ABSTRACT
Paragonimus westermani in the Philippines has been reconfirmed to develop to sexual maturity in albino rats. The migration route of this species in albino rats have also been studied in detail and compared with that of Paragonimus westermani in Japan in ratsAs the result it was found that the course of migration of the larvae of Philippine P. westermani in rats was quite different from that of Japanese P. westermani in ratsIt has shown that it is possible to differentiate the species of Paragonimus westermani in the Philippines and Japan by means of immunoserological techniques such as compliment fixation test, double diffusion test and immunoelectrophoresis. The Philippine P. westermani from Japanese P. westermani not only morphology but also biological and immunological chararcteristics, therefore we reiterate the new name paragonimus philippinensis, (Ito, 1978) Philippine P. westermaniA new theory by Miyazaki (1977) concerning the taxonomy of Paragonimus westermani is also discussed. (Summary)
Subject(s)
Animals , Disease Reservoirs , Fertilizers , Health Education , Humans , Japan , Molluscacides , Sanitation , Schistosomiasis/diagnosis , Schistosomicides/therapeutic use , Sewage , Swimming Pools , Water SupplySubject(s)
Alcohol Drinking , Brain Diseases/physiopathology , Carcinoma, Hepatocellular/complications , Chronic Disease , Electroencephalography , Female , Humans , Japan , Liver/pathology , Liver Neoplasms/complications , Male , Schistosoma/isolation & purification , Schistosomiasis/complications , Species Specificity , Splenomegaly/complicationsABSTRACT
There has been a temporary increase in schistosomiasis japonica after World War II in each of the known endemic areas, but a national control programme, including use of molluscicides, lining irrigation ditches through rice paddies with concrete and the reclamation of swampy areas by drainage and filling, begun around 1950, drastically reduced the prevalence and distribution of the disease. It can be said that these measures together with improvements in agricultural techniques, mechanization of farming and also socioeconomic factors such as improvements in the living standards of the inhabitants and urbanization have brought about a rapid decrease in schistosomiasis in Japan.