干旱区生态环境知识资源中心(Arid): Effects of vegetation densities on the performance of attractive targeted sugar baits (ATSBs) for malaria vector control: a semi-field study

Arid

DOI	10.1186/s12936-023-04625-z
	Effects of vegetation densities on the performance of attractive targeted sugar baits (ATSBs) for malaria vector control: a semi-field study
	Muyaga, Letus L.; Meza, Felician C.; Kahamba, Najat F.; Njalambaha, Rukiyah M.; Msugupakulya, Betwel J.; Kaindoa, Emmanuel W.; Ngowo, Halfan S.; Okumu, Fredros O.
通讯作者	Muyaga, LL ; Okumu, FO
来源期刊	MALARIA JOURNAL
EISSN	1475-2875
出版年	2023
卷号	22 期号:1
英文摘要	BackgroundAttractive targeted sugar baits (ATSBs) control sugar-feeding mosquitoes with oral toxicants, and may effectively complement core malaria interventions, such as insecticide-treated nets even where pyrethroid-resistance is widespread. The technology is particularly efficacious in arid and semi-arid areas. However, their performance remains poorly-understood in tropical areas with year-round malaria transmission, and where the abundant vegetation constitutes competitive sugar sources for mosquitoes. This study compared the efficacies of ATSBs (active ingredient: 2% boric acid) in controlled settings with different vegetation densities.MethodsPotted mosquito-friendly plants were introduced inside semi-field chambers (9.6 m by 9.6 m) to simulate densely-vegetated, sparsely-vegetated, and bare sites without any vegetation (two chambers/category). All chambers had volunteer-occupied huts. Laboratory-reared Anopheles arabiensis were released nightly (200/chamber) and host-seeking females recaptured using human landing catches outdoors (8.00 p.m.-9.00 p.m.) and CDC-light traps indoors (9.00 p.m.-6.00 a.m.). Additionally, resting mosquitoes were collected indoors and outdoors each morning using Prokopack aspirators. The experiments included a before-and-after set-up (with pre-ATSBs, ATSBs and post-ATSBs phases per chamber), and a treatment vs. control set-up (where similar chambers had ATSBs or no ATSBs). The experiments lasted 84 trap-nights.ResultsIn the initial tests when all chambers had no vegetation, the ATSBs reduced outdoor-biting by 69.7%, indoor-biting by 79.8% and resting mosquitoes by 92.8%. In tests evaluating impact of vegetation, the efficacy of ATSBs against host-seeking mosquitoes was high in bare chambers (outdoors: 64.1% reduction; indoors: 46.8%) but modest or low in sparsely-vegetated (outdoors: 34.5%; indoors: 26.2%) and densely-vegetated chambers (outdoors: 25.4%; indoors: 16.1%). Against resting mosquitoes, the ATSBs performed modestly across settings (non-vegetated chambers: 37.5% outdoors and 38.7% indoors; sparsely-vegetated: 42.9% outdoors and 37.5% indoors; densely-vegetated: 45.5% outdoors and 37.5% indoors). Vegetation significantly reduced the ATSBs efficacies against outdoor-biting and indoor-biting mosquitoes but not resting mosquitoes.ConclusionWhile vegetation can influence the performance of ATSBs, the devices remain modestly efficacious in both sparsely-vegetated and densely-vegetated settings. Higher efficacies may occur in places with minimal or completely no vegetation, but such environments are naturally unlikely to sustain Anopheles populations or malaria transmission in the first place. Field studies therefore remain necessary to validate the efficacies of ATSBs in the tropics.
英文关键词	Anopheles arabiensis Attractive targeted sugar baits ATSBs Vegetation densities Ifakara Health Institute Outdoor biting Indoor biting and semi-field
类型	Article
语种	英语
开放获取类型	Green Published, Green Accepted, gold, Green Submitted
收录类别	SCI-E
WOS记录号	WOS:001010341500001
WOS关键词	ADULT CULEX-PIPIENS ; ANOPHELES-GAMBIAE ; SERGENTII ; MOSQUITOS ; SURVIVAL ; BEHAVIOR ; PLANTS
WOS类目	Infectious Diseases ; Parasitology ; Tropical Medicine
WOS研究方向	Infectious Diseases ; Parasitology ; Tropical Medicine
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/397799
推荐引用方式 GB/T 7714	Muyaga, Letus L.,Meza, Felician C.,Kahamba, Najat F.,et al. Effects of vegetation densities on the performance of attractive targeted sugar baits (ATSBs) for malaria vector control: a semi-field study[J],2023,22(1).
APA	Muyaga, Letus L..,Meza, Felician C..,Kahamba, Najat F..,Njalambaha, Rukiyah M..,Msugupakulya, Betwel J..,...&Okumu, Fredros O..(2023).Effects of vegetation densities on the performance of attractive targeted sugar baits (ATSBs) for malaria vector control: a semi-field study.MALARIA JOURNAL,22(1).
MLA	Muyaga, Letus L.,et al."Effects of vegetation densities on the performance of attractive targeted sugar baits (ATSBs) for malaria vector control: a semi-field study".MALARIA JOURNAL 22.1(2023).