Guerreiro Martins Natalia Beatriz, Robles María Del Rosario, Knoff Marcelo, Navone Graciela Teresa, Callejón Rocío
Centro de Estudios Parasitológicos y de Vectores (CEPAVE), Bv 120 e/ 60 y 64, (1900). CCT- CONICET- La Plata, Universidad Nacional de La Plata, Buenos Aires, Argentina.
Laboratório de Helmintos Parasitos de Vertebrados, Instituto Oswaldo Cruz, Fiocruz, Avenida Brasil, 4365, Manguinhos, Rio de Janeiro, Brazil.
Int J Parasitol Parasites Wildl. 2022 Aug 11;19:56-67. doi: 10.1016/j.ijppaw.2022.07.002. eCollection 2022 Dec.
The purpose of this paper was to study specimens of the genus isolated from eight species of Sigmodontinae rodents (Rodentia: Cricetidae) from six provinces in the Cuenca del Plata, Argentina, based on morphological, morphometric and molecular characteristics (ITS1 rDNA and 1 mtDNA). The genetic distances among studied specimens and other Hymenolepididae from rodents available in the GenBank were analyzed and phylogenetic inferences were provided. A total of 955 specimens of Sigmodontinae rodents were examined from seven localities of six provinces in the Cuenca del Plata region in Argentina. Tapeworms were removed from the rodents' small intestines. Conventional studies were used for the morphological and molecular analysis. Specimens of were identified. An amended diagnosis and detailed morphological description of this species is provided. The molecular analyses showed that the specimens studied form the same clade as that of previously studied from other hosts and regions. The genetic polymorphisms of observed corresponded to different groups of species hosts and regions. Moreover, eight species of sigmodontine rodents and 33 localities from the Cuenca del Plata region in Argentina constitute new host and geographical records. This study shows the importance of using integrative taxonomic approaches that combine morphological and molecular characters to understand biological diversity. Moreover, the discovery of in humans suggests the importance of further studies on this zoonotic cestode. This study provides important data on the taxonomy and distribution of to advance knowledge of the transmission dynamics of this parasite.
本文旨在基于形态学、形态测量学和分子特征（ITS1 rDNA和1个线粒体DNA），对从阿根廷普拉塔河流域六个省份的八种稻鼠亚科啮齿动物（啮齿目：仓鼠科）中分离出的该属标本进行研究。分析了所研究标本与GenBank中可获得的来自啮齿动物的其他膜壳绦虫科之间的遗传距离，并提供了系统发育推断。从阿根廷普拉塔河流域地区六个省份的七个地点共检查了955只稻鼠亚科啮齿动物标本。从啮齿动物的小肠中取出绦虫。采用常规研究方法进行形态学和分子分析。鉴定了该属的标本。提供了该物种的修订诊断和详细形态描述。分子分析表明，所研究的标本与先前从其他宿主和地区研究的该属标本形成了相同的进化枝。观察到的该属的遗传多态性对应于不同的物种宿主和地区组。此外，阿根廷普拉塔河流域地区的八种稻鼠亚科啮齿动物和33个地点构成了新的宿主和地理记录。本研究表明了采用结合形态学和分子特征的综合分类方法来理解生物多样性的重要性。此外，在人类中发现该属表明了对这种人畜共患绦虫进行进一步研究的重要性。本研究提供了关于该属分类和分布的重要数据，以推进对这种寄生虫传播动态的认识。
