefore, the use of sentinel traps can provide information in a more rapid and precise manner. As there were no differences in the ovitraps distributions patterns, the ovitraps can be installed in the peridomicile area, with 2 traps per surveillance point and 1 pallet per trap, making their installation easier and more cost-efficient, facilitating the work of health agents in future surveillances complementing LIRAa’s actions for efficient monitoring.https://doi.org/10.1177/1178630219886570
collection DOAJ
language English
format Article
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author Kauani Larissa Campana Nascimento
João Fernando Marques da Silva
João Antonio Cyrino Zequi
José Lopes
spellingShingle Kauani Larissa Campana Nascimento
João Fernando Marques da Silva
João Antonio Cyrino Zequi
José Lopes
Comparison Between Larval Survey Index and Positive Ovitrap Index in the Evaluation of Populations of () (Linnaeus, 1762) North of Paraná, Brazil
Environmental Health Insights
author_facet Kauani Larissa Campana Nascimento
João Fernando Marques da Silva
João Antonio Cyrino Zequi
José Lopes
author_sort Kauani Larissa Campana Nascimento
title Comparison Between Larval Survey Index and Positive Ovitrap Index in the Evaluation of Populations of () (Linnaeus, 1762) North of Paraná, Brazil
title_short Comparison Between Larval Survey Index and Positive Ovitrap Index in the Evaluation of Populations of () (Linnaeus, 1762) North of Paraná, Brazil
title_full Comparison Between Larval Survey Index and Positive Ovitrap Index in the Evaluation of Populations of () (Linnaeus, 1762) North of Paraná, Brazil
title_fullStr Comparison Between Larval Survey Index and Positive Ovitrap Index in the Evaluation of Populations of () (Linnaeus, 1762) North of Paraná, Brazil
title_full_unstemmed Comparison Between Larval Survey Index and Positive Ovitrap Index in the Evaluation of Populations of () (Linnaeus, 1762) North of Paraná, Brazil
title_sort comparison between larval survey index and positive ovitrap index in the evaluation of populations of () (linnaeus, 1762) north of paraná, brazil
publisher SAGE Publishing
series Environmental Health Insights
issn 1178-6302
publishDate 2020-01-01
description Aedes ( Stegomyia ) aegypti (Linnaeus, 1762) is one of the world’s most widely distributed mosquitoes and is the vector of the dengue virus, one of the most important reemerging diseases. Besides dengue, A. aegypti can also transmit urban yellow fever, chikungunya, and Zika virus, making it of great medical importance. Thus, it is of extreme importance to find reliable methods to evaluate the presence of A. aegypti in urban areas. In Brazil, rapid index surveys of Aedes aegypti by means of larval survey (LIRAa) is the official method to estimate the Breteau (BI) and property infestation (PII) indexes, which indicates how many infested containers with larvae of A. aegypti were found by the total number of properties surveyed and the proportion of houses infested, respectively. As the LIRAa requires access to private residences and trained personal to find breeding sites and do not reveal the mosquito’s presence when in low density, it has not demonstrated efficacy in determining the presence of A. aegypti . To evaluate an alternative method, the LIRAa method was compared with an oviposition trap, made with hay infusion and a hardboard pallet, to evaluate the BI and the PII. The 2 methods were carried out simultaneously through 4 surveys, sampling 60 homes per survey. To evaluate the best configuration of ovitraps for surveillance of A. aegypti , the ovitraps were installed in intradomicile and peridomicile areas, with 1 to 5 traps per residence and with 1 to 3 pallets per trap, and these different configurations were compared using the positive ovitrap index (POI) and egg density index (EDI). The ovitraps showed greater sensitivity for detecting the presence of A. aegypti , with a BI of 72.5% and PII of 54.2%, whereas the LIRAa revealed only 2.1% for the BI and 1.3% for the PII. Therefore, the use of sentinel traps can provide information in a more rapid and precise manner. As there were no differences in the ovitraps distributions patterns, the ovitraps can be installed in the peridomicile area, with 2 traps per surveillance point and 1 pallet per trap, making their installation easier and more cost-efficient, facilitating the work of health agents in future surveillances complementing LIRAa’s actions for efficient monitoring.
url https://doi.org/10.1177/1178630219886570
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