Pappas P W, Wardrop S M
Department of Zoology, The Ohio State University, Columbus, OH 43210-1293, USA.
J Helminthol. 1997 Mar;71(1):57-9. doi: 10.1017/s0022149x00000808.
Faecal pellets were collected from uninfected rats and rats infected with Hymenolepis diminuta, and analysed for caloric value, lipids, carbohydrates, glucose, amino acids, and proteins. Faeces from infected rats contained significantly more lipid and less carbohydrate and glucose than faeces from control rats. The total free amino acid content of faeces from infected and control rats did not differ, but there were significant differences in the amounts of individual free amino acids. The data support the hypothesis that the nutrient composition of faeces from infected and control hosts differ. Beetles that serve as the intermediate host for H. diminuta may be able to detect these differences, and this may explain why beetles preferentially ingest faeces containing the tapeworm s eggs.
从未感染的大鼠和感染微小膜壳绦虫的大鼠收集粪便颗粒，并分析其热量值、脂质、碳水化合物、葡萄糖、氨基酸和蛋白质。感染大鼠的粪便中脂质含量显著高于对照大鼠，而碳水化合物和葡萄糖含量则低于对照大鼠。感染大鼠和对照大鼠粪便中总游离氨基酸含量没有差异，但个别游离氨基酸的含量存在显著差异。这些数据支持了以下假设：感染宿主和对照宿主粪便的营养成分不同。作为微小膜壳绦虫中间宿主的甲虫可能能够检测到这些差异，这或许可以解释为什么甲虫优先摄取含有绦虫卵的粪便。
