卫氏并殖吸虫和斯氏狸殖吸虫感染禽、蛙及宿主转换的研究

目的 :探讨卫氏并殖吸虫和斯氏狸殖吸虫在禽、蛙体内的分布与发育 ,以及童虫对终宿主的侵袭力。方法 :从江西、广东两省并殖吸虫流行区采集溪蟹 ,分离囊蚴。以每只动物 30 -2 0 0个囊蚴分别感染雏鸡、雏鸭、鹌鹑、鹦鹉和蛙 ,定期剖检。将禽、蛙体内所获童虫经口感染犬或猫 ,60 d后剖检 ,观察虫体发育情况。结果 :两种并殖吸虫均可在鸡、鸭、鹌鹑和鹦鹉体内存活 ,虫体分布于体腔、肝脏、肺和肌肉。所有虫体为小型滞育童虫。斯氏狸殖吸虫对蛙的感染率为 1.7%- 4 0 .0 % ,未查见卫氏并殖吸虫感染蛙。童虫经宿主转换后 ,在犬、猫胸腔或肺虫囊内检获虫体 ,除部分为成熟前期虫体外 ,多数为含卵成虫。结论 :在流行区 ,禽和蛙在人体并殖吸虫病传播中的作用 ,应予重视。

STUDIESON EXPERIMENTAL INFECTION AND HOST TRANSFER OF FOWLSAND FROGSWITH PARAGONIMUS WESTERMANI AND PAGUMOGONIMUS SKRJABINI

AIM:To explore the distribution and development of Paragonimus westermani and Pagu- mogonimus skrjabini in fowls and frogs in addition to the invasiveness of the juveniles recovered from the above animals to cats or dogs.METHODS:Chickens,ducks,quails and parrots were infected orally each with30 - 2 0 0 metacercariae of Paragonimus westermani and Pagumogo- nimus skrjabini,respectively.Dogs or cats were infected with juveniles obtained from the above animals.RESULTS:Juveniles were obtained from body cavities,livers,lungs and muscles of fowls and frogs6 0 days after infection.Most of the juveniles were detected from the muscles buttheir developmentretarded.In 6 0 frogs infected with metacercariae of Paragonimuswester- mani,no worm was found.Infection rate of frogs infected with Pagumogonimus skrjabini was 1 .7% - 4 0 .0 % .After host transfer,juveniles developed well and matured in the thoracic cavi- ties or lung worm cysts of dogs or cats,but some prematured worms were also detected.CON- CLUSION:Attention should be given to the role of fowls or frogs in the transmission of human paragonimiasis in endemic area.