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From: 2007 2 Slide 2 Control Diagnosis Symptoms Epidemiology Life cycle Morphology Introduction Schistosoma Lesions Slide 3 Introduction Schistosoma japonicum: in the portal vein system( ) and the mesenteric veins( ) of human,cattle,goats,pigs,dogs,cats and rodents animals( ) Slide 4 Morphology The adults are dioecism . Long cylindrical . The oral sucker is at the tip. The posterior sucker is at the base and it is bigger. Slide 5 Life cycle Intermediate hosts Oncomelenia e.g.planorbid snails final hosts human,cattle,goat s,pigs,dogs,cats the rodents animals( ) Slide 6 Intermediate hosts(Oncomelenia) Intermediatehosts( Oncomelenia ) Final hosts (sensitive animals) Worm mainly distributed in the liver and colon wiggle organization, ovum mature, intestinal mucosa miracidium fall into the worm contains fluctuate, with its droppings in vitro. Containing worm eggs feces polluted water, in suitable conditions, miracidium eggs hatch within. miracidium in water meet appropriate intermediate host snail, invading screw body and gradually development. Cysticercosis mature after leaving correlativity, often distribution in the surface layer and water containing people or animals and cysticercosis water after contact through skin and cysticercosis infection. In the final host they gradually mature mating spawn Slide 7 Epidemiology the infection rate high the infection intensity large t the south China: perennial infection t the north hina: the infections mainly in May to October The disease popular in China, Japan, the Philippines, and so on. in the Yangtze river basin and thirteen provinces south of the Yangtse River Slide 8 Symptoms t the Schistosoma japonicum of a large/few number adults cause (acute process) inappetence,depression, move slowly fever,diarrhea,tenesmus pale mucosa,edema,emaciation (chronic process) indigestion develop slowly Slide 9 Lesions liver Tumescence , hepatatrophia ( ) sclerosis ( ) intestinal wall: Thicken Rough surface Egg granulomata ( ) Slide 10 Diagnosis pathogenic examination ( ) immunological test ( ) Stool examination examination of eggs in feces IHA ELISA DDIA Slide 11 Control Treatment Prevention destrucetion of snails( ) Praziquantel ( ) Amosconate,7505 ( ) Deptarax ( ) Hexachloroparaxylence ( ) Slide 12 The end