School of Veterinary Medicine, Department of Veterinary Epidemiology and Economics, Universidad Nacional Mayor de San Marcos, Av. Circunvalacion 2800, San Borja, Lima, 41, Peru.
Facultad de Medicina Veterinaria Y Zootecnia, Universidad Científica del Sur, Lima, Peru.
Parasitol Res. 2023 Aug;122(8):1915-1921. doi: 10.1007/s00436-023-07892-6. Epub 2023 Jun 5.
Hydatigera taeniaeformis is a cestode that uses felines and rodents as definitive and intermediate hosts, respectively. Its larval stage, or metacestode, infects a wide variety of rodent species and develops in the liver parenchyma into a cyst. The aim of this study was to evaluate the occurrence of H. taeniaeformis metacestode in various species of wild rodents from Peru. For this, the livers of 356 rodents were macroscopically examined for any parasitic form compatible with metacestodes. Metacestodes were identified by measuring characteristic morphological parameters, and the diagnosis was confirmed by molecular analysis of a fragment of the cytochrome c oxidase subunit 1 gene (cox1). Five rodents: two small-eared pygmy rice rats (Oligoryzomys microtis), two white-naped squirrels (Simosciurus nebouxii), and one pygmy rice rat (Oligoryzomys sp.) were infected with H. taeniaeformis metacestodes. The cox1 sequences from our metacestodes showed up to 100% identity with previous H. taeniaeformis sequences from the GenBank. These results demonstrated the occurrence of H. taeniaeformis in new intermediate hosts, as well as the first molecular contribution for H. taeniaeformis from Peru.
细粒棘球绦虫是一种绦虫，分别使用猫科动物和啮齿动物作为终末宿主和中间宿主。其幼虫阶段，或囊尾蚴，感染了多种啮齿动物物种，并在肝脏实质中发育成囊肿。本研究旨在评估细粒棘球绦虫囊尾蚴在秘鲁各种野生啮齿动物中的发生情况。为此，对 356 只啮齿动物的肝脏进行了宏观检查，以寻找与囊尾蚴相容的任何寄生虫形式。通过测量特征形态参数来鉴定囊尾蚴，并通过对细胞色素 c 氧化酶亚基 1 基因（cox1）片段的分子分析确认诊断。有五种啮齿动物感染了细粒棘球绦虫囊尾蚴：两只小耳稻鼠（Oligoryzomys microtis）、两只白颈松鼠（Simosciurus nebouxii）和一只稻鼠（Oligoryzomys sp.）。我们的囊尾蚴的 cox1 序列与 GenBank 中以前的细粒棘球绦虫序列具有高达 100%的同一性。这些结果表明细粒棘球绦虫在新的中间宿主中存在，同时也是秘鲁首次对细粒棘球绦虫进行分子贡献。
