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呼吸道感染是人类最常见疾病之一,在小儿及集体单位可以引起不同程度的流行,甚致死亡。近年来国外学者对它的病原学做了很多研究工作,在探讨防治措施方面,也取得了一定的成绩。随着实验方法的不断改进,特别是广泛地应用了组织培养法,了解到在呼吸道感染中病毒占着越来越重要的位置。过去呼吸道感染的病原不少是原因不明,而其它则为细菌,病毒的比重很低或仅在某些病毒流行时发病率增高一些。但近年来则认为病毒的感染不但比重增加,病种也显得更为复杂。如1950年以前,仅知流感(A、B、C、三类)、鹦鹉热及原发性非典型肺炎几种病毒,但以后
Respiratory tract infection is one of the most common human diseases and can cause different degrees of epidemics and even death in children and collective units. In recent years, foreign scholars have done a lot of research on its etiology, and have made some achievements in exploring preventive measures. With the continuous improvement of experimental methods, especially the extensive application of tissue culture, it is understood that viruses occupy an increasingly important position in respiratory infections. In the past, many pathogens of respiratory infections were unknown and others were bacteria. The proportion of viruses was very low or only increased with some viruses. However, in recent years, it is thought that the infection of the virus not only increases the proportion but also makes the disease more complex. As of 1950, the only known flu (A, B, C, Class III), parrot fever and SARS several viruses, but later