Department of Zoology and Fisheries, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences, Prague 6, Suchdol, 165 21, Czech Republic.
Ecotoxicology. 2010 Jun;19(5):928-32. doi: 10.1007/s10646-010-0474-3. Epub 2010 Mar 6.
The tapeworm Moniezia expansa and naturally infected sheep were investigated with respect to their lead accumulation. Lead-Pb(CH(3)COO)(2) was added to the distilled water and administered orally to the sheep every day for a period of 1 week. After the exposure period the sheep were killed and the metal levels were determined in the muscle, liver, kidney and blood of the sheep as well as in the cestode parasites (Moniezia expansa). The impact of an infection with the cestode Moniezia expansa and a simultaneous Pb exposure, on the concentrations of heavy metals in the host kidney, liver, muscle, blood and cestodes was studied. The concentration of lead in the cestodes was on average 458, 5 and 4-fold higher in the cestodes than in the muscle, liver and kidney of the host, respectively. Parasitised sheep accumulated significantly less lead in their tissues than their uninfected conspecifics (ANOVA test, P < or = 0.05). Also the differences between host's tissues and tapeworms were found to be significant (ANOVA test, P < or = 0.05). Thus, this study reveals that lead accumulation also occurs in cestodes parasitizing mammals. The host-parasite-system sheep-Moniezia expansa appears to be a useful and promising bioindication system especially in farming (rural, agricultural) and the natural ecosystem.
对扩展孟氏绦虫及其自然感染的绵羊进行了铅积累研究。将醋酸铅 Pb(CH(3)COO)(2) 加入蒸馏水中，每天给绵羊口服一次，持续 1 周。暴露期结束后，杀死绵羊，测定绵羊肌肉、肝脏、肾脏和血液以及绦虫寄生虫（扩展孟氏绦虫）中的金属含量。研究了绦虫感染扩展孟氏绦虫和同时铅暴露对宿主肾脏、肝脏、肌肉、血液和绦虫中重金属浓度的影响。绦虫中的铅浓度平均比宿主肌肉、肝脏和肾脏中的铅浓度高 458、5 和 4 倍。与未感染的同种绵羊相比，寄生绵羊组织中的铅积累显著减少（ANOVA 检验，P < or = 0.05）。宿主组织和绦虫之间的差异也具有显著性（ANOVA 检验，P < or = 0.05）。因此，本研究表明，铅积累也发生在寄生哺乳动物的绦虫中。绵羊-扩展孟氏绦虫宿主-寄生虫系统似乎是一种有用且有前途的生物指示系统，特别是在农业（农村、农业）和自然生态系统中。
