Hallas Gary, Bull C Michael
School of Biological Sciences, Flinders University, G.P.O. Box 2100, Adelaide, SA, Australia 5001.
J Parasitol. 2006 Feb;92(1):192-4. doi: 10.1645/GE-3531RN.1.
Two pharyngodonid nematode species, Pharyngodon tiliquae and Thelandros trachysauri, infect the Australian lizard Egernia stokesii (gidgee skink) in populations from South Australia. Eggs are detected in lizard scats that are deposited in piles outside the rock crevice refuges that the lizards occupy. Eggs were isolated by salt flotation from fresh scats and from scats that had been dried in simulated field conditions for 7, 14, 21, and 28 days. Egg counts decreased with drying time for both nematode species, but T. trachysauri eggs were still detected after 28 days of drying, whereas P. tiliquae eggs were rarely detected after 14 days. These results suggest that egg counts can be used to infer host infection status only from relatively fresh scats and that eggs of the 2 species persist in a state where they can be detected by standard flotation techniques, for different times.
两种咽口线虫，即蒂氏咽口线虫（Pharyngodon tiliquae）和糙鳞蜥咽口线虫（Thelandros trachysauri），感染了来自南澳大利亚种群的澳大利亚蜥蜴斯托克斯氏石龙子（Egernia stokesii，即吉吉石龙子）。在蜥蜴栖息的岩石裂缝避难所外堆积的蜥蜴粪便中可检测到虫卵。通过盐浮选法从新鲜粪便以及在模拟野外条件下干燥7、14、21和28天的粪便中分离出虫卵。两种线虫的虫卵计数均随干燥时间减少，但糙鳞蜥咽口线虫的虫卵在干燥28天后仍可检测到，而蒂氏咽口线虫的虫卵在14天后很少能检测到。这些结果表明，虫卵计数仅可用于从相对新鲜的粪便中推断宿主的感染状况，并且这两种线虫的虫卵在不同时间内以可通过标准浮选技术检测到的状态持续存在。
