虎源H5N1亚型禽流感病毒感染小鼠模型的建立

Mice as a Model for Studying the Avian H5N1 Influenza Virus in Mammals

为研究H5N1亚型禽流感病毒的病原特性、致病机理及对其疫苗与救治药物效果评价提供平台,利用本室分离鉴定的虎源A/Tiger/Harbin/01/2002株(简称HAB/01)H5N1亚型禽流感病毒进行连续10倍稀释后,对4～6周龄雄性BALB/c小鼠经乙醚麻醉后进行滴鼻攻毒,每个稀释度接种10只实验小鼠,测定其MLD50,检测小鼠感染、致病的多项指标,观察期为14d。结果感染小鼠呈现出规律的以肺炎为主的临床症状、病理变化及病死率;测得该病毒对小鼠的MLD50为10-7.1/0.05mL。成功建立了虎源H5N1亚型禽流感病毒感染BALB/c小鼠的实验模型。

The rationale of this study was to elucidate the etiological agent characteristics and pathogenic mechanisms of the Avian H5N1 influenza virus in mammals, and to offer a platform for evaluating vaccines and drugs against AIV. Male BALB/c mice （18-20g） were anesthetized by inhalation of ether and inoculated intranasally with 0.05mL of infectious virus （A/Tiger/Harbin/01/2002） isolating from a tiger. The dose lethal to 50% of mice （MLD50） was determined by infecting groups of ten with serial 10-fold viral dilutions. Mice were observed daily for 14 days for clinical signs of infection and day of survival. The mice showed the typical clinical symptoms, pathological changes and death rates. The MLD50 was about 10-7A/0.05mL. The data demonstrate that infecting BALB/c mice with the avian HSN1 could serve as a successful model to assess viral infectivity.