A semi-field evaluation in Thailand of the use of human landing catches (HLC) versus human-baited double net trap (HDN) for assessing the impact of a volatile pyrethroid spatial repellent and pyrethroid-treated clothing on Anopheles minimus landing
Abstract Background The mosquito landing rate measured by human landing catches (HLC) is the conventional endpoint used to evaluate the impact of vector control interventions on human-vector exposure. Non-exposure based alternatives to the HLC are desirable to minimize the risk of accidental mosquit...
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ftdoajarticles:oai:doaj.org/article:b1bef606ea62497d92a0d2a9b049e3b3 2023-07-30T04:02:13+02:00 A semi-field evaluation in Thailand of the use of human landing catches (HLC) versus human-baited double net trap (HDN) for assessing the impact of a volatile pyrethroid spatial repellent and pyrethroid-treated clothing on Anopheles minimus landing Élodie A. Vajda Manop Saeung Amanda Ross David J. McIver Allison Tatarsky Sarah J. Moore Neil F. Lobo Theeraphap Chareonviriyaphap 2023-07-01T00:00:00Z https://doi.org/10.1186/s12936-023-04619-x https://doaj.org/article/b1bef606ea62497d92a0d2a9b049e3b3 EN eng BMC https://doi.org/10.1186/s12936-023-04619-x https://doaj.org/toc/1475-2875 doi:10.1186/s12936-023-04619-x 1475-2875 https://doaj.org/article/b1bef606ea62497d92a0d2a9b049e3b3 Malaria Journal, Vol 22, Iss 1, Pp 1-10 (2023) Human landing catches Human-baited double net trap Trap evaluation Semi-field system Bite prevention interventions Anopheles minimus Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 article 2023 ftdoajarticles https://doi.org/10.1186/s12936-023-04619-x 2023-07-16T00:38:41Z Abstract Background The mosquito landing rate measured by human landing catches (HLC) is the conventional endpoint used to evaluate the impact of vector control interventions on human-vector exposure. Non-exposure based alternatives to the HLC are desirable to minimize the risk of accidental mosquito bites. One such alternative is the human-baited double net trap (HDN), but the estimated personal protection of interventions using the HDN has not been compared to the efficacy estimated using HLC. This semi-field study in Sai Yok District, Kanchanaburi Province, Thailand, evaluates the performance of the HLC and the HDN for estimating the effect on Anopheles minimus landing rates of two intervention types characterized by contrasting modes of action, a volatile pyrethroid spatial repellent (VSPR) and insecticide-treated clothing (ITC). Methods Two experiments to evaluate the protective efficacy of (1) a VPSR and (2) ITC, were performed. A block randomized cross-over design over 32 nights was carried out with both the HLC or HDN. Eight replicates per combination of collection method and intervention or control arm were conducted. For each replicate, 100 An. minimus were released and were collected for 6 h. The odds ratio (OR) of the released An. minimus mosquitoes landing in the intervention compared to the control arm was estimated using logistic regression, including collection method, treatment, and experimental day as fixed effects. Results For the VPSR, the protective efficacy was similar for the two methods: 99.3%, 95% CI (99.5–99.0) when measured by HLC, and 100% (100, Inf) when measured by HDN where no mosquitoes were caught (interaction test p = 0.99). For the ITC, the protective efficacy was 70% (60–77%) measured by HLC but there was no evidence of protection when measured by HDN [4% increase (15–27%)] (interaction test p < 0.001). Conclusions Interactions between mosquitoes, bite prevention tools and the sampling method may impact the estimated intervention protective efficacy. Consequently, the ... Article in Journal/Newspaper Arctic Directory of Open Access Journals: DOAJ Articles Arctic Malaria Journal 22 1 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Human landing catches Human-baited double net trap Trap evaluation Semi-field system Bite prevention interventions Anopheles minimus Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 |
spellingShingle |
Human landing catches Human-baited double net trap Trap evaluation Semi-field system Bite prevention interventions Anopheles minimus Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 Élodie A. Vajda Manop Saeung Amanda Ross David J. McIver Allison Tatarsky Sarah J. Moore Neil F. Lobo Theeraphap Chareonviriyaphap A semi-field evaluation in Thailand of the use of human landing catches (HLC) versus human-baited double net trap (HDN) for assessing the impact of a volatile pyrethroid spatial repellent and pyrethroid-treated clothing on Anopheles minimus landing |
topic_facet |
