Abstract: Objective To study on systematic classification and experimental research on host animals of Paragonimus in Jiangxi Province. Methods Classification and definition of the 1st and 2nd intermediate host of Paragonimus were carried out by using morphological study. Detection of the diapause adolescent of Paragonimus in boar’s organs,such as liver, was doen by using normal saline-releasing technique. By using Erinaceus europaeus and mice as animal models of Paragonimus experiment respectively, animal infection was performed with encysted metacercaria of Paragonimus orally in order to process the host conversion with direct and indirect paratenic transmission. Results We discovered and confirmed that there were 17 different species of 1st intermediate host of in Paragonimus Jiangxi， covering 2 families and 3 genera， and 23 different species of 2nd intermediate host， covering 1 order， 1 family and 3 genera， 15 of which were reported to be new species by the authors. Furthermore， a new genus of Jiangxi Huananpotamon was built up， based on the assumption that Wuyi mountain range is the developing centre of Huananpotamon， and tend to spread out towards Jiulian mountain of Nanling mountain range adjacent to Guangdong Province and Luoxiao mountain range next to Hunan Province. In addition， Jiangxi Province freshwater crab order was created at the end of research， as well as a complete classification and retrieval table of its order and genus. The authors also proved that the advantageous stocks of freshwater crabs carrying encysted metacercaria of Jiangxi Paragonimus westermani were Sinopotamon fukiense and S.wanzaiense. More importantly， research and analysis on zoogeography of Jiangxi freshwater crabs have been done， and geography division table of intermediate hosts of Jiangxi Paragonimus is completed. At last， this research has proved that Sus scrofa is the natural paratenic host of Jiangxi Paragonimus westermani， and Erinaceus europaeus is used to be the experimental paratenic host and animal model for Jiangxi Paragonimus westermani， for the first time. Conclusion There are many endemic areas of Paragonimus in Jiangxi Province, however, the distribution of Paragonimus has been gradually limiting to mountainous areas. Constitution and distribution of freshwater crabs have close relationship with altitude, terrain features, and movements of water in the area. Wild rodent animal may contribute to the maintenance and expansion of the endemic areas of Paragonimus.

Key words: Paragonimus, Intermediate host, Paratenic host, Animal model, Jiangxi Province