纳洛酮治疗病毒性脑炎30例临床观察

对30例病毒性脑炎昏迷病儿，在常规治疗基础上加用纳洛酮，结果辅用纳洛酮治疗病毒性脑炎的疗效明显优于对照组（P＜0．01）：治疗组与对照组平均住院天数分别为11．3±2．07天，14．2±0．86天（P＜0.05）有显著性差异。     

儿童病毒性脑炎脑电图分析

目的:探讨脑电图(EEG)对儿童病毒性脑炎的诊断价值.方法:采用国产PRD-2000A型数字化脑电图定量分析仪,对60例临床拟诊为病毒性脑炎患儿进行EEG检查.结果:60例患儿正常8例(13.3%),异常52例(86.7%).结论:EEG在对本病诊断上优于其他医学影像技术,显示其良好的反应性和诊断的敏感性,有助于对本病的早期诊断.     

The influence of cold or isolation stress on resistance of mice to West Nile virus encephalitis

Summary The effect of cold or isolation stress on mortality rate and brain virus level were investigated in mice infected with West Nile virus (WNV). Exposure of mice for 5 min/day to cold water (1±0.5°C) for 8–10 days resulted in 92% mortality as compared to 47% in control mice (p<0.001). Mice housed in individual cages (isolation stress) were also more susceptible to WN viral infection, as shown by increased mortality rate reaching 85% as compared to 50% in mice housed 6 per cage (p<0.01). Cold or isolation stress increased blood brain and spleen virus levels as early as 2 days after inoculation. After 8 days of isolation or cold stress, mice inoculated with WNV had 8.9 and 9.0 log₁₀ plaque forming units in the brain, respectively, as compared to 6.9 in the control (p<0.01–0.001). Furthermore, lymphoid organs such as spleen and thymus showed severe mass loss. These data suggest that physical or non-physical stress situations enhance WNV encephalitis by accelerating virus proliferation and increase mortality in mice.     

森林脑炎自然疫源地区划研究

在分析森林齄炎分布与生境特征、媒介及宿主的基础上，探讨我国森林脑炎自然疫源地区划和防治措施．     

乙型脑炎病毒(JEV)免疫荧光(IFA)检测方法的建立

目的建立乙型脑炎病毒(JEV)免疫荧光(IFA)检测方法,应用于猪及猪源性生物材料JEV的检测。方法滴定病毒TCID50,筛选JEV敏感细胞,依据国标IFA法制备抗原片,并进行特异性、敏感性和稳定性试验。结果选取BHK21细胞作为JEV敏感细胞,病毒感染力滴度(TCID50)为10-8.9.mL-1;与猪瘟病毒(CSFV)、猪细小病毒(PPV)均无交叉反应;稳定性和敏感性试验显示,不同时间IFA检测灵敏度均为1∶2560;可检测到的病毒滴度最低为10-6.5.mL-1。结论建立的IFA法敏感性、特异性强,稳定性好,可用于猪及猪源性生物材料JEV的检测。     

猪病毒性脑心肌炎的诊断与防制

对一猪场的病猪进行了临床检查、免疫学检测、病理解剖及组织学观察,结果表明：经ELISA脑心肌炎病毒抗原检测,抗原阳性;临床检查显示急性出血性热性败血症、不典型神经症状;组织学检查显示急性心肌炎、非化脓性脑炎、急性出血性淋巴结炎;结论为猪病毒性脑心肌炎。     

Evidence for hydrogen-deuterium exchange in viral particles

Heavy water (D2O) could enhance thermostability of some viruses. However, the underlying mechanism is not clear. Here we report the development of a matrix-aided gas-isotope-ratio mass spectrometry method that allows direct determination of deuterium/hydrogen (D/H) ratio in D2O-treated Japanese encephalitis virus (JEV), hepatitis A virus (HAV) and RNA from D2O-treated HAV. The D/H ratiowas expressed as δDSMOW. Our experiments showed that δDSMOW values increased significantly in D2O-treated viral samples compared to normal controls, and increment in δDSMOW of D2O, treated viral samples was in a fine linear relationship with increment in amount of samples loaded in BSA matrix. Our experiments also indicated that increased δDSMOW of D2O-treated virus correlated well with its enhanced thermostability. The results suggested that hydrogen-deuterium exchange occurred in viral particles and its RNA structure as a result of D2O-treatment. Furthermore,such exchange could cause changes in viral phenotype, such as enhanced thermostability.     

Non-viraemic transmission of tick-borne encephalitis virus: a mechanism for arbovirus survival in nature

The vectors of arthropod-borne viruses (arboviruses) become infected by feeding on the viraemic blood of an infected animal. This theory is based on transmission studies involving artificial infection of vertebrate hosts by syringe inoculation. To reproduce natural conditions of virus transmission, infected and uninfected vectors (ticks) of tick-borne encephalitis virus, the most important arbovirus in Europe, were allowed to feed together on uninfected wild vertebrate hosts. The greatest numbers of infected ticks were obtained from susceptible host species that had undetectable or very low levels of viraemia. The results suggest that nonviremic transmission is an important mechanism for the survival of certain arboviruses in nature.     

森林脑炎对血清补体C3、C4水平影响及临床意义

目的:检测森林脑炎患者血清补体C3、C4水平变化,了解森林脑炎免疫反应情况.方法:选择94例确诊的森林脑炎患者作为实验组,选择30例正常人群作为对照组.根据病情轻重将实验组分为轻组和中重组.采用散射比浊法检测补体C3、C4水平,并对结果进行统计学分析.结果:(1)实验组与对照组比较,补体C3水平变化有显著性差异(P＜0.01);补体C4水平变化无明显差异(P＞0.05).(2)轻组与中重组比较,补体C3水平变化有差异(P＜0.05);补体C4水平变化无明显差异(P＞0.05).结论:森林脑炎可导致补体C3水平降低,补体C3水平可以反映森林脑炎病情严重程度;森林脑炎对补体C4无明显影响.     

56例小儿急性病毒性脑炎脑脊液、脑电图与CT结果分析

通过对56例小儿急性病毒性脑炎患者的脑脊液、脑电图及CT检查结果分析，观察其对病毒性脑炎的诊断价值．结果脑电图及CT检查可为小儿病毒性脑炎的诊断与鉴别诊断提供重要依据．因此认为在临床上对高度疑诊病毒性脑炎者应同时进行脑脊液、脑电图及头颅CT检查，有助于早期诊断．