Evaluating the mosquito population dynamics using Human Landing and Human Double Net catches in a dengue emerging area; A case study from Sri Lanka

IF 2.5 3区医学 Q2 PARASITOLOGY

Acta tropica Pub Date : 2025-09-02 DOI:10.1016/j.actatropica.2025.107818

T.K.C. Wickramasinghe , S.N. Weerakoon , T. Ranathunge , P. Nitharsini , A. Perera , A.S.J. Bandara

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引用次数: 0

Abstract

Human Landing Collection (HLC) and Human Double Net (HDN) trap are widely used adult mosquito sampling techniques that contribute to effective vector surveillance and dengue control planning. This study evaluated the effectiveness of HLC and HDN, mosquito species composition, and biting activity of dengue vectors in two dengue-endemic areas, Mawanella and Dehiovita (Kegalle District, Sri Lanka). Monthly collections were conducted from July 2023 to March 2024 using three HLC collectors and one HDN for 24-hour sampling per site. The total mosquito count (N = 807) varied significantly based on sampling method (HLC vs. HDN), locality, and species composition (P < 0.05, one-way ANOVA). HLC was the most effective sampling method, yielding the highest mosquito count (P < 0.05, t-test), with significantly higher mosquito abundance in Mawanella (P < 0.05, t-test). Among the collected mosquitoes, Culex spp. (n = 302) were the most abundant, followed by Armigeres spp. (n = 285), Aedes albopictus (n = 215), and Ae. aegypti (n = 5). The low abundance of Ae. aegypti suggests that Ae. albopictus is the primary dengue vector in the study area. The density of Ae. albopictus increased progressively from September onwards. Biting rate analysis revealed significant peaks from 06:00–09:00 and 15:00–18:00 hrs (P < 0.05, one-way ANOVA), with extended activity until 21:00 hrs. These findings highlight the need to schedule space-spraying interventions during peak biting hours and reinforce the importance of sustained personal protective measures in the evening. Additionally, integrating adult mosquito control with larval source reduction strategies is essential for comprehensive dengue vector management.

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人网法和人网法评价登革热疫区蚊虫种群动态来自斯里兰卡的案例研究

人登陆采集（HLC）和人双网（HDN）诱捕器是广泛使用的成蚊采样技术，有助于有效的媒介监测和登革热控制规划。本研究在斯里兰卡Kegalle区两个登革热流行区（Mawanella和Dehiovita）评估了HLC和HDN的有效性、蚊虫种类组成和登革热媒介的叮咬活性。从2023年7月至2024年3月，每个站点使用3台HLC收集器和1台HDN进行24小时采样。蚊虫总数（N = 807）因采样方式（HLC vs. HDN）、地点和种类组成差异有统计学意义（P < 0.05，单因素方差分析）。高效液相色谱法是最有效的采样方法，蚊虫数量最高（P < 0.05， t检验），马瓦氏菌的蚊虫丰度显著高于马瓦氏菌（P < 0.05， t检验）。蚊种以库蚊最多（302种），其次是阿蚊（285种）、白纹伊蚊（215种）和伊蚊（215种）。埃及伊蚊（n = 5）。伊蚊的低丰度。埃及伊蚊表明；白纹伊蚊是研究地区的主要登革热媒介。Ae的密度。白纹伊蚊由九月起逐渐增加。咬伤率分析显示，咬伤高峰出现在06:00-09:00和15:00-18:00 （P < 0.05，单因素方差分析），活动持续至21:00。这些发现强调了在蚊虫叮咬高峰期安排空间喷洒干预措施的必要性，并强调了在夜间采取持续个人防护措施的重要性。此外，将成蚊控制与减少幼虫源战略相结合对于登革热病媒综合管理至关重要。

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来源期刊

Acta tropica 医学-寄生虫学

CiteScore

5.40

自引率

11.10%

发文量

383

审稿时长

37 days

期刊介绍： Acta Tropica, is an international journal on infectious diseases that covers public health sciences and biomedical research with particular emphasis on topics relevant to human and animal health in the tropics and the subtropics.