Schmitt M, Saucy F, Wyborn S, Gottstein B
Institut für Tierpathologie, Universität Bern.
Schweiz Arch Tierheilkd. 1997;139(2):84-93.
The results of an investigation on Echinococcus multilocularis-metacestodes in European water voles (Arvicola terrestris) are shown. The investigation materials were 28 water voles captured in Schermann-traps on a meadow in the canton of Fribourg and subsequently maintained in laboratory cages. The animals were patho-anatomically and histo-pathologically examined, a part of them additionally with an E. multilocularis-specific direct immunofluorescence-assay and/or a polymerase-chain-reaction. Radiographs were obtained from one animal, showing typical calcifications as they often occur with alveolar echinococcosis. Altogether 11 out of 28 (39%) animals proved to be infected with E. multilocularis. As far as we know this represents the highest percentage of infested intermediate hosts ascertained in Europe. However, fertile, i.e. able to infect, protoscolices were detected in only two cases. In spite of this small number of protoscolices it can be shown that A. terrestris is able to maintain the lifecycle of this cestode at least spatially and temporally limited. In conclusion the possible measures for reducing the infection risk of the people in the affected community are shortly discussed.
展示了对欧洲水田鼠（Arvicola terrestris）体内多房棘球绦虫幼虫的调查结果。调查材料是在弗里堡州一片草地上用舍尔曼陷阱捕获的28只水田鼠，随后将它们饲养在实验室笼子里。对这些动物进行了病理解剖学和组织病理学检查，其中一部分还进行了多房棘球绦虫特异性直接免疫荧光测定和/或聚合酶链反应。对一只动物进行了X光检查，显示出典型的钙化，这在肺泡型棘球蚴病中经常出现。28只动物中共有11只（39%）被证明感染了多房棘球绦虫。据我们所知，这是欧洲确定的中间宿主感染率最高的情况。然而，仅在两例中检测到有繁殖能力、即能够感染的原头节。尽管原头节数量很少，但可以证明，水田鼠至少在空间和时间有限的情况下能够维持这种绦虫的生命周期。最后简要讨论了降低受影响社区人群感染风险的可能措施。
