Malaria transmission and vector behaviour in a forested malaria focus in central Vietnam and the implications for vector control
Abstract Background In Vietnam, malaria is becoming progressively restricted to specific foci where human and vector characteristics alter the known malaria epidemiology, urging for alternative or adapted control strategies. Long-lasting insecticidal hammocks (LLIH) were designed and introduced in N...
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ftdoajarticles:oai:doaj.org/article:f352dd2f6680475e9b848217fd29f8ee 2023-05-15T15:16:18+02:00 Malaria transmission and vector behaviour in a forested malaria focus in central Vietnam and the implications for vector control Speybroeck Niko Denis Leen Roelants Patricia Luu Nguyen Van Chut Nguyen Van Ham Nguyen Hoi Le Trung Ho Van Bortel Wim D'Alessandro Umberto Coosemans Marc 2010-12-01T00:00:00Z https://doi.org/10.1186/1475-2875-9-373 https://doaj.org/article/f352dd2f6680475e9b848217fd29f8ee EN eng BMC http://www.malariajournal.com/content/9/1/373 https://doaj.org/toc/1475-2875 doi:10.1186/1475-2875-9-373 1475-2875 https://doaj.org/article/f352dd2f6680475e9b848217fd29f8ee Malaria Journal, Vol 9, Iss 1, p 373 (2010) Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 article 2010 ftdoajarticles https://doi.org/10.1186/1475-2875-9-373 2022-12-31T12:09:18Z Abstract Background In Vietnam, malaria is becoming progressively restricted to specific foci where human and vector characteristics alter the known malaria epidemiology, urging for alternative or adapted control strategies. Long-lasting insecticidal hammocks (LLIH) were designed and introduced in Ninh Thuan province, south-central Vietnam, to control malaria in the specific context of forest malaria. An entomological study in this specific forested environment was conducted to assess the behavioural patterns of forest and village vectors and to assess the spatio-temporal risk factors of malaria transmission in the province. Methods Five entomological surveys were conducted in three villages in Ma Noi commune and in five villages in Phuoc Binh commune in Ninh Thuan Province, south-central Vietnam. Collections were made inside the village, at the plot near the slash-and-burn fields in the forest and on the way to the forest. All collected mosquito species were subjected to enzyme-linked immunosorbent assay (ELISA) to detect Plasmodium in the head-thoracic portion of individual mosquitoes after morphological identification. Collection data were analysed by use of correspondence and multivariate analyses. Results The mosquito density in the study area was low with on average 3.7 anopheline bites per man-night and 17.4 culicine bites per man-night. Plasmodium- infected mosquitoes were only found in the forest and on the way to the forest. Malaria transmission in the forested malaria foci was spread over the entire night, from dusk to dawn, but was most intense in the early evening as nine of the 13 Plasmodium positive bites occurred before 21H. The annual entomological inoculation rate of Plasmodium falciparum was 2.2 infective bites per person-year to which Anopheles dirus s.s . and Anopheles minimus s.s . contributed. The Plasmodium vivax annual entomological inoculation rate was 2.5 infective bites per person-year with Anopheles sawadwongporni , Anopheles dirus s.s . and Anopheles pampanai as vectors. Conclusion ... Article in Journal/Newspaper Arctic Directory of Open Access Journals: DOAJ Articles Arctic Malaria Journal 9 1 |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
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English |
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Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 |
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Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 Speybroeck Niko Denis Leen Roelants Patricia Luu Nguyen Van Chut Nguyen Van Ham Nguyen Hoi Le Trung Ho Van Bortel Wim D'Alessandro Umberto Coosemans Marc Malaria transmission and vector behaviour in a forested malaria focus in central Vietnam and the implications for vector control |
topic_facet |
Arctic medicine. Tropical medicine RC955-962 Infectious and parasitic diseases RC109-216 |
description |
Abstract Background In Vietnam, malaria is becoming progressively restricted to specific foci where human and vector characteristics alter the known malaria epidemiology, urging for alternative or adapted control strategies. Long-lasting insecticidal hammocks (LLIH) were designed and introduced in Ninh Thuan province, south-central Vietnam, to control malaria in the specific context of forest malaria. An entomological study in this specific forested environment was conducted to assess the behavioural patterns of forest and village vectors and to assess the spatio-temporal risk factors of malaria transmission in the province. Methods Five entomological surveys were conducted in three villages in Ma Noi commune and in five villages in Phuoc Binh commune in Ninh Thuan Province, south-central Vietnam. Collections were made inside the village, at the plot near the slash-and-burn fields in the forest and on the way to the forest. All collected mosquito species were subjected to enzyme-linked immunosorbent assay (ELISA) to detect Plasmodium in the head-thoracic portion of individual mosquitoes after morphological identification. Collection data were analysed by use of correspondence and multivariate analyses. Results The mosquito density in the study area was low with on average 3.7 anopheline bites per man-night and 17.4 culicine bites per man-night. Plasmodium- infected mosquitoes were only found in the forest and on the way to the forest. Malaria transmission in the forested malaria foci was spread over the entire night, from dusk to dawn, but was most intense in the early evening as nine of the 13 Plasmodium positive bites occurred before 21H. The annual entomological inoculation rate of Plasmodium falciparum was 2.2 infective bites per person-year to which Anopheles dirus s.s . and Anopheles minimus s.s . contributed. The Plasmodium vivax annual entomological inoculation rate was 2.5 infective bites per person-year with Anopheles sawadwongporni , Anopheles dirus s.s . and Anopheles pampanai as vectors. Conclusion ... |
format |
Article in Journal/Newspaper |
author |
Speybroeck Niko Denis Leen Roelants Patricia Luu Nguyen Van Chut Nguyen Van Ham Nguyen Hoi Le Trung Ho Van Bortel Wim D'Alessandro Umberto Coosemans Marc |
author_facet |
Speybroeck Niko Denis Leen Roelants Patricia Luu Nguyen Van Chut Nguyen Van Ham Nguyen Hoi Le Trung Ho Van Bortel Wim D'Alessandro Umberto Coosemans Marc |
author_sort |
Speybroeck Niko |
title |
Malaria transmission and vector behaviour in a forested malaria focus in central Vietnam and the implications for vector control |
title_short |
Malaria transmission and vector behaviour in a forested malaria focus in central Vietnam and the implications for vector control |
title_full |
Malaria transmission and vector behaviour in a forested malaria focus in central Vietnam and the implications for vector control |
title_fullStr |
Malaria transmission and vector behaviour in a forested malaria focus in central Vietnam and the implications for vector control |
title_full_unstemmed |
Malaria transmission and vector behaviour in a forested malaria focus in central Vietnam and the implications for vector control |
title_sort |
malaria transmission and vector behaviour in a forested malaria focus in central vietnam and the implications for vector control |
publisher |
BMC |
publishDate |
2010 |
url |
https://doi.org/10.1186/1475-2875-9-373 https://doaj.org/article/f352dd2f6680475e9b848217fd29f8ee |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Malaria Journal, Vol 9, Iss 1, p 373 (2010) |
op_relation |
http://www.malariajournal.com/content/9/1/373 https://doaj.org/toc/1475-2875 doi:10.1186/1475-2875-9-373 1475-2875 https://doaj.org/article/f352dd2f6680475e9b848217fd29f8ee |
op_doi |
https://doi.org/10.1186/1475-2875-9-373 |
container_title |
Malaria Journal |
container_volume |
9 |
container_issue |
1 |
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1766346584298094592 |