The oil-emulsion,propolis and 603 nanometer inactivated vaccines of Japanese encephalitis virus GZ0409-31 strain from swine were prepared and compared by sterility and safety test. Mice immunized with these inactivated vaccines displayed effective immune protection that testifies their safety. The groups of mice immunized with the oil-emulsion and 603 nanometer inactivated vaccines had higher antibody titer until 90 days post inoculation whereas the group of mice immunized with attenuated Japanese encephalitis vaccine had lower antibody titer. In addition the level of IFN-γwas higher in the group of mice immunized with attenuated Japanese encephalitis vaccine than those groups with inactivated Japanese encephalitis vaccines. The group of mice immunized with 603 nanometer inactivated Japanese encephalitis vaccines expressed higher level of IFN-γthan those other inactivated Japanese encephalitis vaccines. Mouse immunized with the oil-emulsion ,propolis and 603 nanometer inactivated vaccines could be protected from the infection of GZ0409-31 Japanese encephalitis virus with 100％ protection rate in case of oil-emulsion and 603 nanometer inactivated vaccines immunized groups but remained 70％ in propolis inactivated vaccines immunized groups. The attenuated Japanese encephalitis vaccine also provided 100％ (10/10) protection rate. The oil propolis and 603 nanometer inactivated GZ0409-31 Japanese encephalitis vaccines were prepared and found to be safe and effective.%以GZ0409-31株乙脑强毒株作为抗原与白油佐剂、蜂胶佐剂、603纳米佐剂制备灭活疫苗,并对疫苗做了无菌检验和安全检验,灭活疫苗接种小鼠后均未出现不良反应,安全性良好.将制备的乙脑灭活疫苗免疫小鼠,并且与市售乙脑弱毒活苗作对比.结果显示,白油佐剂灭活苗组和603纳米佐剂灭活苗组在第90d抗体效价还维持在较高的水平,同期的弱毒活苗组抗体较低;弱毒活苗组IFN-γ含量较灭活苗组高,其中603纳米佐剂灭活苗组IFN-γ含量较其他灭活苗组高.用乙脑病毒强毒对免疫小鼠进行感染,白油佐剂灭活苗和603纳米佐剂灭活苗对小鼠的保护率均为100%(10/10),蜂胶佐剂灭活苗对小鼠的保护率为70%(7/10),对照组市售乙脑弱毒活苗对小鼠的保护率为100%(10/10).表明制备白油佐剂灭活苗和603纳米佐剂灭活苗对小鼠的保护率高,无排毒散毒危险.
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