Choi Dong Wik, Chung Byung Joo
Department of Parasitology, Kyungpook National University, School of Medicine, Taegu, Korea.
Kisaengchunghak Chapchi. 1975 Dec;13(2):133-138. doi: 10.3347/kjp.1975.13.2.133.
Studies were conducted in rivers in Kyungpook Province, Korea from July 1970 to September 1974 to determine the stations where Parafossarulus manchouricus, the intermediate snail host of Clonorchis sinensis, are abundant, and the infection rates of these snails with the cercaria of Clonorchis sinensis. Snail collections were made during four consecutive summers(July to September in each year). Ten snail habitats were found. The population density of the snails per square meter of the river bottom ranged from 25 to 250. The highest population of snails was encountered at the Dong-chon station. Cercaria studies by means of the immersing and crushing technics indicated surprisingly low rate of Clonorchis sinensis infection among the snails examined. The proportion of infected snails in Kyungpook Province was 0.8 per thousand of all snails examined. Results indicated that the Parafossarulus manchouricus exists in limited areas within the rivers under study and the infection of the snail with the cercaria of Clonorchis sinensis is very low.
1970年7月至1974年9月期间，在韩国庆尚北道的河流中开展了多项研究，以确定中华肝吸虫中间宿主东北黑螺大量存在的站点，以及这些螺感染中华肝吸虫尾蚴的比率。在连续四个夏天（每年7月至9月）采集螺类样本。共发现10个螺类栖息地。河底每平方米的螺类种群密度在25至250只之间。在东川站点发现的螺类数量最多。通过浸泡和压碎技术进行的尾蚴研究表明，在所检查的螺类中，中华肝吸虫的感染率出奇地低。庆尚北道受感染螺类的比例为每千只检查螺类中有0.8只。结果表明，东北黑螺存在于所研究河流的有限区域内，且螺类感染中华肝吸虫尾蚴的情况非常少见。
