Entomological investigation after an outbreak of dengue at the riverside of Rio Doce, Espírito Santo State, Brazil.

IF 1.9 4区医学 Q3 PUBLIC, ENVIRONMENTAL & OCCUPATIONAL HEALTH

Transactions of The Royal Society of Tropical Medicine and Hygiene Pub Date : 2024-12-11 DOI:10.1093/trstmh/trae123

Helder Ricas Rezende, Creuza Rachel Vicente, Samira Chahad-Ehlers, Orlei Amaral Cardoso, Crispim Cerutti, Camila Malta Romano, Caio Santos de Souza, Giovana Santos Caleiro, Bruno Luiz Miranda Guedes, Lucas Mendes Ferreira, Filomena Euridice Carvalho de Alencar

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引用次数: 0

Abstract

Background: In 2019, a dengue outbreak involving Aedes albopictus occurred in a rural area of Espírito Santo, Brazil, motivating our study in Sooretama and Linhares.

Methods: We set traps to sample immature mosquito larvae at 40 sites, with weekly inspections from July 2022 to January 2023. Adult specimens were collected monthly at 19 sites, each collection lasting 15 min. The collections were performed during daylight using a Castro vacuum device, a small electric vacuum suction device, a net capture device and insect cages. We conducted molecular analyses of adult Aedes to identify arbovirus infection.

Results: Among 20 217 immature forms, we identified Aedes aegypti (n=16 340), Aedes albopictus (n=3403), Culex quinquefasciatus (n=426) and Limatus durhami Theobald 1901 (n=48). Of the 3026 adult specimens, there were C. quinquefasciatus (n=2857), A. aegypti (n=141) and A. albopictus (n=28). Each site had an average of 159 adult specimens, 16 per house. Among the 159 specimens, 150 were C. quinquefasciatus. The average frequency of adult A. aegypti per house was 1.2 (0.08 per minute of collection). Adult Aedes were not infected.

Conclusions: Entomological surveillance should consider A. albopictus and A. aegypti in rural areas, providing proper vector control strategies to prevent the spread of arboviruses.

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巴西圣州Espírito里约热内卢Doce河畔登革热暴发后的昆虫学调查。

背景：2019年，巴西圣Espírito农村地区发生了一起涉及白纹伊蚊的登革热疫情，促使我们在Sooretama和Linhares进行研究。方法：于2022年7月至2023年1月，在40个监测点设置诱蚊器，每周监测一次。每月在19个地点采集成虫标本，每次采集15 min。白天使用Castro真空装置、小型电动真空吸盘、网捕装置和虫笼进行采集。我们对成年伊蚊进行了分子分析，以确定虫媒病毒感染。结果：在20 217只未成熟蚊中，鉴定出埃及伊蚊（16 340只）、白纹伊蚊（3403只）、致倦库蚊（426只）和杜哈密灰僵蚊1901只（48只）。3026只成虫中，致倦库蚊2857只，埃及伊蚊141只，白纹伊蚊28只。每个站点平均有159个成虫标本，每户16个。159份标本中致倦库蚊150份。每户平均捕获埃及伊蚊1.2只（0.08只/ min）。成年伊蚊未感染。结论：昆虫学监测应考虑农村地区白纹伊蚊和埃及伊蚊，提供适当的媒介控制策略，防止虫媒病毒的传播。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Transactions of The Royal Society of Tropical Medicine and Hygiene 医学-公共卫生、环境卫生与职业卫生

CiteScore

4.00

自引率

9.10%

发文量

115

审稿时长

4-8 weeks

期刊介绍： Transactions of the Royal Society of Tropical Medicine and Hygiene publishes authoritative and impactful original, peer-reviewed articles and reviews on all aspects of tropical medicine.