Larval control of Anopheles (Nyssorhinchus) darlingi using granular formulation of Bacillus sphaericus in abandoned gold-miners excavation pools in the Brazilian Amazon Rainforest
INTRODUCTION: Use of a Bacillus sphaericus based mosquito larvicide was evaluated as an intervention for malaria vector control at a mining site in Amapá, Brazil. Impacts on larval and adult densities of the primary vector Anopheles darlingi were measured over the course of a 52 week study period. M...
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ftdoajarticles:oai:doaj.org/article:25bd4143798d432d8c934de7dfe534b0 2023-05-15T15:10:37+02:00 Larval control of Anopheles (Nyssorhinchus) darlingi using granular formulation of Bacillus sphaericus in abandoned gold-miners excavation pools in the Brazilian Amazon Rainforest Allan Kardec Ribeiro Galardo Robert Zimmerman Clícia Denis Galardo 2013-04-01T00:00:00Z https://doi.org/10.1590/0037-8682-1649-2013 https://doaj.org/article/25bd4143798d432d8c934de7dfe534b0 EN eng Sociedade Brasileira de Medicina Tropical (SBMT) http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0037-86822013000200172&lng=en&tlng=en https://doaj.org/toc/1678-9849 1678-9849 doi:10.1590/0037-8682-1649-2013 https://doaj.org/article/25bd4143798d432d8c934de7dfe534b0 Revista da Sociedade Brasileira de Medicina Tropical, Vol 46, Iss 2, Pp 172-177 (2013) Anopheles darlingi Bacillus sphaericus Gold-miners Malaria Arctic medicine. Tropical medicine RC955-962 article 2013 ftdoajarticles https://doi.org/10.1590/0037-8682-1649-2013 2022-12-31T02:52:53Z INTRODUCTION: Use of a Bacillus sphaericus based mosquito larvicide was evaluated as an intervention for malaria vector control at a mining site in Amapá, Brazil. Impacts on larval and adult densities of the primary vector Anopheles darlingi were measured over the course of a 52 week study period. METHODS: In Calçoene, State of Amapá, gold mining activity occurs in 19 mining sites in gold-miners of Lourenço. Large pools are formed in mining sites and naturally colonized by Anopheles darlingi. During one year, the impact of applications of VectoLex(r) CG to these larval sources was evaluated. Applications of 20kg/ha were made as needed, based on 10 immature (3rd, 4th instars and pupae) surveillance of health and established thresholds. RESULTS: One hundred percent initial control was observed 48h after each treatment. The pools received from 2-10 (5.3±1.6) treatments during the year. The average re-treatment interval in productive pools was 9.4±4.3 weeks. During weeks 3-52 of the study, mean density of late stage larvae was 78% and pupae were 93% lower in the treated pools than in untreated pools (p< 0.0001, n=51) while reduction of adult mosquitoes was 53% in comparison to the untreated area during the last five months of the study, which were the rainy season (p<0.001). CONCLUSIONS: VectoLex(r) CG reduced immature Anopheles darlingi infestation levels during the entire study period, and reduced adult mosquito populations during the rainy season. Article in Journal/Newspaper Arctic Directory of Open Access Journals: DOAJ Articles Arctic Revista da Sociedade Brasileira de Medicina Tropical 46 2 172 177 |
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op_collection_id |
ftdoajarticles |
language |
English |
topic |
Anopheles darlingi Bacillus sphaericus Gold-miners Malaria Arctic medicine. Tropical medicine RC955-962 |
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Anopheles darlingi Bacillus sphaericus Gold-miners Malaria Arctic medicine. Tropical medicine RC955-962 Allan Kardec Ribeiro Galardo Robert Zimmerman Clícia Denis Galardo Larval control of Anopheles (Nyssorhinchus) darlingi using granular formulation of Bacillus sphaericus in abandoned gold-miners excavation pools in the Brazilian Amazon Rainforest |
topic_facet |
Anopheles darlingi Bacillus sphaericus Gold-miners Malaria Arctic medicine. Tropical medicine RC955-962 |
