Behrens A C, Nollen P M
Department of Biological Sciences, Western Illinois University, Macomb 61455.
Parasitol Res. 1993;79(1):28-32. doi: 10.1007/BF00931214.
Echinostoma caproni eggs developed fully formed miracidia from hamster-source eggs in 9 days and from mouse-source eggs in 10 days under either light or dark conditions at 27 degrees C. Incubation of egg cultures under constant light resulted in miracidial hatching from hamster-source eggs in 11 days and from mouse-source eggs in 13 days. Exposure to light was essential to trigger hatching, with incandescent light providing more consistent stimulation than fluorescent light. A majority of the miracidia hatched at between 1100 and 1600 hours, indicating a diurnal circadian pattern. Eggs stored in a dark environment for 11 days required 6 days to reach maximal hatching after exposure to light. Eggs stored for 46 and 56 days hatched on the same day of their exposure to light. Miracidia that hatched after 56 days of dark storage exhibited aberrant swimming behavior; those stored in a dark environment for 70 days or longer did not hatch when exposed to light.
卡氏棘口吸虫卵在27摄氏度的光照或黑暗条件下，源自仓鼠的卵在9天内发育出完全成形的毛蚴，源自小鼠的卵在10天内发育出完全成形的毛蚴。在持续光照下培养卵，源自仓鼠的卵在11天内毛蚴孵化，源自小鼠的卵在13天内毛蚴孵化。光照对于触发孵化至关重要，白炽灯提供的刺激比荧光灯更稳定。大多数毛蚴在1100至1600小时之间孵化，表明存在昼夜节律模式。储存在黑暗环境中11天的卵在光照后需要6天才能达到最大孵化率。储存46天和56天的卵在光照当天孵化。黑暗储存56天后孵化的毛蚴表现出异常的游动行为；储存在黑暗环境中70天或更长时间的卵在光照时不孵化。
