Dempster S J, Rau M E
Institute of Parasitology of McGill University, Macdonald College, Ste. Anne de Bellevue, Quebec, Canada.
J Parasitol. 1991 Feb;77(1):111-2.
The prevalence and intensity of experimental infections of Aedes aegypti with the digenean Plagiorchis noblei increased significantly with the level of trickle exposure to cercariae. Daily exposure to doses of 16 cercariae/day yielded a mean infection intensity of 13.0 metacercariae; doses of 1 cercaria/day resulted in only 2.4 metacercariae per infected mosquito larva. The prevalence of infection rose from 46% at an exposure of 1 cercaria/day to 99% at 16 cercariae/day. Host mortality rose concomitantly from 25% to 88%. Host mortality and parasite acquisition were independent of environmental temperatures (21-29 C), despite the fact that developmental times, and consequently the number of daily exposures, were more than 50% greater at the low end of the temperature scale. This may be attributable to low activity of mosquito larvae and the resulting decrease in the number of encounters with cercariae.
埃及伊蚊感染复殖吸虫高贵斜睾吸虫的实验感染率和感染强度随尾蚴滴注暴露水平的增加而显著升高。每天暴露于16条尾蚴/天的剂量时，平均感染强度为13.0个后尾蚴；每天1条尾蚴的剂量导致每只受感染的蚊虫幼虫仅产生2.4个后尾蚴。感染率从每天暴露1条尾蚴时的46%上升到每天暴露16条尾蚴时的99%。宿主死亡率也随之从25%上升到88%。尽管在温度范围较低端时发育时间以及因此每天的暴露次数增加了50%以上，但宿主死亡率和寄生虫感染率与环境温度（21-29摄氏度）无关。这可能归因于蚊虫幼虫活动能力低，以及由此导致的与尾蚴接触次数减少。
