The expansion of an invasive malaria vector: Anopheles stephensi emergence in Arba Minch town in the southern Rift Valley of Ethiopia.

IF 1.8 3区 医学 Q2 PARASITOLOGY Parasitology Research Pub Date : 2024-09-27 DOI:10.1007/s00436-024-08356-1
Fekadu Massebo, Temesgen Ashine, Nigatu Negash, Nigatu Eligo, Elifaged Hailemeskel, Thomas T Minda, Bernt Lindtjørn, Endalamaw Gadisa
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Abstract

Urban areas in malaria-endemic countries in East Africa are experiencing a significant increase in malaria cases, with the establishment of an "exotic" urban malaria vector, Anopheles stephensi, increasing the risk of urban malaria. To this end, the present study aimed to investigate the emergence of this species in Arba Minch, Ethiopia. Following the detection of An. stephensi in other parts of Ethiopia, 76 artificial containers (55 discarded tyres, 18 concrete water storage, and three plastic containers) were sampled in 21 locations in Arba Minch town, for immature Anopheles mosquito stages, using the standard dipping technique. Larvae were reared into adults which were morphologically identified at the species level 2-3 days after emergence. Morphological identification results were confirmed by species-specific polymerase chain reaction. Of the examined containers, 67 (88%) had at least one Anopheles larva. Thirty-two of the adults emerged were morphologically identified as An. stephensi, with 26 (81%) confirmed by molecular analysis. This is the first study to report An. stephensi from Arba Minch, one of South Ethiopia's largest towns, highlighting the need for increased vigilance. The planned and ongoing study in and around Arba Minch will contribute to understanding the bionomics and role of An. stephensi in malaria parasite transmission, helping develop a strategy to address the impending risk of urban malaria in Ethiopia.

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外来疟疾病媒的扩张:埃塞俄比亚南部裂谷阿尔巴明奇镇出现的史蒂芬斯按蚊。
东非疟疾流行国家的城市地区疟疾病例显著增加,"外来 "城市疟疾病媒按蚊的出现增加了城市疟疾的风险。为此,本研究旨在调查这一物种在埃塞俄比亚阿尔巴明奇的出现情况。继在埃塞俄比亚其他地区发现史蒂芬斯按蚊之后,我们在阿尔巴明奇镇的 21 个地点对 76 个人工容器(55 个废弃轮胎、18 个混凝土储水器和 3 个塑料容器)进行了取样,采用标准浸渍技术检测按蚊的幼虫阶段。幼虫被饲养成成虫,出壳 2-3 天后进行物种形态鉴定。形态鉴定结果通过物种特异性聚合酶链反应进行确认。在检查过的容器中,67 个(88%)至少有一只按蚊幼虫。在出现的成虫中,有 32 只经形态学鉴定为史蒂芬疟蚊,其中 26 只(81%)经分子分析确认。这是首次研究报告在埃塞俄比亚南部最大的城镇之一阿尔巴明奇发现了史蒂芬斯疟蚊,这凸显了提高警惕的必要性。计划在阿尔巴明奇及其周边地区进行的持续研究将有助于了解疟原虫的生物组学及其在疟原虫传播中的作用,有助于制定一项战略来应对埃塞俄比亚城市疟疾的紧迫风险。
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来源期刊
Parasitology Research
Parasitology Research 医学-寄生虫学
CiteScore
4.10
自引率
5.00%
发文量
346
审稿时长
6 months
期刊介绍: The journal Parasitology Research covers the latest developments in parasitology across a variety of disciplines, including biology, medicine and veterinary medicine. Among many topics discussed are chemotherapy and control of parasitic disease, and the relationship of host and parasite. Other coverage includes: Protozoology, Helminthology, Entomology; Morphology (incl. Pathomorphology, Ultrastructure); Biochemistry, Physiology including Pathophysiology; Parasite-Host-Relationships including Immunology and Host Specificity; life history, ecology and epidemiology; and Diagnosis, Chemotherapy and Control of Parasitic Diseases.
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