ITS 2 sequences heterogeneity in Phlebotomus sergenti and Phlebotomus similis (Diptera, Psychodidae):: possible consequences in their ability to transmit Leishmania tropica
ITS 2 sequences heterogeneity in Phlebotomus sergenti and Phlebotomus similis (Diptera, Psychodidae):: possible consequences in their ability to transmit Leishmania tropica
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DOI：
10.1016/s0020-7519(02)00088-7
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发表时间：
2002-08-01
影响因子：
4
通讯作者：
Volf, P
中科院分区：
文献类型：
--
作者：
Depaquit, J;Ferté, H;Volf, P
对热带利什曼原虫副白蛉亚属中主要的也是唯一已证实的媒介--赛氏白蛉进行了种内研究。比较了来自10个国家（塞浦路斯、埃及、意大利、黎巴嫩、摩洛哥、巴基斯坦、葡萄牙、西班牙、叙利亚和土耳其）的12个人群的ITS 2序列。样本中还包括三个与赛氏白蛉密切相关的物种：相似白蛉（来自希腊和马耳他的三个种群）、Jacusieli白蛉和Kazeruni白蛉。我们的研究结果证实了有效性的类群形态特征，并意味着修订其分布区，这是通过地理事件解释。在中新世时期，一条迁移路线，在副特提斯海以北，将被P. similis沿着高加索北部，克里米亚，巴尔干半岛，包括希腊及其岛屿和土耳其西部殖民。塞氏白蛉可能沿着亚洲的传播路线以及特提斯海以南的西向迁徙路线，殖民北非和西欧。这一假设似乎得到了很好的支持，在本研究中观察到的高度变化，这是不相关的殖民或种群内的变化。从生态学、寄主选择和分布等方面可将其划分为东方和西方两大类群。热带。我们假设它们可能与向量容量的差异相关。(C)2002年澳大利亚寄生虫学会由Elsevier Science Ltd.出版，版权所有。
An intraspecific study on Phlebotomus sergenti, the main and only proven vector of Leishmania tropica among the members of the subgenus Paraphlebotomus was performed. The internal transcribed spacer 2 (ITS2) sequences of 12 populations from 10 countries (Cyprus, Egypt, Italy, Lebanon, Morocco, Pakistan, Portugal, Spain, Syria, and Turkey) were compared. Samples also included three species closely related to P. sergenti: Phlebotomus similis (three populations from Greece and Malta), Phlebotomus jacusieli and Phlebotomus kazeruni. Our results confirm the validity of the taxa morphologically characterised, and imply the revision of their distribution areas, which are explained through biogeographical events. At the Miocene time, a migration route, north of the Paratethys sea would have been followed by P. similis to colonise the north of the Caucasus, Crimea, Balkans including Greece and its islands, and western Turkey. Phlebotomus sergenti would have followed an Asiatic dispersion as well as a western migration route south of the Tethys sea to colonise North Africa and western Europe. This hypothesis seems to be well supported by high degree of variation observed in the present study, which is not related to colonisation or to intra-populational variation. Two groups can be individualised, one oriental and one western in connection with ecology, host preferences and distribution of L. tropica. We hypothesise that they could be correlated with differences in vectorial capacities. (C) 2002 Australian Society for Parasitology Inc. Published by Elsevier Science Ltd. All rights reserved.