流行性乙型脑炎xiaojunqi（Japanese encephalitis xiaojunqi）.docVIP

流行性乙型脑炎xiaojunqi（Japanese encephalitis xiaojunqi） Chapter 7 Japanese encephalitis Epidemic encephalitis B (epidemicencephalitis B), referred to as encephalitis B, is caused by encephalitis B virus and is characterized by brain inflammation An acute infectious disease characterized by major lesions. The disease is spread by mosquitoes and is prevalent in summer and fall. Most of the patients are children. Clinical main table It is urgent to have high fever, consciousness disorder, convulsion, pathological reflection and meningeal stimulation sign. Severe patients with respiratory failure, and Sequelae of the nervous system. Japanese encephalitis virus is a type of Arbovirus in the B group, a togavirus. The virus is spherical, with diameters ranging from 20 to 30nm, with a core of Single stranded RNA, the outer layer of lipid coating, and its surface is hemagglutinin. Encephalitis B virus is a nerve virus, which is often inoculated in the brain of suckling mice Virus isolation. Encephalitis B virus resistance is not strong, easy to kill by commonly used disinfectant, not acid, heating 56 degrees 30min after can Inactivated, but resistant to low temperature, preserved in 50% glycerin for 3 months at 4. First, the infectious source encephalitis B is a zoonotic disease of natural foci, both human and animal can become the source of infection. domestic The investigation of the natural infection rate of domestic animals and poultry shows that the piglets who have not been in the epidemic season are the main infectious sources of the disease. Usually in In the first 2 to 4 weeks of the epidemic, the disease spread widely through the mosquito, pig, and mosquito cycle in pigs, with mosquito density and infection The disease rate was significantly higher, and the disease was prevalent among the population. Patients and latent infections are of little significance as a source of infection. Two, the transmission route, the disease mainly through mosquito bites and spread. Culex,