Yan T, Li G
Department of Parasitology, Jiangxi Medical College, Nanchang 330006.
Zhongguo Ji Sheng Chong Xue Yu Ji Sheng Chong Bing Za Zhi. 1999;17(6):370-3.
To observe the biological characteristics of the juvenile of Paragonimus westermani.
Kunmin strain mice and Wistar rats inoculated orally with 100-150 metacercariae of Paragonimus westermani were autopsied 10-30 days and 80-580 days after infection, respectively. Life-span, survival time in dead hosts or physiological saline at 5 degrees C to 8 degrees C and invasiveness of juveniles to new hosts were detected by host transfer.
All the worms recovered from the mice and rats were stunted juveniles. The worm detection rates in the mice and rats were 19.3% and 22.2%-37.5%, respectively. The life-span of the juveniles was rather long, being not limited by the life-span of a host. Host transfer could prolong longevity and preserve invasiveness. The juveniles recovered from dead mice still possess strong vitality and invasiveness.
The juvenile of P. westermani is an infective stage, having strong vitality and invasiveness.
观察卫氏并殖吸虫童虫的生物学特性。
分别于感染后10 - 30天和80 - 580天剖检经口接种100 - 150条卫氏并殖吸虫囊蚴的昆明系小鼠和Wistar大鼠。通过宿主转换检测童虫的寿命、在死宿主或5℃至8℃生理盐水中的存活时间以及对新宿主的侵袭力。
从小鼠和大鼠体内回收的均为发育受阻的童虫。小鼠和大鼠的检虫率分别为19.3%和22.2% - 37.5%。童虫寿命较长，不受宿主寿命限制。宿主转换可延长其寿命并保持侵袭力。从死鼠体内回收的童虫仍具有较强活力和侵袭力。
卫氏并殖吸虫童虫是感染期，具有较强活力和侵袭力。
