方法用流行病学观察法进行监测。 实验用人胚肾细胞培养方法分离病毒。
Methods Epidemiological observation and experiment of isolating virus through culture of human embryo kidney cell were used in this study.
考虑的具体流行病学观察包括与时间和地点紧密相关的包括更大年龄跨度的轻型病症和逐渐增多的群组病例。
The specific epidemiological observations considered included milder disease across a broader age spectrum and a growing number of clusters of cases, closely related in time and place.
介绍了奶牛附红细胞体病的流行病学、临床症状、化验室诊断、治疗、疗效观察及其预防措施。
The epidemiology, clinical symptoms, laboratory diagnosis, treatment, observation of curative effect and preventive measures of cow eperythrogoonosis were introduced.
Now the epidemiology studies are observational studies.
流行病学研究是观察性研究
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