Transmisión vertical de virus dengue en Aedes spp. (Diptera: Culicidae) en Medellín, Colombia

IF 0.5 4区农林科学 Q4 ENTOMOLOGY

Revista Colombiana de Entomologia Pub Date : 2020-08-27 DOI:10.25100/socolen.v46i1.6973

Guillermo L. Rúa-Uribe, Tatiana M. Giraldo-Jaramillo, Omar Triana-Chávez, Raúl Rojo, Enrique Henao, J. Pérez-Pérez

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引用次数: 2

Abstract

Dengue is the world’s most important arbovirus. It is transmitted by the bite of females Aedes spp. mosquitoes, which normally become infected by biting a viraemic host. There are, however, numerous studies that have identified vertical transmission as a rare yet important mechanism of vector infection. This study was conducted in order to quantify the occurrence of vertical transmission of dengue virus in Aedes mosquitoes collected by the Secretary of Health in Medellin, Colombia in 2016 (epidemic year) and 2017 (endemic year). Specimens were identified to species and tested for dengue in pools by RT-PCR. A total of 6,708 mosquitoes were collected; 96 % were Ae. aegypti, and 4 % were Ae. Albopictus. 294 of 2,211 pools tested were positive for dengue virus, and 50 of the positive pools were exclusively male mosquitoes. For both epidemic and the endemic years, vertical transmission was detected, though it was more frequent in 2016. Vertical transmission was observed in mosquitoes collected from all sectors of the city, without a distinct spatial pattern. Our results suggest that vertical transmission is a more frequent event with greater epidemiological relevance than previously estimated. Additional studies are required to verify the infectivity of the virus detected in male mosquitoes and to specify the role of vertical transmission in the incidence of dengue virus.

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哥伦比亚麦德林市伊蚊(双翅目:库蚊科)登革热病毒的垂直传播

登革热是世界上最重要的虫媒病毒。它是通过雌伊蚊叮咬传播的，雌伊蚊通常通过叮咬带有病毒的宿主而感染。然而，有许多研究已经确定垂直传播是一种罕见但重要的媒介感染机制。本研究旨在量化2016年(流行年)和2017年(流行年)哥伦比亚麦德林市卫生部长收集的伊蚊中登革热病毒垂直传播的发生情况。采用RT-PCR对池中标本进行了种类鉴定和登革热检测。共捕获蚊虫6708只;96%为Ae。埃及伊蚊，4%为伊蚊。在检测的2,211个蚊池中，有294个蚊池呈登革热病毒阳性，其中50个阳性蚊池为纯雄蚊。在流行年和流行年，都发现了垂直传播，尽管在2016年更为频繁。蚊虫垂直传播在全市各区均有发现，但无明显的空间分布规律。我们的研究结果表明，垂直传播比以前估计的更为频繁，具有更大的流行病学相关性。需要进行更多的研究，以核实在雄性蚊子中检测到的病毒的传染性，并具体说明垂直传播在登革热病毒发病率中的作用。

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

Revista Colombiana de Entomologia 生物-昆虫学

CiteScore

0.90

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： The Revista Colombiana de Entomología (Rev. Colomb. Entomol.) is the official scientific publication of the Colombian Society of Entomology - SOCOLEN since april of 1975. The journal is published twice a year. Contributions include Original Research Papers, Reviews of Entomological Topics (under a request from the Editorial Board), Taxonomic Papers, Points of View, New Records, Scientific Notes, Book Reviews, and Obituaries. The Revista Colombiana de Entomología welcomes contributions from both national and international researchers, and from members or non-members of the Society. Paper acceptance will depend on the evaluation of national and international academic peers. Manuscripts submitted for publication may be written in Spanish or English.