Epidemiology and genotypic diversity of human Bocavirus in pediatric patients with acute respiratory infection in Beijing
10.3760/cma.j.cn112866-20210726-00131
- VernacularTitle:北京地区呼吸道感染住院儿童中人博卡病毒流行病学和基因进化分析
- Author:
Qian ZHANG
1
;
Chao WANG
;
Yiman HUANG
;
Fenlian MA
;
Lishu ZHENG
Author Information
1. 中国疾病预防控制中心病毒病预防控制所 国家卫生健康委员会医学病毒与病毒病重点实验室，北京 100052
- Keywords:
Respiratory infections;
Human bocavirus;
Phylogenetic analysis
- From:
Chinese Journal of Experimental and Clinical Virology
2022;36(1):65-70
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To investigate the epidemiological characteristics of human bocavirus 1 (HBoV1) and to analyze the genetic variation.Methods:A total of 2 848 nasopharyngeal aspirate (NPAs) specimens were collected from hospitalized children with acute respiratory tract infections (ARTI) in Beijing Friendship Hospital from April 2017 to March 2019, and HBoV1 was detected by quantitative real-time PCR. Epidemiological analysis was carried out based on the clinical information of the patients. The nested PCR method was used to amplify the NP1 and VP1 genes of HBoV1 for homology analysis. Maximum clade credibility tree (MCC tree) and genetic polymorphism map were constructed to analyze the time evolution of HBoV1 VP1.Results:HBoV1 was detected in 90(3.16%) of 2 848 NPAs, most (93.33%, 84/90) HBoV1-positive cases were among children <5 years of age. HBoV1 could be detected throughout the year with a higher prevalence 7.23% (18/249) in October. Of the 90 HBoV1-infected cases, the main clinical symptoms were fever and cough, 44(48.89%) were co-infected with other respiratory viruses; 55 NP1 sequences and 47 VP1 sequences were obtained by nested PCR amplification, phylogenetic analysis showed that the nucleotide homology was 98.9%~-100% and 99.1%~-100%, respectively. MCC tree showed that the HBoV1 VP1 gene sequence obtained in this study appeared in two adjacent clades, the gene evolution was stable.Conclusions:HBoV1 is one of the common viruses that cause respiratory infection among children in Beijing. HBoV1 genetic evolution is relatively stable, but it still needs to be monitored continuously.
