Dyab Ahmed K, Galal Lamia A, Mahmoud Abeer E, Mokhtar Yasser
Department of Parasitology, Faculty of Medicine, Assiut University, Assiut, Egypt.
Korean J Parasitol. 2016 Jun;54(3):265-72. doi: 10.3347/kjp.2016.54.3.265. Epub 2016 Jun 30.
Wolbachia is an obligatory intracellular endosymbiotic bacterium, present in over 20% of all insects altering insect reproductive capabilities and in a wide range of filarial worms which is essential for worm survival and reproduction. In Egypt, no available data were found about Wolbachia searching for it in either mosquitoes or filarial worms. Thus, we aimed to identify the possible concurrent presence of Wolbachia within different mosquitoes and filarial parasites, in Assiut Governorate, Egypt using multiplex PCR. Initially, 6 pools were detected positive for Wolbachia by single PCR. The simultaneous detection of Wolbachia and filarial parasites (Wuchereria bancrofti, Dirofilaria immitis, and Dirofilaria repens) by multiplex PCR was spotted in 5 out of 6 pools, with an overall estimated rate of infection (ERI) of 0.24%. Unexpectedly, the highest ERI (0.53%) was for Anopheles pharoensis with related Wolbachia and W. bancrofti, followed by Aedes (0.42%) and Culex (0.26%). We also observed that Wolbachia altered Culex spp. as a primary vector for W. bancrofti to be replaced by Anopheles sp. Wolbachia within filaria-infected mosquitoes in our locality gives a hope to use bacteria as a new control trend simultaneously targeting the vector and filarial parasites.
沃尔巴克氏体是一种必需的细胞内共生细菌,存在于超过20%的昆虫体内,可改变昆虫的繁殖能力,还存在于多种丝虫中,对丝虫的生存和繁殖至关重要。在埃及,尚未找到在蚊子或丝虫中搜索沃尔巴克氏体的相关数据。因此,我们旨在使用多重PCR技术,确定埃及阿斯尤特省不同蚊子和丝虫寄生虫体内沃尔巴克氏体可能的共存情况。最初,通过单重PCR检测到6个样本池的沃尔巴克氏体呈阳性。通过多重PCR同时检测沃尔巴克氏体和丝虫寄生虫(班氏吴策线虫、犬恶丝虫和匐行恶丝虫)时,在6个样本池中有5个发现了阳性,总体估计感染率(ERI)为0.24%。出乎意料的是,感染率最高的是与沃尔巴克氏体和班氏吴策线虫相关的法老按蚊,为0.53%,其次是伊蚊(0.42%)和库蚊(0.26%)。我们还观察到,沃尔巴克氏体改变了作为班氏吴策线虫主要传播媒介的库蚊属,使其被按蚊属取代。我们当地感染丝虫的蚊子体内的沃尔巴克氏体为同时针对传播媒介和丝虫寄生虫使用细菌作为一种新的控制趋势带来了希望。