Japanese encephalitis is also called epidemic encephalitis. The disease is an acute infectious disease caused by Japanese encephalitis virus, which affects the central nervous system. Japanese encephalitis is prevalent in Asia and Southeast Asia. Recently, cases of Japanese encephalitis have also appeared in Saipan, USA and mainland Australia.

Guiding opinions:

preventive measure

1. Strengthen the education of tourists and increase their awareness of self-protection.

2. Inoculate Japanese encephalitis vaccine to increase immunity.

3. Eliminating mosquitoes and preventing mosquito bites are the most effective ways to prevent Japanese encephalitis. Mosquito repellent cream containing DEET can be used for prevention. Schistosomiasis japonica is a parasitic infection of Schistosoma japonicum in portal vein system, which is infected by skin contact with infected water containing cercariae. The main pathological change is egg granuloma caused by egg deposition in intestine or liver. In the acute stage, there are fever, hepatomegaly and tenderness, abdominal pain, diarrhea and bloody stool. And the blood eosinophils increased significantly. In the chronic stage, hepatosplenomegaly or chronic diarrhea is the main manifestation; The late manifestations are mainly related to fibrosis around hepatic portal vein, such as splenomegaly and ascites. Schistosomiasis japonica has been prevalent in China for a long time. According to the fact that Schistosoma japonicum eggs were found in the female corpse of the Western Han Dynasty in Mawangdui, Changsha, Hunan Province and the male corpse of the Western Han Dynasty in Jiangling, Hubei Province, it was proved that schistosomiasis japonica was prevalent in the Yangtze River basin in China more than 2 100 years ago. The investigation in the early days of the People's Republic of China proved that it was popular in 373 counties (cities) in Jiangsu, Zhejiang, Anhui, Jiangxi, Hunan, Hubei, Guangdong, Guangxi, Fujian, Sichuan, Yunnan and Shanghai 12 provinces, cities and autonomous regions. The area of Oncomelania hupensis is 654.38 04.8 billion m2; In 12 provinces, municipalities and autonomous regions, more than 20,000 people were detected with120,000, of which about 40% were symptomatic patients, 5% were advanced patients, and the threatened population exceeded10 million. More than 65,438+200,000 sick cows were found. After more than 30 years of prevention and control, the epidemic situation of schistosomiasis in China has undergone tremendous changes. By 1988, three provinces and one city in Shanghai, Guangdong and Fujian have reached the standard of eliminating schistosomiasis, 263 counties (cities) have reached the standard of eliminating or basically eliminating schistosomiasis, and 1 10 counties (cities) are still in an epidemic state; The snail area in China is 3.46 billion m2; There are 435,000 patients and 44,465,438+0 cases of acute infection. However, in recent years, the area of Oncomelania hupensis has been stagnant and increasing. Anxious and sexy