description |
INTRODUCTION: Use of a Bacillus sphaericus based mosquito larvicide was evaluated as an intervention for malaria vector control at a mining site in Amapá, Brazil. Impacts on larval and adult densities of the primary vector Anopheles darlingi were measured over the course of a 52 week study period. METHODS: In Calçoene, State of Amapá, gold mining activity occurs in 19 mining sites in gold-miners of Lourenço. Large pools are formed in mining sites and naturally colonized by Anopheles darlingi. During one year, the impact of applications of VectoLex(r) CG to these larval sources was evaluated. Applications of 20kg/ha were made as needed, based on 10 immature (3rd, 4th instars and pupae) surveillance of health and established thresholds. RESULTS: One hundred percent initial control was observed 48h after each treatment. The pools received from 2-10 (5.3±1.6) treatments during the year. The average re-treatment interval in productive pools was 9.4±4.3 weeks. During weeks 3-52 of the study, mean density of late stage larvae was 78% and pupae were 93% lower in the treated pools than in untreated pools (p< 0.0001, n=51) while reduction of adult mosquitoes was 53% in comparison to the untreated area during the last five months of the study, which were the rainy season (p<0.001). CONCLUSIONS: VectoLex(r) CG reduced immature Anopheles darlingi infestation levels during the entire study period, and reduced adult mosquito populations during the rainy season. |
format |
Article in Journal/Newspaper |
author |
Allan Kardec Ribeiro Galardo Robert Zimmerman Clícia Denis Galardo |
author_facet |
Allan Kardec Ribeiro Galardo Robert Zimmerman Clícia Denis Galardo |
author_sort |
Allan Kardec Ribeiro Galardo |
title |
Larval control of Anopheles (Nyssorhinchus) darlingi using granular formulation of Bacillus sphaericus in abandoned gold-miners excavation pools in the Brazilian Amazon Rainforest |
title_short |
Larval control of Anopheles (Nyssorhinchus) darlingi using granular formulation of Bacillus sphaericus in abandoned gold-miners excavation pools in the Brazilian Amazon Rainforest |
title_full |
Larval control of Anopheles (Nyssorhinchus) darlingi using granular formulation of Bacillus sphaericus in abandoned gold-miners excavation pools in the Brazilian Amazon Rainforest |
title_fullStr |
Larval control of Anopheles (Nyssorhinchus) darlingi using granular formulation of Bacillus sphaericus in abandoned gold-miners excavation pools in the Brazilian Amazon Rainforest |
title_full_unstemmed |
Larval control of Anopheles (Nyssorhinchus) darlingi using granular formulation of Bacillus sphaericus in abandoned gold-miners excavation pools in the Brazilian Amazon Rainforest |
title_sort |
larval control of anopheles (nyssorhinchus) darlingi using granular formulation of bacillus sphaericus in abandoned gold-miners excavation pools in the brazilian amazon rainforest |
publisher |
Sociedade Brasileira de Medicina Tropical (SBMT) |
publishDate |
2013 |
url |
https://doi.org/10.1590/0037-8682-1649-2013 https://doaj.org/article/25bd4143798d432d8c934de7dfe534b0 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Revista da Sociedade Brasileira de Medicina Tropical, Vol 46, Iss 2, Pp 172-177 (2013) |
op_relation |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0037-86822013000200172&lng=en&tlng=en https://doaj.org/toc/1678-9849 1678-9849 doi:10.1590/0037-8682-1649-2013 https://doaj.org/article/25bd4143798d432d8c934de7dfe534b0 |
op_doi |
https://doi.org/10.1590/0037-8682-1649-2013 |
container_title |
Revista da Sociedade Brasileira de Medicina Tropical |
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46 |
container_issue |
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172 |
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177 |
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