Objective: To explore the different clinical characteristics of children infected with different subtype/genotype of human respiratory syncytial virus (HRSV) in Beijing. Methods: Respiratory specimens for positive HRSV were randomly collected from children with acute respiratory tract infection (ARTI) in the epidemic season of HRSV from November of each year to January of the next year during 2009 and 2017. G genes of HRSV were amplified and sequenced for subtyping and genotyping by bioinformatics analysis. Clinical data were collected and analyzed. Results: Out of 590 children, 376 (63.7%) with subtype A, and 214 (36.3) with subtype B. The annual dominant subtypes of HRSV from 2009 to 2017 were B-A-A-B-AB-A-A-B-A, respectively, whilst a total of 10 genotypes were detected with 95.8% assigned to genotype ON1 and NA1 of subtype A, and genotype BA9 of subtype B. Children infected with subtype B (96 cases, 44.9%) were more likely aged 0-3 month old than those with subtype A (118 cases, 31.4%) (P=0.001), and more likely to be admitted to Intensive Care Unit(ICU) ((124 cases, 57.9%) than those with subtype A (172 cases, 45.7%)) (P=0.005). Statistical significance were shown among children infected with genotype ON1, NA1 or BA9, in the possibility of infection in children aged 0-3 month (P=0.003), proportion of admission into ICU (P=0.007), length of stay in hospital (P=0.001), and clinical outcome (P=0.001), respectively. Conclusion: Children infected with different subtype or genotype of HRSV have different clinical characteristics, which stresses the important role of the monitoring HRSV subtypes and genotypes among children.
目的： 分析北京市儿童不同亚型/基因型人呼吸道合胞病毒（HRSV）感染临床特征。 方法： 选取2009—2017年HRSV流行季（11月至次年1月）HRSV阳性住院患儿急性呼吸道标本，进行G蛋白全基因片段PCR扩增，应用生物信息学分析区分HRSV亚型及基因型；进行HRSV亚型及基因型流行趋势及基因进化分析；收集HRSV感染患儿的临床信息并进行统计学分析。 结果： 590例患儿中A亚型为376例（63.7%），B亚型为214例（36.3%）。2009—2017年HRSV每年度优势亚型分别为B-A-A-B-AB-A-A-B-A，共检测到10种基因型，其中A亚型ON1及NA1基因型、B亚型BA9基因型共占比95.8%。临床特征比较中，B亚型（96例，44.9%）较A亚型（118例，31.4%）易引起低月龄（0~3月）儿童感染（P=0.001），且B亚型（124例，57.9%）较A亚型（172例，45.7%）易导致患儿入住重症监护病房（ICU）（P=0.005）。3种优势基因型ON1、NA1、BA9感染患儿月龄分布（P=0.003）、入住ICU占比（P=0.007）、住院时长（P=0.001）、转归（P=0.001）差异均有统计学意义。 结论： HRSV型别与基因型的不同均可导致临床特征的不同，有必要加强HRSV亚型与基因型的监测。.