血吸虫病（schistosomiasis）.doc

血吸虫病（schistosomiasis） Chapter 11: schistosomiasis Schistosomiasis (schistosomiasis) is referred to in our country as a result of Japanese schistosomiasis in the portal system of the human body A parasitic disease. Through the transmission of the snail, the human body is infected by the contact with the disease of the cercaria, which is mainly caused by the eggs. Clinical acute phase with fever, hives, hepatomegaly, the blood acidophilous cells increased to the main characteristic, slow sex with diarrhea Or dysentery diarrhea, liver splenomegaly is the main performance, late development is hepatic fibrosis. Schistosomiasis is a great hazard to human and animal health. According to the initial investigation, there are more than 10 million patients nationwide Jiang and 380 counties (cities) in 12 provinces south of China. Since the founding of new China, the work of combating schistosomiasis has been enormous As a result, 121 counties (cities) have not yet been controlled, and in recent years some places have reignited. To eliminate schistosomiasis throughout the country, And keep doing a lot of work. (etiology) Schistosomiasis japonicus is the main parasite in the portal vein system of the host, male and female, to the intestinal wall The small venous end lays eggs, some of the eggs wear the wall of the intestine, excrete in the stool, the rest of the eggs or remain in the intestinal wall or with the door Vein blood flows into the liver. In the water, the eggs are incubated in the water for several hours to 24 hours It continues to develop into cercaria, and the cercaria can escape into the water from the conch, and it can live up to 3 days. When humans or livestock are exposed to the disease, cercaria is made The skin invasion develops into the child worm, the child worm develops into adult in the portal vein system. (epidemiology) There are five species of schistosomiasis parasitic on the human body, namely schistosomiasis japonicus, schistosomiasis, Egyptian schist