Human landing catches Human-baited double net trap Trap evaluation Semi-field system Bite prevention interventions Anopheles minimus Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 |
description |
Abstract Background The mosquito landing rate measured by human landing catches (HLC) is the conventional endpoint used to evaluate the impact of vector control interventions on human-vector exposure. Non-exposure based alternatives to the HLC are desirable to minimize the risk of accidental mosquito bites. One such alternative is the human-baited double net trap (HDN), but the estimated personal protection of interventions using the HDN has not been compared to the efficacy estimated using HLC. This semi-field study in Sai Yok District, Kanchanaburi Province, Thailand, evaluates the performance of the HLC and the HDN for estimating the effect on Anopheles minimus landing rates of two intervention types characterized by contrasting modes of action, a volatile pyrethroid spatial repellent (VSPR) and insecticide-treated clothing (ITC). Methods Two experiments to evaluate the protective efficacy of (1) a VPSR and (2) ITC, were performed. A block randomized cross-over design over 32 nights was carried out with both the HLC or HDN. Eight replicates per combination of collection method and intervention or control arm were conducted. For each replicate, 100 An. minimus were released and were collected for 6 h. The odds ratio (OR) of the released An. minimus mosquitoes landing in the intervention compared to the control arm was estimated using logistic regression, including collection method, treatment, and experimental day as fixed effects. Results For the VPSR, the protective efficacy was similar for the two methods: 99.3%, 95% CI (99.5–99.0) when measured by HLC, and 100% (100, Inf) when measured by HDN where no mosquitoes were caught (interaction test p = 0.99). For the ITC, the protective efficacy was 70% (60–77%) measured by HLC but there was no evidence of protection when measured by HDN [4% increase (15–27%)] (interaction test p < 0.001). Conclusions Interactions between mosquitoes, bite prevention tools and the sampling method may impact the estimated intervention protective efficacy. Consequently, the ... |
format |
Article in Journal/Newspaper |
author |
Élodie A. Vajda Manop Saeung Amanda Ross David J. McIver Allison Tatarsky Sarah J. Moore Neil F. Lobo Theeraphap Chareonviriyaphap |
author_facet |
Élodie A. Vajda Manop Saeung Amanda Ross David J. McIver Allison Tatarsky Sarah J. Moore Neil F. Lobo Theeraphap Chareonviriyaphap |
author_sort |
Élodie A. Vajda |
title |
A semi-field evaluation in Thailand of the use of human landing catches (HLC) versus human-baited double net trap (HDN) for assessing the impact of a volatile pyrethroid spatial repellent and pyrethroid-treated clothing on Anopheles minimus landing |
title_short |
A semi-field evaluation in Thailand of the use of human landing catches (HLC) versus human-baited double net trap (HDN) for assessing the impact of a volatile pyrethroid spatial repellent and pyrethroid-treated clothing on Anopheles minimus landing |
title_full |
A semi-field evaluation in Thailand of the use of human landing catches (HLC) versus human-baited double net trap (HDN) for assessing the impact of a volatile pyrethroid spatial repellent and pyrethroid-treated clothing on Anopheles minimus landing |
title_fullStr |
A semi-field evaluation in Thailand of the use of human landing catches (HLC) versus human-baited double net trap (HDN) for assessing the impact of a volatile pyrethroid spatial repellent and pyrethroid-treated clothing on Anopheles minimus landing |
title_full_unstemmed |
A semi-field evaluation in Thailand of the use of human landing catches (HLC) versus human-baited double net trap (HDN) for assessing the impact of a volatile pyrethroid spatial repellent and pyrethroid-treated clothing on Anopheles minimus landing |
title_sort |
semi-field evaluation in thailand of the use of human landing catches (hlc) versus human-baited double net trap (hdn) for assessing the impact of a volatile pyrethroid spatial repellent and pyrethroid-treated clothing on anopheles minimus landing |
publisher |
BMC |
publishDate |
2023 |
url |
https://doi.org/10.1186/s12936-023-04619-x https://doaj.org/article/b1bef606ea62497d92a0d2a9b049e3b3 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Malaria Journal, Vol 22, Iss 1, Pp 1-10 (2023) |
op_relation |
https://doi.org/10.1186/s12936-023-04619-x https://doaj.org/toc/1475-2875 doi:10.1186/s12936-023-04619-x 1475-2875 https://doaj.org/article/b1bef606ea62497d92a0d2a9b049e3b3 |
op_doi |
https://doi.org/10.1186/s12936-023-04619-x |
container_title |
Malaria Journal |
container_volume |
22 |
container_issue |
1 |
_version_ |
1772812941134921728 |