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已知呼吸道合胞体病毒(RSV)和副流感病毒是下呼吸道疾病(LRD)的重要病原体。1975～1976年,在休斯敦市一所医院的住院患儿中检出流感病毒甲/维多利亚/3/75(H_3N_2)株,检出率超过RSV和其他病毒,结果如下: (1)与LRD有关病原体的检出情况:在10个月中观察297名住院儿童,其中210名为肺炎,34名为喉炎,40名为细支气管炎,12名为气管支气管炎或百日咳样综合征。148人(49.8%)检出至少一种病原体。喉炎和气管支气管炎的检出率分别为69%和67%;肺炎和细支气管炎的检出率仅为46%和48%,如做衣原体培养,后两种疾病中可能有阳性检出。1/3病例在1～2月入院,当时正是RSV和甲型流感流行期。在所有观察对象中,33例(11.1%)分离到RSV;42例(14.1%)分离到甲型流感病毒维多利亚
Respiratory syncytial virus (RSV) and parainfluenza virus are known to be important pathogens of lower respiratory tract disease (LRD). From 1975 to 1976, influenza virus A / Victoria / 3/75 (H_3N_2) was detected in infants hospitalized in a hospital in Houston. The detection rate was higher than that of RSV and other viruses. The results were as follows: (1) Pathogen detection: 297 hospitalized children were observed in 10 months, 210 of whom were pneumonia, 34 were laryngitis, 40 were bronchiolitis and 12 were tracheobronchitis or pertussis-like syndrome. 148 (49.8%) detected at least one pathogen. The detection rates of laryngitis and tracheobronchitis were 69% and 67% respectively. The detection rates of pneumonia and bronchiolitis were only 46% and 48%, respectively. For example, in Chlamydia pneumoniae culture, positive detection of the latter two diseases . One-third of patients were admitted to hospital from January to February, when RSV and influenza A were prevalent. Among all the subjects, RSV was isolated in 33 (11.1%) and influenza (A) in 42 (14.1%) in Victoria