Imaging the lifecycle of Microsporidia sp. MB in Anopheles coluzzii from western Burkina Faso reveals octosporogony.

IF 3.7 2区 生物学 Q2 MICROBIOLOGY
mSphere Pub Date : 2025-06-25 Epub Date: 2025-05-22 DOI:10.1128/msphere.00851-24
Ewan R S Parry, Roland Pevsner, Beth C Poulton, Deepak-Kumar Purusothaman, Abdelhakeem I Adam, Sare Issiaka, Thomas H Ant, Stephanie M Rainey, Etienne Bilgo, Abdoulaye Diabaté, Steven P Sinkins
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引用次数: 0

Abstract

A newly discovered microsporidian, Microsporidia sp. MB (MB), was recently found to block Plasmodium falciparum transmission in Anopheles arabiensis mosquitoes from Kenya. Here, we describe the lifecycle of the first laboratory colony of Anopheles coluzzii with MB, originating from western Burkina Faso. The lifecycle of MB was explored using fluorescent in situ hybridization and confocal microscopy, facilitated by the development of optimized protocols to produce histological sections of whole adult, larval, and embryo tissues. As in An. arabiensis, transmission appears to be predominantly vertical, with MB highly localized to the ovaries across multiple lifecycle stages. MB was sparsely distributed within the majority of developing oocytes in the gravid female. After oviposition, in the majority of embryos, MB relocated to the developing gonad at the onset of tissue differentiation, suggesting a highly specialized adaptation to host tissues. Sporogony was identified for the first time in a proportion of developing oocytes and in embryos post-oviposition. Microsporidian spore characteristics were subsequently confirmed with electron microscopy. Identification of MB sporogony in eggs suggests there are alternative horizontal routes of transmission which could play an important role in developing MB as a malaria control strategy.

Importance: Malaria in West Africa, caused by Plasmodium falciparum infection and spread by anopheline mosquitoes, is responsible for hundreds of thousands of deaths annually and resulted in over 120 million cases in 2022 . The transmission-blocking effect of Microsporidia sp. MB (MB) suggests its potential as an agent for combating the spread of malaria. Understanding the routes of transmission and their effect on MB in mosquito populations is crucial for its development as a control tool. The identification of MB spores reveals the potential for another avenue of transmission beyond the vertical transmission from female to offspring. Spores could also have the potential for alternative MB dissemination methods, alongside or instead of adult mosquito releases.

布基纳法索西部科鲁兹按蚊微孢子虫sp. MB的生命周期成像显示八孢子制。
一种新发现的微孢子虫,微孢子虫sp. MB (MB),最近被发现阻断了恶性疟原虫在肯尼亚阿拉伯按蚊中的传播。在这里,我们描述了来自布基纳法索西部的第一个带有MB的科鲁兹按蚊实验室群体的生命周期。利用荧光原位杂交和共聚焦显微镜研究了MB的生命周期,并制定了优化的方案来制作整个成虫、幼虫和胚胎组织的组织学切片。就像在An。arabiensis的传播似乎主要是垂直的,在多个生命周期阶段,MB高度局限于卵巢。在妊娠的雌性中,MB在大多数发育中的卵母细胞中稀疏分布。产卵后,在大多数胚胎中,MB在组织分化开始时迁移到发育中的性腺,表明对宿主组织的高度特化适应。首次在发育中的卵母细胞和产卵后的胚胎中发现了孢子发生。微孢子虫孢子特征随后用电镜证实。对结核分枝杆菌卵孢子体的鉴定表明存在其他水平传播途径,这可能在将结核分枝杆菌发展为疟疾控制策略方面发挥重要作用。重要性:西非的疟疾由恶性疟原虫感染引起,并由按蚊传播,每年造成数十万人死亡,2022年的病例超过1.2亿例。微孢子虫(Microsporidia sp. MB,简称MB)的传播阻断作用提示其作为抗疟疾传播剂的潜力。了解结核分枝杆菌的传播途径及其对蚊虫种群的影响对于开发结核分枝杆菌作为一种控制工具至关重要。结核分枝杆菌孢子的鉴定表明,除了从雌性到后代的垂直传播外,还有另一种传播途径的可能性。孢子也可能有替代结核分枝杆菌传播方法的潜力,与成年蚊子释放一起或代替。
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来源期刊
mSphere
mSphere Immunology and Microbiology-Microbiology
CiteScore
8.50
自引率
2.10%
发文量
192
审稿时长
11 weeks
期刊介绍: mSphere™ is a multi-disciplinary open-access journal that will focus on rapid publication of fundamental contributions to our understanding of microbiology. Its scope will reflect the immense range of fields within the microbial sciences, creating new opportunities for researchers to share findings that are transforming our understanding of human health and disease, ecosystems, neuroscience, agriculture, energy production, climate change, evolution, biogeochemical cycling, and food and drug production. Submissions will be encouraged of all high-quality work that makes fundamental contributions to our understanding of microbiology. mSphere™ will provide streamlined decisions, while carrying on ASM''s tradition for rigorous peer review.
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