目的 了解儿童急性下呼吸道感染（ALRTI）病毒病原学特点。
Objective To investigate the viral pathogens of lower respiratory tract infection (ALRTI) in children.
结论本次调查新生儿肺炎病原以病毒多见，新生儿肺炎临床症状不典型，难以依靠临床表现作出病原学诊断。
Conclusion Virus is the most common agent for newborn pneumonia and aetiology diagnosis of newborn pneumonia cannot be presumed only by clinical manifestations.
文章介绍了诺瓦克样病毒的病原学、流行病学、临床表现和诊断检测等方面的研究进展。
This article briefly introduces the progress of the pathogeny, epidemiology, clinical characteristics, diagnosis, treatment and detection of Norwalk Virus.
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