Kong Y, Yang H J, Cho S Y
Department of Parasitology, College of Medicine, Chung-Ang University, Seoul, Korea.
Korean J Parasitol. 1994 Dec;32(4):277-80. doi: 10.3347/kjp.1994.32.4.277.
In the definitive hosts, metacercariae of Paragonimus westermani excyst in host duodenum, penetrate intestinal wall, migrate peritoneal and thoracic cavities, and develop to sexual maturity in 8 weeks. This study was undertaken to examine the age of the maturing P. westermani when their infectivity to the other definitive hosts was retained. On 3, 7, 10, 14, 21 and 28 days after feeding the metacercariae to cats through a gastric tube, the developing worms were harvested. The juveniles of different age were fed again to other experimental cats. One to 12 weeks after the oral-transfer infections, the experimental cats were examined for establishment of infections. In the cats to which 3-day and 7-day old juveniles (grown up to 1.4 mm long) were fed, 31.4% and 22.6% of the transferred worms were found infected. The worms of 10-28 days old were not infective. Early maturing stages grown up to 7 days maintained their infectivity to the other definitive hosts.
在终末宿主中，卫氏并殖吸虫囊蚴在宿主十二指肠内脱囊，穿透肠壁，移行至腹腔和胸腔，并在8周内发育至性成熟。本研究旨在检测发育中的卫氏并殖吸虫在保持对其他终末宿主感染性时的年龄。通过胃管将囊蚴投喂给猫后，在第3、7、10、14、21和28天收集发育中的虫体。将不同年龄的幼虫再次投喂给其他实验猫。经口转移感染后1至12周，检查实验猫是否感染。在投喂3日龄和7日龄幼虫（长至1.4毫米）的猫中，分别有31.4%和22.6%的转移虫体被发现感染。10至28日龄的虫体无感染性。发育至7天的早熟阶段虫体对其他终末宿主仍保持感染性。
